Retirement Benefits - Narrative (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($) benefit_plan	Sep. 30, 2018 USD ($) benefit_plan	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) benefit_plan	Dec. 31, 2018 USD ($) benefit_plan	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of foreign plans amended | benefit_plan		1
Accumulated benefit obligation	$ 933,500,000				$ 933,500,000	$ 835,600,000
Number of defined contribution pension plans (benefit plan) | benefit_plan	5				5
Defined contribution pension plans, total costs					$ 23,400,000	$ 22,500,000	$ 19,800,000
Number of multiemployer defined benefit pension plans (benefit_plan) | benefit_plan	1				1	1
Multiemployer plan total employer contributions					$ 200,000	$ 200,000	400,000
Pre-tax restructuring costs					32,000,000.0	12,000,000.0	20,300,000
Settlement of multi-employer pension plan	$ 10,000,000.0
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	938,700,000				$ 938,700,000	$ 844,300,000	$ 956,100,000
Settlement of multi-employer pension plan	$ 10,000,000.0
Discount rate	3.17%				3.17%	4.24%	3.67%
Employer contributions					$ 10,400,000
United States | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)					$ (300,000)
Projected benefit obligation settled						$ 28,000,000
Defined benefit obligation per plan, as a percent of total benefit obligation					88.00%
Discount rate	3.30%				3.30%	4.40%
Voluntary contributions					$ 10,000,000.0
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)		$ 4,700,000
Foreign Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	$ 4,300,000				$ 4,300,000
Canada | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.00%				3.00%	3.60%
United Kingdom | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.10%				2.10%	2.90%
Withdrawal from Multiemployer Defined Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Pre-tax restructuring costs					$ 8,500,000			$ 12,500,000
Company Stock
Defined Benefit Plan Disclosure [Line Items]
Employer stock included in plan assets						$ 0
Company Stock | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer stock included in plan assets	$ 0				$ 0
Forecast | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement of multi-employer pension plan			$ 5,000,000.0	$ 6,000,000.0