Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) | May 31, 2019 | Feb. 01, 2019 | Jul. 12, 2018 | Jan. 26, 2018 | Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Dec. 31, 2018 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | | $ 84.9 | | | | | | | |
Inventories | | 56.4 | | | | | | | |
Property, plant and equipment | | 37.8 | | | | | | | |
Other intangible assets | | 161.5 | | | | | | | |
Deferred tax liabilities | | (23.6) | | | | | | | |
Financial liabilities | | (87.1) | | | | | | | |
Total identifiable net assets | | 229.9 | | | | | | | |
Cash consideration paid | | 439.7 | | | | | | | |
Contingent consideration | | 16 | | | $ 15,800,000 | $ 15,800,000 | | $ 15,800,000 | |
Holdback payment due to seller | | 0.9 | | | | | | | |
Total consideration | | 456.6 | | | | | | | |
Cash acquired | | 13.8 | | | | | | | |
Net consideration | | 442.8 | | | | 368,400,000 | $ 57,600,000 | 442,800,000 | |
Goodwill | | 226.7 | | | 516,900,000 | 516,900,000 | | 516,900,000 | $ 321,400,000 |
Goodwill expected to be tax deductible | | | | | 34,800,000 | $ 34,800,000 | | 34,800,000 | |
Minimum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Intangible assets useful lives | | | | | | 7 years | | | |
Maximum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Intangible assets useful lives | | | | | | 20 years | | | |
Customer Relationships | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Other intangible assets | | | | | 86,000,000 | $ 86,000,000 | | 86,000,000 | |
Intangible assets useful lives | | | | | | 14 years | | | |
Technology-Based Intangible Assets | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Other intangible assets | | | | | 37,600,000 | $ 37,600,000 | | 37,600,000 | |
Intangible assets useful lives | | | | | | 9 years | | | |
Trade Names | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Other intangible assets | | | | | 14,700,000 | $ 14,700,000 | | 14,700,000 | |
Intangible assets useful lives | | | | | | 20 years | | | |
Proseal | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | $ 45,900,000 | | | | | | | | |
Inventories | 26,200,000 | | | | | | | | |
Property, plant and equipment | 24,700,000 | | | | | | | | |
Other intangible assets | 90,500,000 | | | | | | | | |
Deferred tax liabilities | (15,600,000) | | | | | | | | |
Financial liabilities | (35,100,000) | | | | | | | | |
Total identifiable net assets | 136,600,000 | | | | | | | | |
Cash consideration paid | 264,900,000 | | | | | | | | |
Contingent consideration | 14,700,000 | | | | | | | | |
Holdback payment due to seller | 0 | | | | | | | | |
Total consideration | 279,600,000 | | | | | | | | |
Cash acquired | 4,300,000 | | | | | | | | |
Net consideration | 275,300,000 | | | | | | | | |
Goodwill | 143,000,000 | | | | | | | | |
Adjustment to other intangibles | | | | | (2,800,000) | | | | |
Adjustment to property, plant and equipment | | | | | 2,000,000 | | | | |
Adjustment to inventory | | | | | (700,000) | | | | |
Adjustment to trade receivables | | | | | (700,000) | | | | |
Increase in goodwill | | | | | 2,200,000 | | | | |
Proseal | January 1, 2020 Through December 31, 2020 | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Contingent earn-out payment | | | | | 17,700,000 | $ 17,700,000 | | 17,700,000 | |
Prime | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | 13,300,000 | | | | | | | | |
Inventories | 11,700,000 | | | | | | | | |
Property, plant and equipment | 1,500,000 | | | | | | | | |
Other intangible assets | 28,400,000 | | | | | | | | |
Deferred tax liabilities | 0 | | | | | | | | |
Financial liabilities | (22,300,000) | | | | | | | | |
Total identifiable net assets | 32,600,000 | | | | | | | | |
Cash consideration paid | | 62,600,000 | | | | | | | |
