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Project Summit - Restructuring Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Restructuring Reserve [Roll Forward]
Amounts accrued	$ 48,371	$ 0	$ 128,715	$ 0	$ 177,312
Project Summit costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019			17,777
Amounts accrued			128,715
Payments			(97,646)
Other, including currency translation adjustments			(3,604)
Balance as of September 30, 2020	45,242		45,242		45,242
Accrued professional fees \| Project Summit costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019			13,000
Balance as of September 30, 2020	33,400		33,400		33,400
Accrued employee severance costs \| Project Summit costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019			4,800
Balance as of September 30, 2020	$ 11,800		$ 11,800		$ 11,800