Acquisitions (Details) £ in Millions, SFr in Millions, $ in Millions								6 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 ($)	Feb. 19, 2016 CHF (SFr)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	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								$ 225.9		$ 103.1
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill								1,180.2	$ 1,180.2				$ 1,081.2
Arbo
Acquisitions
Percentage of ownership interest acquired	100.00%											100.00%
Aggregate cash purchase price, net of cash acquired	$ 10.3	£ 8.2
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	(1.4)
Deferred income tax liabilities	(1.4)
Goodwill	$ 4.7
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						217.2
Goodwill deductible for tax purposes								5.0	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					9.2	9.2
Inventories			13.1					13.4	13.4
Prepaid expenses and other current assets			2.3					2.7	2.7
Property, plant and equipment			4.2					4.2	4.2
Definite-lived intangible assets			135.1					135.1	135.1
Indefinite-lived intangible assets			23.6					23.6	23.6
Other long-term assets			3.2					2.9	2.9
Accounts payable			(7.0)					(7.0)	(7.0)
Income tax payable			(0.5)					(0.5)	(0.5)
Accrued expenses			(4.3)					(5.2)	(5.2)
Other long-term liabilities			(4.8)					(4.1)	(4.1)
Deferred income tax liabilities			(47.2)					(47.2)	(47.2)
Total identifiable net assets			130.3					130.6	130.6
Goodwill			$ 86.9					86.6	86.6
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	98.0
San Jamar | Acquired Technology
Recognized amounts of identifiable assets acquired and liabilities assumed:
Definite-lived intangible assets								36.4	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	0.7
San Jamar | Adjustment
Acquisitions
Total consideration transferred									0.0
Recognized amounts of identifiable assets acquired and liabilities assumed:
Receivables								0.1	0.1
Inventories								0.3	0.3
Prepaid expenses and other current assets								0.4	0.4
Other long-term assets								(0.3)	(0.3)
Accrued expenses								(0.9)	(0.9)
Other long-term liabilities								0.7	0.7
Total identifiable net assets								0.3	0.3
Goodwill								(0.3)	(0.3)
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								3.0	3.0
Definite-lived intangible assets								29.0	29.0
Accounts payable								(1.1)	(1.1)
Accrued expenses								(0.7)	(0.7)
Total identifiable net assets								39.3	39.3
Goodwill								43.4	43.4
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)
Property, plant and equipment								(0.3)	(0.3)
Accounts payable								0.2	0.2
Accrued expenses								0.1	0.1
Total identifiable net assets								(0.3)	(0.3)
Goodwill								0.3	0.3
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
Receivables											6.3
Inventories											8.6
Prepaid expenses and other current assets											0.3
Property, plant and equipment											16.0
Definite-lived intangible assets											26.5
Indefinite-lived intangible assets											0.0
Other long-term assets											1.0
Accounts payable											(1.7)
Accrued expenses											(2.5)
Total identifiable net assets											56.0
Goodwill											40.6
Micro-Coax | Trade names
Recognized amounts of identifiable assets acquired and liabilities assumed:
Indefinite-lived intangible assets											$ 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
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
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
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)
Property, plant and equipment											(14.0)
Definite-lived intangible assets											(5.0)
Indefinite-lived intangible assets											(2.0)
Accrued expenses											(0.1)
Total identifiable net assets											(21.2)
Goodwill											$ 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)