Segment Information - Revenue and Long-Lived Assets by Geography (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) segments	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Reportable Segments | segments									4
Revenue	$ 1,694,600	$ 1,787,582	$ 1,758,628	$ 1,715,501	$ 1,977,947	$ 2,009,575	$ 1,962,636	$ 1,802,570	$ 6,956,311	$ 7,752,728	$ 7,155,096
Property, Plant and Equipment, Net	854,269				837,069				854,269	837,069
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									4,270,061	4,617,813	4,202,434
Property, Plant and Equipment, Net	622,892				599,688				622,892	599,688
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,059,413	1,251,625	1,112,279
Property, Plant and Equipment, Net	150,950				136,599				150,950	136,599
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									637,533	794,966	803,741
Property, Plant and Equipment, Net	32,137				39,971				32,137	39,971
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									626,761	686,511	607,873
Property, Plant and Equipment, Net	38,826				42,775				38,826	42,775
Other Geographical Area [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									362,543	401,813	$ 428,769
Property, Plant and Equipment, Net	$ 9,464				$ 18,036				$ 9,464	$ 18,036