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Goodwill and Other Intangible Assets - Other Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	$ 413.2	$ 367.9
Non-amortized trademarks	115.8	64.2
Total other intangible assets	529.0	432.1
Accumulated Amortization, Total	(270.7)	(247.5)
Total other intangible assets	(270.7)	(247.5)
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	175.5	142.6
Accumulated Amortization, Total	(95.6)	(86.0)
Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	18.9	17.7
Accumulated Amortization, Total	(18.4)	(17.7)
Internally developed software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	174.5	165.7
Accumulated Amortization, Total	(129.7)	(118.3)
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	33.7	31.9
Accumulated Amortization, Total	(22.5)	(21.5)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	2.9	2.8
Accumulated Amortization, Total	(1.9)	(1.8)
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, Total	7.7	7.2
Accumulated Amortization, Total	$ (2.6)	$ (2.2)

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- Definition

Intangible assets, accumulated amortization (excluding goodwill).

+ References

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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