2014 Reorganization and Restructuring (Details) - Reorganization And Restructuring 2014	3 Months Ended	6 Months Ended
	Dec. 31, 2014 USD ($) employees	Jun. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Positions eliminated across the global workforce | employees	1,700
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginining balance		$ 21,400,000
Expenses		300,000
Payments		(13,800,000)
Foreign currency exchange effects		(900,000)
Restructuring Reserve, ending balance	$ 21,400,000	7,000,000
Severance Costs
Restructuring Charges [Abstract]
Restructuring and Related Cost, Expected Cost Remaining		25,000,000
2014 Reorganization and Restructuring		400,000
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginining balance		21,400,000
Expenses		(400,000)
Payments		(13,300,000)
Foreign currency exchange effects		(900,000)
Restructuring Reserve, ending balance	21,400,000	6,800,000
Lease Terminations
Restructuring Charges [Abstract]
2014 Reorganization and Restructuring		(700,000)
Restructuring Reserve [Roll Forward]
Restructuring Reserve, beginining balance		0
Expenses		700,000
Payments		(500,000)
Foreign currency exchange effects		0
Restructuring Reserve, ending balance	$ 0	200,000
Reduced Direct Costs | Minimum
Restructuring Cost and Reserve [Line Items]
Annual direct costs saved		45,000,000
Reduced Direct Costs | Maximum
Restructuring Cost and Reserve [Line Items]
Annual direct costs saved		$ 50,000,000