Acquisitions (Details) £ in Millions, SFr in Millions, $ in Millions								3 Months Ended		10 Months Ended
	Jan. 31, 2017 USD ($)	Jan. 31, 2017 GBP (£)	Jan. 09, 2017 USD ($)	Oct. 03, 2016 USD ($)	Jun. 10, 2016 USD ($)	Feb. 19, 2016 USD ($)	Feb. 19, 2016 CHF (SFr)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	Jan. 31, 2017 GBP (£)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Feb. 19, 2016 CHF (SFr)	Oct. 31, 2014 USD ($)
Acquisitions
Aggregate cash purchase price, net of cash acquired								$ 225.8	$ 8.1
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill								1,176.9		$ 1,176.9		$ 1,081.2
Arbo
Acquisitions
Percentage of ownership interest acquired	100.00%										100.00%
Aggregate cash purchase price, net of cash acquired	$ 10.2	£ 8.1
Contingent consideration	2.5										£ 2.0
Goodwill deductible for tax purposes	1.3
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents	1.2										£ 1.0
Receivables	1.5
Inventories	2.1
Definite-lived intangible assets	2.2
Indefinite-lived intangible assets	1.6
Accounts payable	(1.5)
Deferred income tax liabilities	(1.4)
Goodwill	$ 5.5
Arbo | Customer relationships
Acquisitions
Useful life of finite lived intangible assets	15 years	15 years
San Jamar
Acquisitions
Percentage of ownership interest acquired			100.00%
Aggregate cash purchase price, net of cash acquired			$ 213.7
Total consideration transferred			217.2
Goodwill deductible for tax purposes			5.0
Uncertain tax positions			4.1
Indemnification asset			3.2
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents			3.5					3.5		3.5
Receivables			9.1
Inventories			13.1
Prepaid expenses and other current assets			2.3
Property, plant and equipment			4.2
Definite-lived intangible assets			135.1
Indefinite-lived intangible assets			23.6
Other long-term assets			3.2
Accounts payable			(7.0)
Income tax payable			(0.5)
Accrued expenses			(4.3)
Other long-term liabilities			(4.8)
Deferred income tax liabilities			(47.2)
Total identifiable net assets			130.3
Goodwill			$ 86.9
San Jamar | Customer relationships
Acquisitions
Useful life of finite lived intangible assets			13 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 98.0
San Jamar | Acquired Technology
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 36.4
San Jamar | Acquired Technology | Minimum
Acquisitions
Useful life of finite lived intangible assets			7 years
San Jamar | Acquired Technology | Maximum
Acquisitions
Useful life of finite lived intangible assets			10 years
San Jamar | Non-compete agreement
Acquisitions
Useful life of finite lived intangible assets			2 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 0.7
Star Aviation
Acquisitions
Percentage of ownership interest acquired				100.00%
Aggregate cash purchase price, net of cash acquired				$ 82.4
Total consideration transferred								82.7
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents								0.3		0.3
Receivables								5.8		5.8
Inventories								2.9		2.9
Prepaid expenses and other current assets								0.1		0.1
Property, plant and equipment								3.3		3.3
Definite-lived intangible assets								29.0		29.0
Accounts payable								(1.1)		(1.1)
Accrued expenses								(0.7)		(0.7)
Total identifiable net assets								39.6		39.6
Goodwill								43.1		43.1
Star Aviation | Customer relationships
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								$ 23.9		23.9
Star Aviation | Customer relationships | Minimum
Acquisitions
Useful life of finite lived intangible assets								5 years
Star Aviation | Customer relationships | Maximum
Acquisitions
Useful life of finite lived intangible assets								10 years
Star Aviation | Acquired Technology
Acquisitions
Useful life of finite lived intangible assets								6 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								$ 4.7		4.7
Star Aviation | Non-compete agreement
Acquisitions
Useful life of finite lived intangible assets								5 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								$ 0.4		0.4
Star Aviation | Preliminary Allocation
Acquisitions
Total consideration transferred				82.7
