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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 |  |  |

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