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, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock based compensation, Nonvested shares rollforward, number of shares
Nonvested stock units, beginning of period - Number of shares (in shares)	1,248,000
Granted number of shares (in shares)	643,000
Vested number of shares (in shares)	(300,000)
Forfeited number of shares (in shares)	(134,000)
Nonvested stock units, end of period - Number of shares (in shares)	1,457,000	1,248,000
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)	$ 32.51
Granted weighted average grant date fair value (USD per share)	21.26	$ 31.35	$ 37.67
Vested weighted average grant date fair value (USD per share)	28.41
Forfeited weighted average grant date fair value (USD per share)	26.53
Nonvested stock units - end of period weighted average grant date fair value (USD per share)	$ 27.37	$ 32.51
Shares issued and granted under stock compensation plans
Fair value of vested stock units	$ 7	$ 6	$ 22
Award vesting period	3 years
2021 and 2022 Grants
Shares issued and granted under stock compensation plans
Performance period	3 years
2021 and 2022 Grants | Discretionary maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	100.00%
2021 Grants
Shares issued and granted under stock compensation plans
Incremental expense of plan modification	$ 3
2022 Grants
Shares issued and granted under stock compensation plans
Incremental expense of plan modification	$ 1
2023 Grants
Shares issued and granted under stock compensation plans
Performance period	1 year
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	100.00%
Minimum | 2021 and 2022 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	75.00%
Minimum | 2023 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	0.00%
Maximum | 2021 and 2022 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	200.00%
Maximum | 2023 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards target	150.00%