Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Class of Stock [Line Items]
Net income from continuing operations		$ 329	[1]	$ 482	$ 649	[1]	$ 1,137	[1]
Net income from continuing operations attributable to common stockholders	[1]	301		454	593		1,081
Loss from discontinued operations, net of tax	[1]	0		0	(1)		0
Net income attributable to common stockholders	[1]	$ 301		$ 454	$ 592		$ 1,081
Basic weighted-average common shares outstanding (in shares)	[1],[2]	303,684		322,057	303,173		328,830
Diluted weighted-average common shares outstanding (in shares)	[1],[2]	304,646		324,027	304,050		330,882
Basic earnings per common share
Net income from continuing operations (in dollars per share)	[1]	$ 0.99		$ 1.41	$ 1.96		$ 3.29
Net income (in dollars per share)	[1]	0.99		1.41	1.95		3.29
Diluted earnings per common share
Net income from continuing operations (in dollars per share)	[1]	0.99		1.40	1.95		3.27
Net income (in dollars per share)	[1]	$ 0.99		$ 1.40	$ 1.95		$ 3.27
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends	[1]	$ (16)		$ (16)	$ (32)		$ (32)
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends	[1]	$ (12)		$ (12)	$ (24)		$ (24)

[1] Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

[2] Includes shares related to share-based compensation that vested but were not yet issued.