Stock-Based Compensation - Performance Stock Units (Details) - Long-Term Incentive Plans - Performance Shares - Common Shares - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Stock based compensation, Nonvested shares rollforward, number of shares
Nonvested stock units, beginning of period - Number of shares (in shares)	1,049,000
Granted number of shares (in shares)	487,000
Vested number of shares (in shares)	(183,000)
Forfeited number of shares (in shares)	(105,000)
Nonvested stock units, end of period - Number of shares (in shares)	1,248,000	1,049,000
Stock based compensation, Nonvested shares weighted average grant date fair value
Nonvested stock units - beginning of period weighted average grant date fair value (USD per share)	$ 35.17
Granted weighted average grant date fair value (USD per share)	31.35	$ 37.67	$ 29.71
Vested weighted average grant date fair value (USD per share)	44.44
Forfeited weighted average grant date fair value (USD per share)	32.99
Nonvested stock units - end of period weighted average grant date fair value (USD per share)	$ 32.51	$ 35.17
Shares issued and granted under stock compensation plans
Fair value of vested stock units	$ 6	$ 22	$ 11
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	100.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	0.00%	0.00%	50.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	200.00%	200.00%	200.00%