Stock-Based Compensation - Summary of Share-Based Compensation Expense Income Tax Benefit Awards Issued Under Incentive Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 21	$ 26	$ 44	$ 70
Income tax benefit	0	10	2	15
Restricted stock units - employees and non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	14	10	28	29
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	3	5	11	15
Performance share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	4	10	12	20
Deferred performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 0	$ 1	$ (7)	$ 6