Investments (Summary Financial Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 4,205	$ 3,669	$ 3,416
Current assets	1,250	1,069
Current liabilities	2,363	2,054
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Revenues	813	802	801
Operating income	350	357	376
Net income	675	358	$ 343
Current assets	227	112
Non-current assets	8,292	7,036
Current liabilities	620	455
Non-current liabilities	3,285	3,110
Noncontrolling interest	$ 289	$ 247