Restructuring Restructuring Expected Costs - 2018 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring	$ (6,169)	$ (5,623)	$ 1,093	$ 82,242
2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	97,870		97,870
Restructuring and Related Cost, Cost Incurred to Date					$ 78,123
Restructuring			4,457
Restructuring and Related Cost, Expected Cost Remaining	15,290		15,290
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			(605)
Employee Severance [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	72,735		72,735
Restructuring and Related Cost, Cost Incurred to Date					73,778
Restructuring			(1,043)
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			(5,295)
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	231		231
Restructuring and Related Cost, Cost Incurred to Date					117
Restructuring			114
Restructuring and Related Cost, Expected Cost Remaining	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			6,993
Other Restructuring [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	24,904		24,904
Restructuring and Related Cost, Cost Incurred to Date					$ 4,228
Restructuring			5,386
Restructuring and Related Cost, Expected Cost Remaining	$ 15,290		$ 15,290