Restructuring - (Restructuring Plans) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring	[1]	$ 71,122	$ 100,411	$ 20,424
November 2015 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring		45,500	29,700
Restructuring costs since inception of the program		75,200
January 2015 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring		24,000	$ 68,900
Restructuring costs since inception of the program		$ 92,900

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.