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Financial Instruments (Details)
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
USD ($)
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Dec. 31, 2010
USD ($)
|
Dec. 31, 2009
USD ($)
|
Dec. 31, 2011
Hedged Fixed-Rate Debt [Member]
USD ($)
|
Dec. 31, 2010
Hedged Fixed-Rate Debt [Member]
USD ($)
|
Dec. 31, 2009
Hedged Fixed-Rate Debt [Member]
USD ($)
|
Dec. 31, 2011
Equity Contract [Member]
USD ($)
|
Dec. 31, 2010
Equity Contract [Member]
USD ($)
|
Dec. 31, 2009
Equity Contract [Member]
USD ($)
|
Dec. 31, 2011
Interest Rate Contract [Member]
USD ($)
|
Dec. 31, 2010
Interest Rate Contract [Member]
USD ($)
|
Dec. 31, 2009
Interest Rate Contract [Member]
USD ($)
|
Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Equity Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
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Dec. 31, 2010
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Equity Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Estimate of Fair Value, Fair Value Disclosure [Member]
Equity Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Estimate of Fair Value, Fair Value Disclosure [Member]
Interest Rate Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2010
Estimate of Fair Value, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Assets [Member]
USD ($)
|
Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2010
Estimate of Fair Value, Fair Value Disclosure [Member]
Foreign Exchange Contract [Member]
Other Liabilities [Member]
USD ($)
|
Dec. 31, 2011
Corporate Debt Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Corporate Debt Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Corporate Debt Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Corporate Debt Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Corporate Debt Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Corporate Debt Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2011
Corporate Debt Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Corporate Debt Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
US Government Agencies Debt Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
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Dec. 31, 2010
US Government Agencies Debt Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
US Government Agencies Debt Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
US Government Agencies Debt Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
US Government Agencies Debt Securities [Member]
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2010
US Government Agencies Debt Securities [Member]
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2011
US Government Agencies Debt Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
US Government Agencies Debt Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Other Debt Obligations [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Other Debt Obligations [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Other Debt Obligations [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Other Debt Obligations [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Other Debt Obligations [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Other Debt Obligations [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2011
Other Debt Obligations [Member]
Fair Value, Inputs, Level 3 [Member]
USD ($)
|
Dec. 31, 2010
Other Debt Obligations [Member]
Fair Value, Inputs, Level 3 [Member]
USD ($)
|
Dec. 31, 2011
Other Debt Obligations [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Other Debt Obligations [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Collateralized Mortgage Backed Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Collateralized Mortgage Backed Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Collateralized Mortgage Backed Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Collateralized Mortgage Backed Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Collateralized Mortgage Backed Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Collateralized Mortgage Backed Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2011
Collateralized Mortgage Backed Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Collateralized Mortgage Backed Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Asset-backed Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Asset-backed Securities [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Asset-backed Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Asset-backed Securities [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Asset-backed Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2010
Asset-backed Securities [Member]
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Dec. 31, 2011
Asset-backed Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Asset-backed Securities [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Equity Securities, US [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Equity Securities, US [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Equity Securities, US [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Equity Securities, US [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Equity Securities, US [Member]
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2010
Equity Securities, US [Member]
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Dec. 31, 2011
Equity Securities, US [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2010
Equity Securities, US [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Equity Method and Other Investments [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
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Dec. 31, 2010
Equity Method and Other Investments [Member]
Carrying (Reported) Amount, Fair Value Disclosure [Member]
