Net Income (Loss) Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income (loss)—basic and diluted	$ 534	$ (818)	$ 759	$ (1,084)
Denominator:
Basic weighted-average common shares outstanding (in shares)	157.0	159.6	157.1	160.0
Diluted weighted-average shares	158.0	159.6	158.3	160.0
Earnings (loss) per share:
Basic (in USD per share)	$ 3.40	$ (5.12)	$ 4.83	$ (6.77)
Diluted (in USD per share)	$ 3.38	$ (5.12)	$ 4.80	$ (6.77)
Number of anti-dilutive stock-based awards (in shares)	1.5	2.0	1.5	2.2
Stock Options
Denominator:
Effect of stock-based awards (in shares)	0.6	0.0	0.8	0.0
Nonvested shares
Denominator:
Effect of stock-based awards (in shares)	0.4	0.0	0.4	0.0