Pension and Other Postretirement Benefits - Houghton and Cash Flow Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 6,310,000	$ 6,843,000
Acquired pension balance	55,967,000	25,809,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	10,000,000
Pension Plans, Defined Benefit [Member] | Cleveland Bakers and Teamsters Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Plan Liabilities	0		$ 592,000,000
Multiemployer Plans Plan Assets		315,000,000
Multiemployer Plans Plan Contributions	100,000
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$ 400,000
Other Current and Other Non-current Liabilities [Member] | Pension Plans, Defined Benefit [Member] | Cleveland Bakers and Teamsters Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plans Collective Bargaining Arrangement Expiration Date	May 01, 2022
Domestic plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 1,087,000	1,574,000
Acquired pension balance	33,173,000	9,319,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	2,700,000
Domestic plan [Member] | Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	384,000	317,000
Acquired pension balance	4,266,000	4,106,000
Foreign Plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	5,223,000	5,269,000
Acquired pension balance	22,794,000	$ 16,490,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	7,300,000
Houghton Foreign Plans [Member] | Foreign Plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	1,100,000
Houghton Foreign Plans [Member] | Foreign Plan [Member] | Other Current and Other Non-current Liabilities [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Acquired pension balance	$ (19,000,000.0)