Contingent consideration | 1,300,000 | | | | | | | | |
Holdback payment due to seller | | 900,000 | | | | | | | |
Total consideration | 64,800,000 | | | | | | | | |
Cash acquired | 1,400,000 | | | | | | | | |
Net consideration | 63,400,000 | | | | | | | | |
Goodwill | $ 32,200,000 | | | | | | | | |
Adjustment to other intangibles | | | | | 1,900,000 | | | | |
Adjustment to property, plant and equipment | | | | | (1,200,000) | | | | |
Adjustment to inventory | | | | | 4,800,000 | | | | |
Increase in goodwill | | | | | 5,000,000 | | | | |
Adjustments to advance and progress payments | | | | | (9,400,000) | | | | |
Adjustment to accrued liabilities | | | | | (1,100,000) | | | | |
Prime | January 1, 2020 Through December 31, 2020 | Minimum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Contingent earn-out payment | | | | | 0 | 0 | | 0 | |
Prime | January 1, 2020 Through December 31, 2020 | Maximum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Contingent earn-out payment | | | | | 500,000 | 500,000 | | 500,000 | |
Prime | June 1, 2019 Through December 31, 2019 | Minimum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Contingent earn-out payment | | | | | 0 | 0 | | 0 | |
Prime | June 1, 2019 Through December 31, 2019 | Maximum | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Contingent earn-out payment | | | | | $ 1,000,000 | $ 1,000,000 | | $ 1,000,000 | |
LEKTRO | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | | 4,200,000 | | | | | | | |
Inventories | | 7,400,000 | | | | | | | |
Property, plant and equipment | | 300,000 | | | | | | | |
Other intangible assets | | 19,400,000 | | | | | | | |
Deferred tax liabilities | | (5,000,000) | | | | | | | |
Financial liabilities | | (4,600,000) | | | | | | | |
Total identifiable net assets | | 21,700,000 | | | | | | | |
Cash consideration paid | | 48,300,000 | | | | | | | |
Contingent consideration | | 0 | | | | | | | |
Holdback payment due to seller | | 0 | | | | | | | |
Total consideration | | 48,300,000 | | | | | | | |
Cash acquired | | 1,700,000 | | | | | | | |
Net consideration | | 46,600,000 | | | | | | | |
Goodwill | | $ 26,600,000 | | | | | | | |
FTNON | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | | | $ 17,200,000 | | | | | | |
Inventories | | | 4,500,000 | | | | | | |
Property, plant and equipment | | | 3,900,000 | | | | | | |
Other intangible assets | | | 19,000,000 | | | | | | |
Deferred tax liabilities | | | (3,400,000) | | | | | | |
Financial liabilities | | | (20,600,000) | | | | | | |
Total identifiable net assets | | | 20,600,000 | | | | | | |
Cash consideration paid | | | 43,600,000 | | | | | | |
Contingent consideration | | | 0 | | | | | | |
Holdback payment due to seller | | | 0 | | | | | | |
Total consideration | | | 43,600,000 | | | | | | |
Cash acquired | | | 4,900,000 | | | | | | |
Net consideration | | | 38,700,000 | | | | | | |
Goodwill | | | $ 23,000,000 | | | | | | |
Schroder | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] | | | | | | | | | |
Financial assets | | | | $ 4,300,000 | | | | | |
Inventories | | | | 6,600,000 | | | | | |
Property, plant and equipment | | | | 7,400,000 | | | | | |
Other intangible assets | | | | 4,200,000 | | | | | |
Deferred tax assets | | | | 400,000 | | | | | |
Financial liabilities | | | | (4,500,000) | | | | | |
Total identifiable net assets | | | | 18,400,000 | | | | | |
Cash consideration paid | | | | 20,300,000 | | | | | |
Contingent consideration | | | | 0 | | | | | |
Holdback payment due to seller | | | | 0 | | | | | |
Total consideration | | | | 20,300,000 | | | | | |
Cash acquired | | | | 1,500,000 | | | | | |
Net consideration | | | | 18,800,000 | | | | | |
Goodwill | | | | $ 1,900,000 | | | | | |