Summary of Significant Accounting Policies (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per share:
Net (loss) income attributable to common shareholders	$ 759	$ 739	$ 1,284
Net income available to common shareholders	$ 759	$ 739	$ 1,284
Weighted average common shares outstanding (in shares)	380,000,000	373,000,000	340,000,000
Basic earnings per share (in dollars per share)	$ 2.00	$ 1.98	$ 3.78
Diluted earnings per share:
Net (loss) income attributable to common shareholders	$ 759	$ 739	$ 1,284
Net income available to common shareholders	759	739	1,284
Income impact of assumed conversions	1	0	0
Net income available to common shareholders and assumed conversions	$ 760	$ 739	$ 1,284
Weighted average common shares outstanding (in shares)	380,000,000	373,000,000	340,000,000
Incremental shares from assumed conversions (in shares)	0	1,000,000	1,000,000
Adjusted weighted average shares - diluted (in shares)	380,000,000	374,000,000	341,000,000
Diluted earnings per share (in dollars per share)	$ 2.00	$ 1.98	$ 3.77
Stock Compensation Plan
Diluted earnings per share:
Antidilutive awards excluded from earnings per share (in shares)	10,239,501	9,066,753	4,511,802