Acquisitions (Details) - USD ($) $ in Millions | 6 Months Ended | 9 Months Ended | | |
Jun. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Sep. 01, 2015 |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 63.9 | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | 13.3 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 48.5 | | | |
Business Acquisition Purchase Price Allocation Other Current Assets | 1.1 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 37.9 | | | |
Business Combination Purchase Price Allocation Goodwill Amount | 71.5 | | | |
Business Combination Adjusted Purchase Price Allocation Goodwill Amount [Line Items] | 328.7 | | $ 327.3 | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 63.9 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 236.2 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable | 10.2 | | | |
Business Combination Purchase Price Allocation Current Liabilities Accrued Liabilities | 1.1 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other | 1.3 | | | |
Business Combination Pension Liability | 2.3 | | | |
business combination postretirement liability assumed | 1.1 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other | 5.9 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 21.9 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 214.3 | | | |
Technology-Based Intangible Assets [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 17.1 | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 20 years | | | |
Computer Software, Intangible Asset [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 1.2 | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 3 years | | | |
Trade Names [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 1.7 | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 11 years | | | |
Customer Relationships [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 43.9 | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 20 years | | | |
Acquisition-related Costs [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | | | | $ 13.3 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | | | | 48.5 |
Business Acquisition Purchase Price Allocation Other Current Assets | | | | 1.1 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | | | | 37.9 |
Business Combination Purchase Price Allocation Goodwill Amount | | | | 70.8 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | | | | 63.9 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | | | | 235.5 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable | | | | 10.2 |
Business Combination Purchase Price Allocation Current Liabilities Accrued Liabilities | | | | 1.1 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other | | | | 1.3 |
Business Combination Pension Liability | | | | 2.3 |
business combination postretirement liability assumed | | | | 1.1 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other | | | | 5.9 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | | | | 21.9 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | | | | 213.6 |
Carlstar [Member] | | | | |
Business Acquisition [Line Items] | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | | | | $ 0.1 |
Business Combination Adjusted Purchase Price Allocation Goodwill Amount [Line Items] | $ 0.7 | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | $ 0 | | | |