Employees, Retirement and Incentive Plans - Retirement and Benefit Plan Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) plan component shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retirement and benefit costs	$ 11.2	$ 8.7	$ 7.9
Retirement costs	$ 4.9	3.7	3.4
Number of long-term incentive plan components | component	5
Number of incentive-based award plans | plan	2
Compensation costs	$ 1.9	$ 2.6	$ 2.2
Long-term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units authorized to be granted (in shares) | shares	2,500,000
Units not yet granted (in shares) | shares	773,014