Summary of Significant Accounting Policies (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic earnings per share:
Net income attributable to common shareholders	$ 241	$ 318	$ 325	$ 577
Net income available to common shareholders	$ 241	$ 318	$ 325	$ 577
Weighted average common shares outstanding (in shares)	381,000,000	380,000,000	381,000,000	379,000,000
Basic earnings per share (in dollars per share)	$ 0.63	$ 0.84	$ 0.85	$ 1.52
Diluted earnings per share:
Net income attributable to common shareholders	$ 241	$ 318	$ 325	$ 577
Net income available to common shareholders	241	318	325	577
Net income available to common shareholders and assumed conversions	$ 241	$ 318	$ 325	$ 577
Weighted average common shares outstanding (in shares)	381,000,000	380,000,000	381,000,000	379,000,000
Incremental shares from assumed conversions (in shares)	2,000,000		1,000,000	1,000,000
Adjusted weighted average shares - diluted (in shares)	383,000,000	380,000,000	382,000,000	380,000,000
Diluted earnings per share (in dollars per share)	$ 0.63	$ 0.84	$ 0.85	$ 1.52
Stock Compensation Plan
Diluted earnings per share:
Antidilutive awards excluded from earnings per share (in shares)	3,990,270	11,327,374	5,261,914	11,369,725