Other Comprehensive Income (Loss) - Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss (gain) on sale of businesses - net									$ 0	$ 0	$ (9,273)
Other (income) expense - net									1,759	(3,985)	2,394
Interest expense									44,341	44,134	44,889
Total before tax									(532,903)	(528,939)	(455,273)
Provision for income taxes									107,382	118,366	118,016
Total net of tax	$ (96,850)	$ (105,194)	$ (113,209)	$ (110,268)	$ (98,137)	$ (106,352)	$ (107,126)	$ (98,958)	(425,521)	(410,573)	(337,257)
Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss (gain) on sale of businesses - net									0	0	2,749
Total before tax									0	0	2,749
Provision for income taxes									0	0	0
Total net of tax									0	0	2,749
Reclassification out of Accumulated Other Comprehensive Income | Retirement Benefits Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									2,810	2,938	3,814
Provision for income taxes									(944)	(701)	(589)
Total net of tax									1,866	2,237	3,225
Reclassification out of Accumulated Other Comprehensive Income | Amortization/recognition of settlement loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense - net									2,858	3,246	3,580
Reclassification out of Accumulated Other Comprehensive Income | Recognition of settlement loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense - net									(48)	(308)	234
Reclassification out of Accumulated Other Comprehensive Income | Cumulative Unrealized Gain (Loss) on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense									6,327	6,475	6,655
Total before tax									6,327	6,475	6,655
Provision for income taxes									(1,445)	(1,469)	(2,445)
Total net of tax									$ 4,882	$ 5,006	$ 4,210