Pension, Post-Retirement and Post-Employment Plans - Expected Future Benefit Payments (Details)	Dec. 31, 2018 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	$ 14,400,000
2020	14,200,000
2021	14,300,000
2022	14,600,000
2023	15,100,000
Subsequent five years	74,900,000
Total	147,500,000
Company's expected future contribution to the plan	0
Pension Plan and SERP | Domestic
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	12,100,000
2020	12,200,000
2021	12,100,000
2022	12,600,000
2023	12,700,000
Subsequent five years	64,300,000
Total	126,000,000.0
Pension Plan and SERP | Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	1,700,000
2020	1,400,000
2021	1,600,000
2022	1,400,000
2023	1,800,000
Subsequent five years	7,600,000
Total	15,500,000
Post-retirement Medical Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2019	600,000
2020	600,000
2021	600,000
2022	600,000
2023	600,000
Subsequent five years	3,000,000.0
Total	$ 6,000,000.0