Benefit Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
401 (k) plan contributions	$ 16,800,000	$ 15,600,000	$ 6,500,000
Employer contribution	0	2,600,000
Fair value of plan assets	258,100,000	244,100,000
Accumulated benefit obligation	293,900,000	283,900,000
Expected contribution to the plan	$ 3,600,000
Assumed healthcare cost trend rate, benefit obligation	6.50%
Ultimate healthcare cost trend rate, benefit obligation	5.00%
Assumed healthcare cost trend rate, net periodic benefit cost	6.25%
Ultimate healthcare cost trend rate, net periodic benefit cost	5.00%
Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 3,700,000	$ 3,500,000
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	3.35%
Rate of compensation increase			4.25%
Percentage of global plan assets	83.00%
Expected long-term rate of return on assets	5.10%	5.60%	7.00%
International plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 43,900,000	$ 39,400,000
Accumulated benefit obligation	83,100,000	$ 73,900,000
Expected contribution to the plan	$ 2,900,000
Discount rate	0.89%	1.28%
Rate of compensation increase	2.58%	2.49%
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ (3,700,000)	$ (3,500,000)	$ 0
Fair value of plan assets	$ 258,100,000	$ 244,100,000	$ 214,500,000
Discount rate	2.10%	2.79%
Rate of compensation increase	2.58%	2.49%
Expected long-term rate of return on assets	5.10%	5.54%	6.71%
Other retirement benefits
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 0	$ 0	$ 0
Fair value of plan assets	0	$ 0	$ 0
Expected contribution to the plan	$ 700,000
Discount rate	2.30%	4.20%