Restructuring - Rollforward of Restructuring Liability (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Liability as of January 1, 2020	$ 78,831
Restructuring costs	39,009
Cash payments	(79,480)
Non-cash charges	(12,865)
Translation	144
Liability as of September 30, 2020	25,639
Severance and other employee costs
Restructuring Reserve [Roll Forward]
Liability as of January 1, 2020	72,192
Restructuring costs	16,638
Cash payments	(71,389)
Non-cash charges	0
Translation	85
Liability as of September 30, 2020	17,526
Facility and closure costs
Restructuring Reserve [Roll Forward]
Liability as of January 1, 2020	6,639
Restructuring costs	9,506
Cash payments	(8,091)
Non-cash charges	0
Translation	59
Liability as of September 30, 2020	8,113
Accelerated operating lease costs
Restructuring Reserve [Roll Forward]
Liability as of January 1, 2020	0
Restructuring costs	5,890
Cash payments	0
Non-cash charges	(5,890)
Translation	0
Liability as of September 30, 2020	0
Asset impairments
Restructuring Reserve [Roll Forward]
Liability as of January 1, 2020	0
Restructuring costs	6,975
Cash payments	0
Non-cash charges	(6,975)
Translation	0
Liability as of September 30, 2020	$ 0