XML 77 R71.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Fair Value Measurements - Foreign Currency Forward Contracts (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]                      
Net revenues $ 1,986 $ 1,282 $ 1,396 $ 1,825 $ 2,381 $ 1,512 $ 1,641 $ 1,965 $ 6,489 $ 7,500 $ 7,017
Buy USD, Sell Euro | Designated as Hedges | Cash Flow Hedging                      
Derivatives, Fair Value [Line Items]                      
Notional amount of foreign currency derivatives 350       723       350 723  
Fair value of foreign currency forward contracts (2)       12       (2) 12  
Foreign currency forward contracts | Cash Flow Hedging | Reclassification out of Accumulated Other Comprehensive Income                      
Derivatives, Fair Value [Line Items]                      
Net revenues                 $ 39 7 $ (1)
Foreign currency forward contracts | Designated as Hedges | Cash Flow Hedging                      
Derivatives, Fair Value [Line Items]                      
Maximum length of time over which our foreign currency forward contracts mature                 12 months    
Deferred cash flow hedge gain (loss) to be reclassified within twelve months                 $ 10    
Deferred cash flow hedge gain (loss) in AOCI 10               10    
Buy USD, Sell GBP | Not Designated as Hedging Instrument                      
Derivatives, Fair Value [Line Items]                      
Notional amount of foreign currency derivatives 25       55       25 55  
Fair value of foreign currency forward contracts $ (2)       $ 1       $ (2) $ 1