XML 26 R52.htm IDEA: XBRL DOCUMENT v2.4.0.8
Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]    
Accumulated other comprehensive income (loss), reclassified $ 7 $ 4
Amount of gain (loss) recognized in income on derivative (ineffective portion)      
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) 13 3
Scenario, Forecast [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Accumulated other comprehensive income (loss), reclassified $ (19)