Fair Value Measurements (Financial Assets and Liabilities Carried at Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets:
Available-for-sale debt securities	$ 13	$ 20
Investment in equity securities	314	336
Cross-currency swap derivative contracts	1,164	50
Quoted Prices in Active Market (Level 1)
Assets:
Available-for-sale debt securities	0	0
Investment in equity securities	19	88
Cross-currency swap derivative contracts	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale debt securities	13	20
Investment in equity securities	0	0
Cross-currency swap derivative contracts	1,164	50
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale debt securities	0	0
Investment in equity securities	0	0
Cross-currency swap derivative contracts	$ 0	$ 0