Stockholder's Equity (Reclassification out of Other Comprehensive Income) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income
Revenue		$ 1,091.2	$ 1,545.0	$ 3,450.2	$ 4,935.4
Selling, general and administrative expense		(132.9)	(144.3)	(430.0)	(482.6)
Research and development expense		(23.3)	(25.9)	(89.5)	(91.7)
Net interest expense		(7.7)	(8.1)	(22.8)	(24.4)
Income from continuing operations before income taxes		36.5	102.0	72.2	450.9
Provision (benefit) for income taxes		9.5	(19.5)	(9.0)	(112.3)
Net income		32.0	82.5	49.2	338.6
Reclassification out of Accumulated Other Comprehensive Income | Hedging | Foreign Exchange Contract
Reclassification out of Accumulated Other Comprehensive Income
Revenue		(15.9)	(29.9)	(67.5)	(91.6)
Cost of sales		(1.1)	17.8	14.1	36.8
Selling, general and administrative expense			(0.4)		(1.3)
Research and development expense		(0.4)	0.1	(0.4)
Net interest expense			(1.8)		0.1
Income from continuing operations before income taxes		(17.4)	(14.2)	(53.8)	(56.0)
Provision (benefit) for income taxes		4.1	2.7	12.1	11.4
Net income		(13.3)	(11.5)	(41.7)	(44.6)
Reclassification out of Accumulated Other Comprehensive Income | Defined Pension and Other Post-retirement Benefits
Reclassification out of Accumulated Other Comprehensive Income
Amortization of actuarial gain (loss)	[1]	(6.2)	(7.7)	(18.6)	(23.3)
Amortization of prior service credit (cost)	[1]	(0.1)		(0.5)	(0.1)
Settlement cost	[1]	(1.8)	(2.0)	(1.8)	(2.0)
Income from continuing operations before income taxes		(8.1)	(9.7)	(20.9)	(25.4)
Provision (benefit) for income taxes		2.6	3.2	6.5	8.2
Net income		$ (5.5)	$ (6.5)	$ (14.4)	$ (17.2)

[1] (a) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 14 for additional details).