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Stock-Based Compensation Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Long-Term Incentive Plan
Cash received from exercise of stock options	$ 9.5	$ 11.6	$ 2.2
Tax benefit from exercise of stock options	0.2	0.6	0.2
Intrinsic value of stock options exercised	$ 0.8	$ 2.8	$ 0.8
Volatility (as a percent)	29.90%	29.10%	25.20%
Options granted (shares)	500,000
Expected term (in years)	7 years 3 months 10 days	7 years 10 days	7 years 1 month 13 days
Chief Executive Officer
Long-Term Incentive Plan
Expected term (in years)	7 years	7 years	7 years
Non-executive employees
Long-Term Incentive Plan
Options granted (shares)	0	0	0
Director
Long-Term Incentive Plan
Expected term (in years)	8 years	8 years	8 years
Employee Stock Option
Long-Term Incentive Plan
Unrecognized compensation cost	$ 4.1
Weighted average recognition period	3 years
Expected term (in years)	10 years
Employee Stock Option | Employees
Long-Term Incentive Plan
Award expiration period	10 years
Award vesting period	4 years
Award vesting (as a percent)	25.00%
Restricted Stock Units | Chief Executive Officer
Long-Term Incentive Plan
Award vesting period		2 years
Award vesting (as a percent)		50.00%
Restricted Stock Units | Employees
Long-Term Incentive Plan
Award expiration period	3 years
Restricted Stock Units | Employees | Tranche One
Long-Term Incentive Plan
Award vesting period	3 years
Award vesting (as a percent)	33.30%
Restricted Stock Units | Employees | Tranche Two
Long-Term Incentive Plan
Award vesting period	4 years
Award vesting (as a percent)	25.00%
Financial PSUs
Long-Term Incentive Plan
Award vesting (as a percent)	100.00%
Financial PSUs | Minimum
Long-Term Incentive Plan
Stock units granted that recipients receive as performance based restricted stock units (as a percent)	0.00%	0.00%
Financial PSUs | Maximum
Long-Term Incentive Plan
Stock units granted that recipients receive as performance based restricted stock units (as a percent)	200.00%	200.00%
TSR PSUs
Long-Term Incentive Plan
Award vesting period	3 years
Award vesting (as a percent)	100.00%
RSUs and PSUs
Long-Term Incentive Plan
Unrecognized compensation cost	$ 40.4
Weighted average recognition period	2 years
2015 LTIP
Long-Term Incentive Plan
Shares available for grant (shares)	14,100,000
2015 LTIP | Non-employee Director
Long-Term Incentive Plan
Award vesting period	1 year
2015 LTIP | Employee Stock Option | Former CEO
Long-Term Incentive Plan
Long-term incentive award stock option awards (as a percent)	20.00%	20.00%
2015 LTIP | Employee Stock Option | Non-employee Director
Long-Term Incentive Plan
Award expiration period	10 years
2015 LTIP | Restricted Stock Units | Executives Officers excluding CEO
Long-Term Incentive Plan
Long-term incentive award restricted stock units (as a percent)	40.00%	30.00%
2015 LTIP | Restricted Stock Units | Former CEO
Long-Term Incentive Plan
Long-term incentive award restricted stock units (as a percent)	20.00%	10.00%
2015 LTIP | Restricted Stock Units | Senior Vice Presidents
Long-Term Incentive Plan
Long-term incentive award restricted stock units (as a percent)	50.00%	50.00%
2015 LTIP | Financial PSUs
Long-Term Incentive Plan
Award vesting period	3 years
2015 LTIP | Financial PSUs | Executives Officers excluding CEO
Long-Term Incentive Plan
Long-term incentive award performance based restricted stock units (as a percent)	60.00%	50.00%
2015 LTIP | Financial PSUs | Former CEO
Long-Term Incentive Plan
Long-term incentive award performance based restricted stock units (as a percent)	60.00%	50.00%
2015 LTIP | Financial PSUs | Senior Vice Presidents
Long-Term Incentive Plan
Long-term incentive award performance based restricted stock units (as a percent)	50.00%	50.00%
2015 LTIP | TSR PSUs | Executives Officers excluding CEO
Long-Term Incentive Plan
Long-term incentive award performance based restricted stock units (as a percent)		20.00%
2015 LTIP | TSR PSUs | Former CEO
Long-Term Incentive Plan
Long-term incentive award performance based restricted stock units (as a percent)		20.00%

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