Supplementary Financial Information - Pension and Other Benefit Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Supplemental Financial Information [Line Items]
Accrued compensation liabilities	$ 61	$ 66
Deferred compensation liabilities	17	22
Pension and other benefit liabilities	1,175	1,373
Pension Plan
Supplemental Financial Information [Line Items]
Pension liabilities	1,097	1,285
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring
Supplemental Financial Information [Line Items]
Financial liabilities, fair value	25	29
Deferred Compensation Liabilities | Significant Other Observable Inputs (Level 2) | Fair Value, Recurring
Supplemental Financial Information [Line Items]
Financial liabilities, fair value	$ 14	$ 18