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Fair Value Measurements (Schedule Of Changes In Level 3 Fair Value Measurements) (Details) (USD $)
In Millions, unless otherwise specified |
1 Months Ended | 12 Months Ended | ||||
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Jun. 30, 2009
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Dec. 31, 2011
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Dec. 31, 2011
Long-Term Investments [Member]
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Dec. 31, 2010
Long-Term Investments [Member]
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Dec. 31, 2011
Debt [Member]
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Dec. 31, 2010
Debt [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||
| Long-term investments balance at beginning of period | $ 94 | $ 94 | $ 115 | |||
| Redemptions of principal | (10) | (21) | ||||
| Long-term investments balance at end of period | 84 | 84 | 94 | |||
| Debt balance at beginning of period | (144) | |||||
| Issuance of promissory note | 139 | (139) | ||||
| Foreign exchange translation adjustment | 1 | (9) | ||||
| Accretion of promissory note | (5) | (3) | ||||
| Redemptions of principal | 63 | 7 | ||||
| Debt balance at end of period | $ (85) | $ (144) | ||||
| Interest rate used to estimate the fair value of debt | 3.125% | |||||
| X | ||||||||||
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- Definition
Interest rate used to estimate the fair value of debt. No definition available.
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| X | ||||||||||
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- Definition
Present Value Of Promissory Note No definition available.
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| X | ||||||||||
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- Definition
Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Current period translation adjustment resulting from translating foreign currency financial statements into the reporting currency. Adjustment is not included in determining net income, but is reported in other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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