Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Carrying value
Financial Instruments
Long-term debt, excluding current portion	$ 11,854	$ 11,125
Fair value
Financial Instruments
Long-term debt, excluding current portion	$ 10,844	$ 9,856

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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+ Details