Pension and Postretirement Benefits (Plan Assets) (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Aug. 29, 2019
United States
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 425,792	$ 464,779
Return (loss) on plan assets	69,663	(21,414)
Company contributions	20,552	23,263
Benefits paid	(33,454)	(37,820)
Settlements	0	(3,016)
Ending balance	482,553	425,792
Fair Value	425,792	425,792
United States | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,778
Ending balance	4,994	4,778
Fair Value	4,778	4,778
United States | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	421,014
Ending balance	477,559	421,014
Fair Value	421,014	421,014
United States | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Cash and Cash Equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,778
Ending balance	4,994	4,778
Fair Value	4,778	4,778
United States | Cash and Cash Equivalents | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,778
Ending balance	4,994	4,778
Fair Value	4,778	4,778
United States | Cash and Cash Equivalents | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Cash and Cash Equivalents | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Global Equity
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	126,165
Ending balance	135,350	126,165
Fair Value	126,165	126,165
United States | Global Equity | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Global Equity | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	126,165
Ending balance	135,350	126,165
Fair Value	126,165	126,165
United States | Global Equity | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Global Real Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	55,046
Ending balance	60,523	55,046
Fair Value	55,046	55,046
United States | Global Real Assets | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Global Real Assets | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	55,046
Ending balance	60,523	55,046
Fair Value	55,046	55,046
United States | Global Real Assets | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Diversified Credit
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	55,039
Ending balance	56,375	55,039
Fair Value	55,039	55,039
United States | Diversified Credit | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Diversified Credit | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	55,039
Ending balance	56,375	55,039
Fair Value	55,039	55,039
United States | Diversified Credit | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Liability Driven Investment
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	184,764
Ending balance	225,311	184,764
Fair Value	184,764	184,764
United States | Liability Driven Investment | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States | Liability Driven Investment | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	184,764
Ending balance	225,311	184,764
Fair Value	184,764	184,764
United States | Liability Driven Investment | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	232,175	248,733
Return (loss) on plan assets	23,793	(580)
Company contributions	16,782	21,696
Benefits paid	(14,526)	(16,632)
Employee contributions	78	238
Settlements	(3,688)	(7,776)
Currency translation impact and other	7,945	(13,504)
Ending balance	262,559	232,175
Fair Value	262,559	248,733
Foreign Plan | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	15,105
Ending balance	5,026	15,105
Fair Value	15,105	15,105
Foreign Plan | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	180,186
Ending balance	187,742	180,186
Fair Value	180,186	180,186
Foreign Plan | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	36,884
Ending balance	69,791	36,884
Fair Value	36,884	36,884
Foreign Plan | Cash and Cash Equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	15,105
Ending balance	5,026	15,105
Fair Value	15,105	15,105
Foreign Plan | Cash and Cash Equivalents | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	15,105
Ending balance	5,026	15,105
Fair Value	15,105	15,105
Foreign Plan | Cash and Cash Equivalents | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Cash and Cash Equivalents | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Global Equity
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,648
Ending balance	2,411	4,648
Fair Value	4,648	4,648
Foreign Plan | Global Equity | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Global Equity | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,648
Ending balance	2,411	4,648
Fair Value	4,648	4,648
Foreign Plan | Global Equity | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | North American Companies
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	6,603
Ending balance	2,501	6,603
Fair Value	6,603	6,603
Foreign Plan | North American Companies | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | North American Companies | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	6,603
Ending balance	2,501	6,603
Fair Value	6,603	6,603
Foreign Plan | North American Companies | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | U.K. Government Gilt Index
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	99,482
Ending balance	113,855	99,482
Fair Value	99,482	99,482
Foreign Plan | U.K. Government Gilt Index | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | U.K. Government Gilt Index | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	99,482
Ending balance	113,855	99,482
Fair Value	99,482	99,482
Foreign Plan | U.K. Government Gilt Index | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | U.K. Corporate Bond Index
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,192
Ending balance	0	1,192
Fair Value	1,192	1,192
Foreign Plan | U.K. Corporate Bond Index | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | U.K. Corporate Bond Index | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,192
Ending balance	0	1,192
Fair Value	1,192	1,192
Foreign Plan | U.K. Corporate Bond Index | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Global Index Income Bond
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,110
Ending balance	0	4,110
Fair Value	4,110	4,110
Foreign Plan | Global Index Income Bond | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Global Index Income Bond | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,110
Ending balance	0	4,110
Fair Value	4,110	4,110
Foreign Plan | Global Index Income Bond | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Liability Driven Investment
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	20,004
Ending balance	20,011	20,004
Fair Value	20,004	20,004
Foreign Plan | Liability Driven Investment | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Liability Driven Investment | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	20,004
Ending balance	20,011	20,004
Fair Value	20,004	20,004
Foreign Plan | Liability Driven Investment | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Multi-Asset Category
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	44,147
Ending balance	48,964	44,147
Fair Value	44,147	44,147
Foreign Plan | Multi-Asset Category | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Multi-Asset Category | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	44,147
Ending balance	48,964	44,147
Fair Value	44,147	44,147
Foreign Plan | Multi-Asset Category | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	23,616
Ending balance	54,544	23,616
Fair Value	23,616	23,616
Foreign Plan | Buy-in Contracts | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Buy-in Contracts | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Buy-in Contracts | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	54,544
Fair Value	54,544
Foreign Plan | Other types
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	13,268
Ending balance	15,247	13,268
Fair Value	13,268	13,268
Foreign Plan | Other types | Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Other types | Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan | Other types | Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	13,268
Ending balance	15,247	13,268
Fair Value	13,268	13,268
Netherlands | Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	23,600
Ending balance	25,900	23,600
Fair Value	25,900	$ 23,600
United Kingdom | Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	28,600
Fair Value	$ 28,600		$ 27,400