USD ($)
|
Dec. 31, 2011
Equity Method and Other Investments [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2010
Equity Method and Other Investments [Member]
Available-for-Sale Securities, Amortized Cost [Member]
USD ($)
|
Dec. 31, 2011
Buy British pound Sell euro [Member]
EUR (€)
|
Dec. 31, 2011
Buy British pound Sell euro [Member]
GBP (£)
|
Dec. 31, 2011
Buy euro Sell US dollar [Member]
USD ($)
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Dec. 31, 2011
Buy euro Sell US dollar [Member]
EUR (€)
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| Cash and Cash Equivalents, Fair Value Disclosure | $ 5,922,500,000 | $ 5,993,200,000 | $ 5,922,500,000 | $ 5,993,200,000 | $ 5,264,600,000 | $ 2,138,600,000 | $ 657,900,000 | $ 3,854,600,000 | $ 5,922,500,000 | $ 5,993,200,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commercial Paper, at Carrying Value | 540,800,000 | 540,800,000 | 540,800,000 | 540,800,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term Debt | (6,981,500,000) | (6,788,700,000) | (6,981,500,000) | (6,788,700,000) | (7,451,500,000) | (7,030,000,000) | (7,451,500,000) | (7,030,000,000) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Assets, Current | 6,100,000 | 16,200,000 | 13,700,000 | 6,100,000 | 16,200,000 | 13,700,000 | 6,100,000 | 16,200,000 | 13,700,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets | 90.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notional Amount of Foreign Currency Derivative Purchase Contracts | 494,300,000 | 1,610,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notional Amount of Foreign Currency Derivative Sale Contracts | 583,400,000 | 2,110,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Maximum Remaining Maturity of Foreign Currency Derivatives | 30 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 90.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Description of Derivative Activity Volume Percent | 70.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 259,600,000 | 149,600,000 | (369,500,000) | (259,600,000) | (149,600,000) | 369,500,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net | 9,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion | 9,000,000 | 9,000,000 | 10,200,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Instruments, Gain (Loss) Recognized in Income, Net | 97,400,000 | 12,000,000 | 82,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | 35,600,000 | (35,600,000) | 0 | 0 | 0 | 38,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Assets, Noncurrent | 531,700,000 | 278,300,000 | 531,700,000 | 278,300,000 | 531,700,000 | 278,300,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Liabilities, Current | 35,600,000 | 25,900,000 | 31,600,000 | 35,600,000 | 25,900,000 | 31,600,000 | 35,600,000 | 25,900,000 | 31,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Liabilities, Fair Value Disclosure | 121,600,000 | 163,500,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 4,030,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Gross Unrealized Gains | 103,000,000 | 262,600,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Gross Unrealized Losses | 80,000,000 | 61,100,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Continuous Unrealized Gain Position, Fair Value | 2,498,900,000 | 1,031,800,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,164,400,000 | 758,100,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other than Temporary Impairment Losses, Investments | 26,800,000 | 12,000,000 | 22,400,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax | 114,100,000 | 53,500,000 | 186,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Proceeds from Sale and Maturity of Available-for-sale Securities | 2,268,300,000 | 760,300,000 | 1,227,400,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Gross Realized Gains | 140,000,000 | 110,700,000 | 68,900,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Gross Realized Losses | 9,900,000 | 4,800,000 | 6,800,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Current [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Debt Securities, Current | 600,700,000 | 63,400,000 | 601,100,000 | 63,900,000 | 600,700,000 | 63,400,000 | 600,700,000 | 63,400,000 | 362,300,000 | 128,900,000 | 362,300,000 | 128,900,000 | 362,300,000 | 128,900,000 | 362,300,000 | 128,900,000 | 11,600,000 | 700,000 | 11,600,000 | 700,000 | 11,600,000 | 700,000 | 11,600,000 | 700,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Current, Total | 974,600,000 | 733,800,000 | 975,000,000 | 734,300,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Noncurrent [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Debt Securities, Noncurrent | 2,081,300,000 | 367,900,000 | 2,093,300,000 | 368,900,000 | 2,081,300,000 | 367,900,000 | 2,081,300,000 | 367,900,000 | 908,800,000 | 359,200,000 | 901,300,000 | 361,800,000 | 908,800,000 | 359,200,000 | 908,800,000 | 359,200,000 | 10,000,000 | 6,400,000 | 11,900,000 | 8,300,000 | 8,700,000 | 3,300,000 | 1,300,000 | 3,100,000 | 10,000,000 | 6,400,000 | 443,800,000 | 315,500,000 | 479,100,000 | 350,700,000 | 443,800,000 | 315,500,000 | 443,800,000 | 315,500,000 | 245,000,000 | 132,400,000 | 253,200,000 | 140,800,000 | 245,000,000 | 132,400,000 | 245,000,000 | 132,400,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Equity Securities, Noncurrent | 180,800,000 | 433,700,000 | 107,500,000 | 182,600,000 | 180,800,000 | 433,700,000 | 180,800,000 | 433,700,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Long-term Investments | 160,100,000 | 164,400,000 | 160,100,000 | 164,400,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Available-for-sale Securities, Noncurrent, Total | $ 4,029,800,000 | $ 1,779,500,000 | $ 4,006,400,000 | $ 1,577,500,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||