Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Class of Stock [Line Items]
Net income from continuing operations		$ 296	[1]	$ 300	$ 945	[1]	$ 1,437	[1]
Net income from continuing operations attributable to common stockholders	[1]	269		273	862		1,354
Loss from discontinued operations, net of tax	[1]	0		(1)	(1)		(1)
Net income attributable to common stockholders	[1]	$ 269		$ 272	$ 861		$ 1,353
Basic weighted-average common shares outstanding (in shares)	[1],[2]	304,134		308,220	303,497		321,884
Diluted weighted-average common shares outstanding (in shares)	[1],[2]	305,693		310,086	304,601		323,875
Basic earnings per common share
Net income from continuing operations (in dollars per share)	[1]	$ 0.88		$ 0.88	$ 2.84		$ 4.20
Loss from discontinued operations, net of tax (in dollars per share)	[1]	0		0	(0.01)		0
Net income (in dollars per share)	[1]	0.88		0.88	2.84		4.20
Diluted earnings per common share
Net income from continuing operations (in dollars per share)	[1]	0.88		0.88	2.83		4.18
Loss from discontinued operations, net of tax (in dollars per share)	[1]	0		0	(0.01)		0
Net income (in dollars per share)	[1]	$ 0.88		$ 0.88	$ 2.83		$ 4.18
Preferred stock dividends — Series B
Class of Stock [Line Items]
Preferred stock dividends	[1]	$ (16)		$ (16)	$ (48)		$ (48)
Preferred stock dividends — Series C
Class of Stock [Line Items]
Preferred stock dividends	[1]	$ (11)		$ (11)	$ (35)		$ (35)

[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.