Restructuring and Other Charges (Benefits) (Details) ft² in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) ft² right
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	$ 3,300,000	$ (4,100,000)	$ 208,500,000
Impairment of intangible assets	0
Restructuring and other charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	3,300,000	(600,000)	$ 167,000,000
Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Area subject to Restructuring Activities | ft²			0.4
Area subject to Sublease | ft²			0.1
Duration of sublease			2 years
Renewal Rights | right			1
Duration of renewal period			6 months
Deferred rent liability adjustment			$ 9,800,000
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	2,800,000	400,000	52,600,000
Severance [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)		400,000	52,000,000
Severance [Member] | BTI Systems, Inc [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	2,800,000
Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	500,000	(1,000,000)	14,400,000
Facilities [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)		(1,000,000)	14,200,000
Amount paid to Landlord			12,300,000
Transaction Fees			5,300,000
Asset impairments and write-down [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	0	(3,500,000)	139,200,000
Asset impairments and write-down [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)		(3,500,000)	12,300,000
Impairment charges related to licensed software [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)			85,400,000
Contract termination and other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)	$ 0	$ 0	2,300,000
Contract termination and other [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)			2,300,000
Inventory Write-down [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)			15,500,000
Intangible Asset Write-Down [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)			19,300,000
Acceleration of Certain End of Life Products [Member] | Restructuring Plan 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (benefits)			$ 6,700,000