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Financial Instruments (Details) (USD $)
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6 Months Ended | 12 Months Ended | |
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Jun. 30, 2011
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Jun. 30, 2010
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Dec. 31, 2010
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| Earnings Impact [Abstract] | |||
| Decrease in interest expense from interest rate hedging | $ 0 | $ 2,000,000 | |
| Increase in pre-tax income | 0 | 2,000,000 | |
| Fair Value of Debt Instruments [Abstract] | |||
| Fair value of total debt | 9,900,000,000 | 10,400,000,000 | |
| Fair value of total debt in excess of carrying value | 1,000,000,000 | 1,200,000,000 | |
| Fixed rate debt securities containing call provisions | 303,000,000 | 303,000,000 | |
| Interest Rate Cash Flow Hedges [Abstract] | |||
| Change in fair value of cash flow hedges as reported in accumulated other comprehensive loss | 2,000,000 | 3,000,000 | |
| Interest rate cash flow hedges outstanding | $ 0 | $ 0 | |
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- Details
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- Definition
Fair value of total debt in excess of carrying value.
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- Definition
Amount of debt securities that contain a provision to retire the debt instrument prior to final maturity, with the payment of fixed call premiums, or in certain cases, at par.
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The net gain (loss) included in earnings for the period relating to components of the gain (loss) on interest rate fair value hedging instruments excluded from the assessment of fair value hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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