XML 70 R58.htm IDEA: XBRL DOCUMENT v3.5.0.2
Schedule of Cash Flow Hedges Effect on Accumulated Other Comprehensive Income, Net of Taxes (Detail) - Cash Flow Hedges - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]        
Accumulated gain / (loss) at beginning of period $ (36) $ (53) $ (45) $ (2)
Transfer of realized losses / (gains) in fair value to earnings (2) 60 64 6
Unrealized gain / (loss) in fair value 4 (69) (53) (66)
Accumulated gain / (loss) at end of period $ (34) $ (62) $ (34) $ (62)