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Financial Instruments Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Fair Value, Within One Year	$ 16
Fair Value, one to five years	90
Cash Equivalents [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	1,543	$ 1,746	$ 1,619
Marketable Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	$ 56	98	$ 108
Other Assets [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities		$ 55

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- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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