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Contingencies and Commitments - Leases (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]          
Right-of-use assets $ 481   $ 481   $ 473
Lease liabilities, current 125   125   121
Lease liabilities, non-current $ 363   $ 363   $ 357
Other information:          
Weighted-average remaining lease term (years) 5 years 8 months 12 days   5 years 8 months 12 days   5 years 6 months
Weighted-average discount rate 3.60%   3.60%   3.22%
Operating lease cost $ 41 $ 38 $ 79 $ 73