Summary of Significant Accounting Policies (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic earnings (loss) per share:
Net income (loss)	$ 1,197	$ 612	$ 759
Weighted average common shares outstanding (in shares)	383,000,000	381,000,000	380,000,000
Basic earnings (loss) per share (in dollars per share)	$ 3.12	$ 1.61	$ 2.00
Diluted earnings (loss) per share:
Net income (loss)	$ 1,197	$ 612	$ 759
Income impact of assumed conversions	1	1	1
Net income (loss) available to common shareholders and assumed conversions	$ 1,198	$ 613	$ 760
Weighted average common shares outstanding (in shares)	383,000,000	381,000,000	380,000,000
Incremental shares from assumed conversions (in shares)	2,000,000	2,000,000	0
Adjusted weighted average shares - diluted (in shares)	385,000,000	383,000,000	380,000,000
Diluted earnings (loss) per share (in dollars per share)	$ 3.11	$ 1.60	$ 2.00
Antidilutive awards excluded from earnings per share (in shares)	3,771,766	5,839,549	10,239,501