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Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Loss) (Parenthetical) (Detail) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]      
Accumulated other comprehensive income (loss), reclassified $ (52,000,000) $ (46,000,000)  
Amount of gain (loss) recognized in income on derivative (ineffective portion) (16,000,000) 0  
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) $ (1,000,000) $ (1,000,000)  
Scenario, Forecast [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Accumulated other comprehensive income (loss), reclassified     $ (124,000,000)