Earnings Per Share - Calculation of Earnings Per Share and the Reconciliation of Earnings Per Share to Earnings Per Diluted Share (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
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income available to common shareholders	$ 561	$ 562	$ 1,041	$ 1,097
Average common shares outstanding - basic (in shares)	686,781,201	684,028,603	686,265,437	684,023,063
Effect of dilutive stock-based awards	4,000,000	2,000,000	5,000,000	4,000,000
Average common shares outstanding - diluted (in shares)	691,082,792	686,385,938	690,858,162	687,967,395
Earnings per share (in dollars per share)	$ 0.82	$ 0.82	$ 1.52	$ 1.60
Earnings per diluted share (in dollars per share)	$ 0.81	$ 0.82	$ 1.51	$ 1.59
Anti-dilutive securities (in shares)	2,000,000	9,000,000	2,000,000	6,000,000