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents				0.3
Receivables				5.9
Inventories				3.1
Prepaid expenses and other current assets				0.1
Property, plant and equipment				3.3
Definite-lived intangible assets				29.0
Accounts payable				(1.3)
Accrued expenses				(0.8)
Total identifiable net assets				39.6
Goodwill				$ 43.1
Star Aviation | Adjustment
Recognized amounts of identifiable assets acquired and liabilities assumed:
Receivables								(0.1)		(0.1)
Inventories								(0.2)		(0.2)
Accounts payable								0.2		0.2
Accrued expenses								0.1		0.1
Total identifiable net assets								0.0		0.0
Goodwill								0.0		0.0
Micro-Coax
Acquisitions
Percentage of ownership interest acquired					100.00%
Aggregate cash purchase price, net of cash acquired					$ 95.1
Total consideration transferred										96.6
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents								1.5		1.5
Receivables								6.3		6.3
Inventories								8.6		8.6
Prepaid expenses and other current assets								0.3		0.3
Property, plant and equipment								16.0		16.0
Definite-lived intangible assets								26.5		26.5
Indefinite-lived intangible assets								0.0		0.0
Other long-term assets								1.0		1.0
Accounts payable								(1.7)		(1.7)
Accrued expenses								(2.5)		(2.5)
Total identifiable net assets								56.0		56.0
Goodwill								40.6		40.6
Micro-Coax | Trade names
Recognized amounts of identifiable assets acquired and liabilities assumed:
Indefinite-lived intangible assets								0.9		$ 0.9
Micro-Coax | Customer relationships
Acquisitions
Useful life of finite lived intangible assets										12 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								14.5		$ 14.5
Micro-Coax | Acquired Technology
Acquisitions
Useful life of finite lived intangible assets										7 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								10.6		$ 10.6
Micro-Coax | Preliminary Allocation
Acquisitions
Total consideration transferred					97.3
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents					1.5
Receivables					6.3
Inventories					8.6
Prepaid expenses and other current assets					0.4
Property, plant and equipment					30.0
Definite-lived intangible assets					31.5
Indefinite-lived intangible assets					2.0
Other long-term assets					1.0
Accounts payable					(1.7)
Accrued expenses					(2.4)
Total identifiable net assets					77.2
Goodwill					$ 20.1
Micro-Coax | Preliminary Allocation | Trade names
Acquisitions
Useful life of finite lived intangible assets										10 years
Micro-Coax | Preliminary Allocation | Non-compete agreement
Acquisitions
Useful life of finite lived intangible assets										3 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								0.5		$ 0.5
Micro-Coax | Adjustment
Acquisitions
Total consideration transferred										(0.7)
Recognized amounts of identifiable assets acquired and liabilities assumed:
Prepaid expenses and other current assets								(0.1)		(0.1)
Property, plant and equipment								(14.0)		(14.0)
Definite-lived intangible assets								(5.0)		(5.0)
Indefinite-lived intangible assets								(2.0)		(2.0)
Accrued expenses								(0.1)		(0.1)
Total identifiable net assets								(21.2)		(21.2)
Goodwill								20.5		20.5
MS
Acquisitions
Percentage of ownership interest acquired						100.00%								100.00%
Total consideration transferred						$ 12.4	SFr 12.3
Contingent consideration						4.3								SFr 4.3
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets						9.7
Indefinite-lived intangible assets						4.1
Deferred income tax liabilities						(2.2)
Goodwill						$ 2.9
MS | Customer relationships
Acquisitions
Useful life of finite lived intangible assets						10 years	10 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets						$ 1.4
MS | Acquired Technology
Acquisitions
Useful life of finite lived intangible assets						7 years	7 years
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets						$ 8.3
LHi Technology
Acquisitions
Indemnification asset								$ 6.1		$ 6.1					$ 8.7
LHi Technology | Adjustment
Acquisitions
Contingent consideration													$ 2.6
Indemnification asset													$ (2.6)