Employee Benefits - Schedule of Pension Assets at Fair Value Hierarchy Level (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	$ 487.9	$ 767.4	$ 1,190.7
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	487.9	767.4
Fair Value, Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	118.7	124.7
Fair Value, Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	96.7	272.8
Fair Value, Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	27.3	26.6	$ 45.3
Fair Value, Measurements, Recurring | Equities
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	2.5	59.0
Fair Value, Measurements, Recurring | Equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	2.5	59.0
Fair Value, Measurements, Recurring | Private Equities
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	19.1	18.6
Fair Value, Measurements, Recurring | Private Equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	19.1	18.6
Fair Value, Measurements, Recurring | Corporate and Other
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	8.2	81.4
Fair Value, Measurements, Recurring | Corporate and Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value		73.4
Fair Value, Measurements, Recurring | Corporate and Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	8.2	8.0
Fair Value, Measurements, Recurring | Government
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	158.7	206.2
Fair Value, Measurements, Recurring | Government | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	63.2	8.2
Fair Value, Measurements, Recurring | Government | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	95.5	198.0
Fair Value, Measurements, Recurring | Interest Bearing
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	54.2	58.9
Fair Value, Measurements, Recurring | Interest Bearing | Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	53.0	57.5
Fair Value, Measurements, Recurring | Interest Bearing | Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	1.2	1.4
Fair Value, Measurements, Recurring | Investments Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Pension assets at fair value	$ 245.2	$ 343.3