Summary of Significant Accounting Policies (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Basic earnings per share:
Net income available to common shareholders	$ 439	$ 354	$ 428	$ 664
Weighted average common shares outstanding (in shares)	385,000,000	383,000,000	385,000,000	383,000,000
Basic earnings per share (in dollars per share)	$ 1.14	$ 0.92	$ 1.11	$ 1.73
Diluted earnings per share:
Net income available to common shareholders	$ 439	$ 354	$ 428	$ 664
Income impact of assumed conversions	1		1	1
Net income available to common shareholders and assumed conversions	$ 440	$ 354	$ 429	$ 665
Weighted average common shares outstanding (in shares)	385,000,000	383,000,000	385,000,000	383,000,000
Incremental shares from assumed conversions (in shares)	3,000,000	2,000,000	2,000,000	2,000,000
Adjusted weighted average shares - diluted (in shares)	388,000,000	385,000,000	387,000,000	385,000,000
Diluted earnings per share (in dollars per share)	$ 1.13	$ 0.92	$ 1.11	$ 1.73
Stock Compensation Plan
Diluted earnings per share:
Antidilutive awards excluded from earnings per share (in shares)	1,899,476	2,046,312	3,051,134	3,230,213