Restructuring - Rollforward of Restructuring Liability (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 78,831
Restructuring costs	50,019
Cash payments	(85,610)
Non-cash charges	(12,967)
Translation	1,254
Restructuring reserve, ending balance	31,527
Severance and other employee costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	72,192
Restructuring costs	20,631
Cash payments	(72,365)
Non-cash charges	0
Translation	936
Restructuring reserve, ending balance	21,394
Facility and closure costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	6,639
Restructuring costs	16,421
Cash payments	(13,245)
Non-cash charges	0
Translation	318
Restructuring reserve, ending balance	10,133
Accelerated operating lease costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0
Restructuring costs	6,724
Cash payments	0
Non-cash charges	(6,724)
Translation	0
Restructuring reserve, ending balance	0
Asset impairments
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0
Restructuring costs	6,243
Cash payments	0
Non-cash charges	(6,243)
Translation
Restructuring reserve, ending balance	$ 0