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Fair Value of Financial Instruments - Carrying Amounts (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value Inputs, Level 2 | Carrying Amount
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	$ 17,439	$ 17,652
Fair Value Inputs, Level 2 | Fair Value
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	17,220	17,127
Fair Value, Inputs, Level 3 | Carrying Amount
Fair value disclosure
Indemnifications related to the sale of the Latin American business	86	87
Fair Value, Inputs, Level 3 | Fair Value
Fair value disclosure
Indemnifications related to the sale of the Latin American business	$ 82	$ 84

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