Retirement and Other Postretirement Benefit Plans - Schedule of Pension Assets Measured at Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	$ 231.4	$ 233.8
Diversified Growth Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		69.0
Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		17.2
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	218.0	94.9
Liability Driven Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		48.0
Index Linked Gilts
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	1.2
Diversified Investment, Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	10.2	2.5
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.0	2.2
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.0	2.2
Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.0	2.2
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	9.1	134.2
Level 2 | Diversified Growth Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		69.0
Level 2 | Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		17.2
Level 2 | Liability Driven Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		48.0
Level 2 | Index Linked Gilts
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	1.2
Level 2 | Diversified Investment, Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	7.9
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	220.3	97.4	$ 6.8
Actual return on plan assets	(12.6)	0.3
Purchases, sales and settlements	138.9	88.2
Currency translation adjustments	(3.4)	2.1
Level 3 | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	218.0	94.9	4.4
Actual return on plan assets	(12.7)	0.2
Purchases, sales and settlements	139.1	88.4
Currency translation adjustments	(3.3)	1.9
Level 3 | Diversified Investment, Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.3	2.5	$ 2.4
Actual return on plan assets	0.1	0.1
Purchases, sales and settlements	(0.2)	(0.2)
Currency translation adjustments	$ (0.1)	$ 0.2