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Supplemental Information Related Operating Leases (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Operating Lease, Payments $ 155 $ 164 $ 163
Finance Lease, Principal Payments 13 14 18
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 34 198 504
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability 56 20 38
Right of Use Asset Obtained in Exchange for Operating Lease Liability Modifications $ 61 $ 98 $ 31