Summary of Significant Accounting Policies (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic earnings (loss) per share:
Net (loss) income available to common shareholders	$ (11)	$ 310
Weighted average common shares outstanding (in shares)	385,000,000	383,000,000
Basic (loss) earnings per share (in dollars per share)	$ (0.03)	$ 0.81
Diluted earnings (loss) per share:
Net (loss) income available to common shareholders	$ (11)	$ 310
Income impact of assumed conversions		1
Net (loss) income available to common shareholders and assumed conversions	$ (11)	$ 311
Weighted average common shares outstanding (in shares)	385,000,000	383,000,000
Incremental shares from assumed conversions (in shares)		1,000,000
Adjusted weighted average shares - diluted (in shares)	385,000,000	384,000,000
Diluted (loss) earnings per share (in dollars per share)	$ (0.03)	$ 0.81
Stock Compensation Plan
Diluted earnings (loss) per share:
Antidilutive awards excluded from earnings per share (in shares)	4,202,791	4,414,113