Restructuring Restructuring Expected Costs - 2018 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 6,592	$ 666	$ 7,685	$ 82,908
2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	101,771		101,771
Restructuring and Related Cost, Cost Incurred to Date					$ 78,123
Restructuring			10,648
Restructuring and Related Cost, Expected Cost Remaining	13,000		13,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			1,230
Employee Severance [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	73,943		73,943
Restructuring and Related Cost, Cost Incurred to Date					73,778
Restructuring			165
Restructuring and Related Cost, Expected Cost Remaining	0		0
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			(2,147)
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3,702		3,702
Restructuring and Related Cost, Cost Incurred to Date					117
Restructuring			3,585
Restructuring and Related Cost, Expected Cost Remaining	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			8,602
Other Restructuring [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	24,126		24,126
Restructuring and Related Cost, Cost Incurred to Date					$ 4,228
Restructuring			6,898
Restructuring and Related Cost, Expected Cost Remaining	$ 13,000		$ 13,000