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Shareholders' Equity (Details) (USD $)
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3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||||||||||||
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2011
Additional Paid-in Capital [Member]
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Dec. 31, 2013
Retained Earnings [Member]
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Dec. 31, 2012
Retained Earnings [Member]
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Dec. 31, 2011
Retained Earnings [Member]
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Dec. 31, 2013
Treasury Stock [Member]
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Dec. 31, 2012
Treasury Stock [Member]
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Dec. 31, 2011
Treasury Stock [Member]
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Dec. 31, 2012
2000 Share Repurchase Program [Member]
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Dec. 31, 2000
2000 Share Repurchase Program [Member]
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Dec. 31, 2013
2012 Share Repurchase Program [Member]
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Dec. 31, 2012
2012 Share Repurchase Program [Member]
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Oct. 31, 2013
2013 Share Repurchase Program [Member]
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Dec. 31, 2013
2013 Share Repurchase Program [Member]
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| Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | $ 17,640,700,000 | $ 14,773,900,000 | $ 17,640,700,000 | $ 14,773,900,000 | ||||||||||||||||||||
| Common stock shares in treasury, shares in thousands | 833,000 | 2,850,000 | 833,000 | 2,850,000 | ||||||||||||||||||||
| Net income | 727,500,000 | 1,203,100,000 | 1,206,200,000 | 1,548,000,000 | 827,200,000 | 1,326,600,000 | 923,600,000 | 1,011,100,000 | 4,684,800,000 | 4,088,600,000 | 4,347,700,000 | 4,684,800,000 | 4,088,600,000 | 4,347,700,000 | ||||||||||
| Treasury Stock, Retired, Cost Method, Amount | 0 | 100,000 | 0 | (100,000) | (1,677,800,000) | (711,700,000) | 1,698,100,000 | 721,100,000 | 100,000 | (419,200,000) | (1,100,000,000) | (400,000,000) | (500,000,000) | |||||||||||
| Stock Repurchased During Period, Shares | 0 | |||||||||||||||||||||||
| Stock Repurchase Program, Authorized Amount | 3,000,000,000 | 1,500,000,000 | 5,000,000,000 | |||||||||||||||||||||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | 4,500,000,000 | |||||||||||||||||||||||
| Treasury Stock, Shares, Retired | (32,406,000) | (14,912,000) | (1,000) | |||||||||||||||||||||
| Preferred Stock, Shares Authorized | 5,000,000 | 5,000,000 | ||||||||||||||||||||||
| Preferred Stock, Shares Issued | 0 | 0 | ||||||||||||||||||||||
| Common Stock, Shares Held in Employee Trust, Shares | 50,000,000 | 50,000,000 | 50,000,000 | 50,000,000 | ||||||||||||||||||||
| Employee benefit trust | 3,013,200,000 | 3,013,200,000 | 3,013,200,000 | 3,013,200,000 | ||||||||||||||||||||
| Other comprehensive income (loss) | 1,794,400,000 | 61,500,000 | (1,188,500,000) | |||||||||||||||||||||
| Allocated Share-based Compensation Expense | $ 144,900,000 | $ 141,500,000 | $ 147,400,000 | |||||||||||||||||||||
| Issued shares, shares in thousands | 1,117,628,000 | 1,146,493,000 | 1,117,628,000 | 1,146,493,000 | ||||||||||||||||||||