Fair Value of Financial Instruments - Carrying Amounts (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value Inputs, Level 2 | Carrying Amount
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	$ 18,398	$ 19,703
Fair Value Inputs, Level 2 | Fair Value
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	13,950	13,304
Fair Value, Inputs, Level 3 | Carrying Amount
Fair value disclosure
Indemnifications related to the sale of the Latin American business	86	86
Fair Value, Inputs, Level 3 | Fair Value
Fair value disclosure
Indemnifications related to the sale of the Latin American business	$ 86	$ 86