Restructuring Expected Costs - 2016 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
2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	51,009		51,009
Restructuring and Related Cost, Cost Incurred to Date					$ 53,272
Restructuring			(2,963)
Remaining Costs to be Recognized at Period End	700		700
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			1,230
Employee Severance [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	36,910		36,910
Restructuring and Related Cost, Cost Incurred to Date					35,845
Restructuring			1,065
Remaining Costs to be Recognized at Period End	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] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	(68)		(68)
Restructuring and Related Cost, Cost Incurred to Date					5,664
Restructuring			(5,732)
Remaining Costs to be Recognized at Period End	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			8,602
Other Restructuring [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	14,167		14,167
Restructuring and Related Cost, Cost Incurred to Date					$ 11,763
Restructuring			1,704
Remaining Costs to be Recognized at Period End	700		$ 700
Stretford [Member]
Restructuring Cost and Reserve [Line Items]
Gain (Loss) on Sale of Properties	$ 5,400