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Fair Value Measurements - (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Level 3 \| Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	$ 789		$ 789
Investments	18		18
Not Designated as Hedging Instrument, Economic Hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments	12		12		$ 3
Not Designated as Hedging Instrument, Economic Hedge \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount	209		209
Derivative instrument hedging gain (loss)	$ 12	$ (1)	$ 15	$ (4)