Net Income Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income—basic and diluted	$ 755	$ 225
Denominator:
Basic weighted-average common shares outstanding (in shares)	156.8	157.2
Diluted weighted-average shares	157.9	158.5
Earnings (loss) per share:
Basic (in USD per share)	$ 4.82	$ 1.43
Diluted (in USD per share)	$ 4.78	$ 1.42
Number of anti-dilutive stock-based awards (in shares)	1.3	1.0
Stock Options
Denominator:
Effect of stock-based awards (in shares)	0.7	0.8
Nonvested shares
Denominator:
Effect of stock-based awards (in shares)	0.4	0.5