Restructuring Restructuring Expected Costs - 2018 Projects (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 7,262	$ 87,865
2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	99,095
Restructuring and Related Cost, Cost Incurred to Date			$ 78,123
Restructuring	5,632
Restructuring and Related Cost, Expected Cost Remaining	15,340
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	2,224
Employee Severance [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	75,573
Restructuring and Related Cost, Cost Incurred to Date			73,778
Restructuring	1,795
Restructuring and Related Cost, Expected Cost Remaining	0
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	96
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	218
Restructuring and Related Cost, Cost Incurred to Date			117
Restructuring	101
Restructuring and Related Cost, Expected Cost Remaining	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	4,942
Other Restructuring [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	23,304
Restructuring and Related Cost, Cost Incurred to Date			$ 4,228
Restructuring	3,736
Restructuring and Related Cost, Expected Cost Remaining	$ 15,340