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Provision for Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Income Tax Disclosure [Line Items] | |||
| Balance as of January 1, | $ 169 | $ 195 | $ 52 |
| Increases from tax positions taken during prior periods | 16 | 10 | |
| Decreases from tax positions taken during prior periods | (25) | (12) | (7) |
| Increases from tax positions taken during current period | 2 | 10 | 140 |
| Decreases relating to settlements with the tax authorities | (23) | (24) | |
| Balance as of December 31, | $ 139 | $ 169 | $ 195 |
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- Details
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- Definition
The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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