Fair Value Measurements (Carrying Amounts and Fair Values of Other Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable and current portion of long-term debt	$ 591	$ 8
Long-term debt	19,086	22,168
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable and current portion of long-term debt	584	8
Long-term debt	$ 16,079	$ 22,796