Retirement and Other Postretirement Benefit Plans - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Defined Benefit Retirement Plans
Amounts recognized on the balance sheet:
Amounts unrelated to service costs, benefit	$ 800,000	$ 1,000,000.0	$ 2,500,000	$ 3,000,000.0
Defined Benefit Retirement Plans | U.S.
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans			500,000	4,400,000
Expected employer contribution in full current year	$ 900,000		$ 900,000
Net amortization gain deferral		$ (100,000)		$ (100,000)
Defined Benefit Plan, Tax Status [Extensible List]	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember
Defined Benefit Retirement Plans | European
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans			$ 3,300,000	$ 3,800,000
Expected employer contribution in full current year	$ 5,000,000.0		5,000,000.0
Net amortization gain deferral			(200,000)	(200,000)
Postretirement Health Care and Life Insurance Benefit Plans
Amounts recognized on the balance sheet:
Net amortization gain deferral	200,000	$ 0	700,000	$ 900,000
Postretirement Health Care and Life Insurance Benefit Plans | Maximum
Amounts recognized on the balance sheet:
Expected employer contribution in full current year	$ 500,000		$ 500,000