Financial Instruments Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Cash Equivalents [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	$ 2,296	$ 3,400
Marketable Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	124	$ 86
Other Assets [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	$ 27