XML 79 R68.htm IDEA: XBRL DOCUMENT v3.21.2
Derivative Instruments Derivative Instruments (Fair Value Hedge Attributable to Foreign Currency) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments $ (4) $ 6 $ (6) $ (2)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge $ 4 $ (5) $ 7 $ (3)