Summary of Accounting Policies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) ReportingUnit shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2007 USD ($)
Summary of Accounting Policies [Abstract]
Cost Method Investments	$ 2.0			$ 11.5
Cost-method Investments, Other than Temporary Impairment	9.5
Retrospective effect of adoption of ASU on debt issuance costs on balance sheet		$ 13.0
Allowance for doubtful accounts and sales allowances	12.4	13.7
Cash Equivalents, at Carrying Value	$ 0.0	$ 40.0
Basic weighted-average shares outstanding (in shares) | shares	100,616,000	99,916,000	99,123,000
Effect of potential common stock
Common stock awards (in shares) | shares	887,000	816,000	891,000
Senior subordinated convertible notes (in shares) | shares	94,000	152,000	195,000
Diluted shares outstanding (in shares) | shares	101,597,000	100,884,000	100,209,000
Antidilutive stock options (in shares) | shares	618,220	764,333	614,850
Foreign Currency Transaction Gain (Loss), before Tax	$ (0.7)	$ 0.2	$ (3.9)
Total goodwill reporting units | ReportingUnit	32
Minimum carrying value of goodwill	$ 0.0
Maximum carrying value of goodwill	1,175.0
The approximate amount of earnings of foreign subsidiaries	1,250.0
Property, Plant and Equipment [Line Items]
Research and development costs	164.2	147.9	145.7
Contract revenue recognized under the percentage-of-completion method	253.0	266.0	$ 205.0
Capitalized software	$ 4.6	$ 4.7
Buildings [Member] | Earliest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings [Member] | Latest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Machinery and equipment [Member] | Earliest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Machinery and equipment [Member] | Latest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Office Equipment [Member] | Earliest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Office Equipment [Member] | Latest [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years