Employee Benefit Plans and Other Postretirement Benefits - Schedule of Fair Value Measurements of Plan Assets by Major Asset Category (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets at plan year end		$ 267.2	$ 1,100.0
Pension Plans
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets at plan year end		1,161.6	1,055.3	$ 1,382.7
Pension Plans | Accrued Expenses and Receivables
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets at plan year end		5.3	(4.0)
Pension Plans | Defined Benefit Plan, Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		12.2	9.9
Pension Plans | International equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		179.8	132.6
Pension Plans | Domestic equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		130.4	98.2
Pension Plans | Corporate Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		362.2	338.5
Pension Plans | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		297.5	167.1
Pension Plans | Fixed Income Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		160.7	282.6
Pension Plans | Municipal Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		12.7	21.4
Pension Plans | Private Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.8	1.0
Pension Plans | Total Securities at Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		1,156.3	1,051.3
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Defined Benefit Plan, Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | International equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		96.4	73.3
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Domestic equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Corporate Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Fixed Income Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Municipal Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Private Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Quoted prices in active markets for identical assets (Level 1) | Total Securities at Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		96.4	73.3
Pension Plans | Significant other observable inputs (Level 2) | Defined Benefit Plan, Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		12.2	9.9
Pension Plans | Significant other observable inputs (Level 2) | International equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		53.7	42.4
Pension Plans | Significant other observable inputs (Level 2) | Domestic equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		130.4	98.2
Pension Plans | Significant other observable inputs (Level 2) | Corporate Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		362.2	338.5
Pension Plans | Significant other observable inputs (Level 2) | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		297.5	167.1
Pension Plans | Significant other observable inputs (Level 2) | Fixed Income Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		160.7	282.6
Pension Plans | Significant other observable inputs (Level 2) | Municipal Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		12.7	21.4
Pension Plans | Significant other observable inputs (Level 2) | Private Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant other observable inputs (Level 2) | Total Securities at Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		1,029.4	960.1
Pension Plans | Significant unobservable input (Level 3) | Defined Benefit Plan, Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | International equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | Domestic equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | Corporate Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | Fixed Income Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | Municipal Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0
Pension Plans | Significant unobservable input (Level 3) | Private Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Significant unobservable input (Level 3) | Total Securities at Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets		0.0	0.0
Pension Plans | Net Asset Value (NAV) | Defined Benefit Plan, Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0	0.0
Pension Plans | Net Asset Value (NAV) | International equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	29.7	16.9
Pension Plans | Net Asset Value (NAV) | Domestic equities (Common/Collective Trust Funds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0	0.0
Pension Plans | Net Asset Value (NAV) | Corporate Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0	0.0
Pension Plans | Net Asset Value (NAV) | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0	0.0
Pension Plans | Net Asset Value (NAV) | Fixed Income Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0	0.0
Pension Plans | Net Asset Value (NAV) | Municipal Bonds (Corporate and Government Bonds)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.0
Pension Plans | Net Asset Value (NAV) | Private Equity Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	0.8	1.0
Pension Plans | Net Asset Value (NAV) | Total Securities at Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total fair value of plan assets	[1]	$ 30.5	$ 17.9

[1] In accordance with ASC 820, Fair Value Measurement, certain investments that do not have readily determinable fair values are measured at fair value using the net asset value (NAV) per share practical expedient and are not classified within the fair value hierarchy.