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Operating Leases - Narratives (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease cost $ 159 $ 210
Variable lease cost 39 39
Operating lease impairment loss   30
Operating lease payments 165 165
Right of use asset obtained in exchange for operating lease liability $ 83 $ 138
Weighted average lease term 5 years 6 months 5 years 9 months 18 days
Weighted average discount rate 3.00% 3.20%