Stock-Based Compensation - Schedule of pre-tax compensation expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock-based compensation
Pre-tax compensation expense	$ 8	$ 9	$ 47	$ 51
Restricted stock units
Stock-based compensation
Pre-tax compensation expense	4	3	29	26
Performance restricted stock units
Stock-based compensation
Pre-tax compensation expense	1	2	5	8
Stock options
Stock-based compensation
Pre-tax compensation expense	1	1	7	6
Long-term stock awards
Stock-based compensation
Pre-tax compensation expense	2	2	6	8
Phantom stock awards
Stock-based compensation
Pre-tax compensation expense	$ 0	$ 1	$ 0	$ 3