Investments (Unconsolidated Equity Investments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Equity income from unconsolidated investments, net	$ (16)	$ (19)	$ (32)	$ (34)
ATC Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Equity income from unconsolidated investments, net	(11)	(11)	(23)	(22)
Other [Member]
Schedule of Equity Method Investments [Line Items]
Equity income from unconsolidated investments, net	(5)	(8)	(9)	(12)
Total [Member]
Schedule of Equity Method Investments [Line Items]
Equity income from unconsolidated investments, net	$ (16)	$ (19)	$ (32)	$ (34)