Pension Benefits and Postretirement Benefits Other Than Pensions - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) employees	Sep. 30, 2023 USD ($)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Number of participants and beneficiaries | employees	3,100
Percentage of compensation (as a percent)		3.00%
Payments to participants of pension plan	$ 90.0
Contract purchase amount	205.7	$ 205.7
Noncash settlement charge	70.2
Net assets of pension plan	16.0	$ 16.0
Noncash settlement charge, after tax	$ 55.5
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Number of retired employees covered | employees	300
Number of active employees covered | employees	500