Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Equity securities held	$ 113,000,000	$ 101,000,000
Purchase of long-term investments	12,000,000	34,000,000	$ 32,000,000
Realized gain on equity securities	$ 0	$ 2,000,000	$ 5,000,000