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Employee Benefit Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total underfunded status	$ 132,700,000
Expected company contribution in the current period	$ 17,300,000
Employer contribution as percentage of employee contribution	100.00%
Annual contribution limit per employee	$ 11,200
Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Assets of foreign plans investment in equity securities	21.00%	18.00%
Debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Assets of foreign plans investment in equity securities	19.00%	19.00%
Insurance and Investment Contracts
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Assets of foreign plans investment in equity securities	43.00%	46.00%
Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Assets of foreign plans investment in equity securities	3.00%	3.00%
Other Investments
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Assets of foreign plans investment in equity securities	14.00%	14.00%
United States
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Compensation expense recognized	$ 18,100,000	$ 19,200,000	$ 18,400,000
Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Compensation expense recognized	$ 20,600,000	$ 20,500,000	$ 16,800,000
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Percentage of employee contribution, basis for employer contribution	0.00%
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Percentage of employee contribution, basis for employer contribution	4.00%

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Defined benefit plan, percentage of employee contribution, basis for employer contribution

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Amount of cost for defined contribution plan.

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-SubTopic 70
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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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