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
	Mar. 31, 2024	Mar. 31, 2023
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income available to common shareholders	$ 480	$ 535
Average common shares outstanding - basic (in shares)	685,749,673	684,017,462
Effect of dilutive stock-based awards	5,000,000	6,000,000
Earnings per share (in dollars per share)	$ 0.70	$ 0.78
Earnings per diluted share (in dollars per share)	$ 0.70	$ 0.78
Anti-dilutive securities (in shares)	3,000,000	4,000,000