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Financial Instruments Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Cash Equivalents [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	$ 1,726	$ 2,179	$ 1,543
Marketable Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	1	8	1
Debt Securities, Available-for-sale [Line Items]
Available - for- sale securities	76	0	16
Other Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available - for- sale securities	$ 21	$ 97	$ 90

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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