Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	$ (1.9)	$ 72.0	$ (0.5)	$ 194.4
Restructuring charges			(0.5)	84.7
Restructuring reserve	4.3		17.0
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period			17.0
Charges			(0.5)	84.7
Cash Payments			(10.1)
Non-cash Settlements and Other			(2.1)
Restructuring reserve, end of period	4.3		4.3
Cost of Revenues [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	0.0	13.8	0.0	22.2
Operating expense [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	(1.9)	58.2	(0.5)	172.2
Severance [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	(1.1)	10.2	0.4	38.5
Restructuring charges			0.4
Restructuring reserve	0.5		9.4
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period			9.4
Charges			0.4
Cash Payments			(7.8)
Non-cash Settlements and Other			(1.5)
Restructuring reserve, end of period	0.5		0.5
Severance [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges	(1.1)	9.9	0.4	37.9
Restructuring Reserve [Roll Forward]
Charges	(1.1)	9.9	0.4	37.9
Facilities [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	(0.8)	37.6	(0.9)	37.8
Restructuring charges			(0.9)
Restructuring reserve	3.8		7.4
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period			7.4
Charges			(0.9)
Cash Payments			(2.3)
Non-cash Settlements and Other			(0.4)
Restructuring reserve, end of period	3.8		3.8
Facilities [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges	(0.8)	37.6	(0.9)	37.6
Restructuring Reserve [Roll Forward]
Charges	(0.8)	37.6	(0.9)	37.6
Asset Write-Down [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges		8.9		8.9
Restructuring Reserve [Roll Forward]
Charges		8.9		8.9
Contract terminations [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	0.0	1.5	0.0	2.3
Restructuring charges			0.0
Restructuring reserve	0.0		0.2
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period			0.2
Charges			0.0
Cash Payments			0.0
Non-cash Settlements and Other			(0.2)
Restructuring reserve, end of period	0.0		0.0
Contract terminations [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges		1.5		2.3
Restructuring Reserve [Roll Forward]
Charges		1.5		2.3
Asset impairment and write-downs [Member]
Restructuring Reserve [Line Items]
Restructuring and other (benefit) charges	0.0	22.7	0.0	115.8
Asset impairment and write-downs [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges		0.3		0.8
Restructuring Reserve [Roll Forward]
Charges		0.3		0.8
Employee Severance and Contract Terminations [Member]
Restructuring Reserve [Line Items]
Restructuring reserve	0.5		0.5
Restructuring Reserve [Roll Forward]
Restructuring reserve, end of period	$ 0.5		$ 0.5
Inventory Write-down [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges		11.5		15.5
Restructuring Reserve [Roll Forward]
Charges		11.5		15.5
Acceleration of Certain End of Life Products [Member] | Restructuring Plan 2014 [Member]
Restructuring Reserve [Line Items]
Restructuring charges		2.3		6.7
Restructuring Reserve [Roll Forward]
Charges		$ 2.3		$ 6.7