v2.4.0.8
Schedule of Summarized Financial Information for Equity Investees Income Statement (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]      
Net revenue $ 8,984 $ 10,825 $ 12,668
Operating income 1,632 2,823 4,021
Net income $ 925 $ 1,679 $ 2,451