Restructuring - (Restructuring Plans) (Details) $ in Thousands			1 Months Ended	6 Months Ended	12 Months Ended
		Feb. 18, 2016 position	Dec. 31, 2015 USD ($) position	Jun. 30, 2015 position	Dec. 31, 2015 USD ($) position	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring	[1]				$ 100,411	$ 20,424	$ 0
2015 Other Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Number of full-time positions eliminated | position			350
Restructuring					29,732
2015 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Number of full-time positions eliminated | position				700
Restructuring					$ 68,900
2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Number of full-time positions eliminated | position					325
Restructuring costs since inception of the program			$ 22,200		$ 22,200
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring					76,629
Employee Severance [Member] | 2015 Other Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring					29,732
Employee Severance [Member] | 2015 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring					44,837
Employee Severance [Member] | 2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring					2,060
Minimum | Employee Severance [Member] | 2015 Other Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost			55,000		55,000
Maximum | Employee Severance [Member] | 2015 Other Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost			$ 60,000		$ 60,000
Scenario, Forecast | 2015 Other Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Number of full-time positions eliminated | position		700

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