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Derivative Instruments (Details 2) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]        
Unrealized gains (losses) arising during the period $ 1 $ (8) $ 17 $ (101)
Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax (1) (1) (3) 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax 1 (2) 5 (25)
Interest Rate Swap [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 9 4 17 6
Unrealized gains (losses) arising during the period 0 (6) 17 (104)
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net (2) 2 (2) (5)
Unrealized gains (losses) arising during the period $ 1 $ (2) $ 0 $ 3