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Schedule of After Tax Benefits Related To Interest and Penalties in Provision for Income Taxes (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
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| Income Tax Contingency [Line Items] | |||
| Income tax examination, penalties and interest expense | $ 33 | $ 82 | $ 60 |