Goodwill and Identifiable Intangible Assets - Gross Carrying Value and Accumulated Amortization by Class of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Gross Carrying Amounts, Total identifiable intangibles	$ 1,358.8	$ 1,361.4
Accumulated Amortization, Total identifiable intangibles	(261.6)	(254.4)
Net Book Value, Total identifiable intangibles	1,097.2	1,107.0
Gross Carrying Amounts, Indefinite-lived tradenames	672.8	671.8
Accumulated Amortization, Indefinite-lived tradenames	0.0	0.0
Net Book Value, Indefinite-lived tradenames	672.8	671.8
Gross Carrying Amounts, Finite Lived	686.0	689.6
Accumulated Amortization, Finite Lived	(261.6)	(254.4)
Net Book Value, Finite Lived	424.4	435.2
Tradenames [Member]
Intangible Assets [Line Items]
Gross Carrying Amounts, Finite Lived	15.3	15.8
Accumulated Amortization, Finite Lived	(7.8)	(7.3)
Net Book Value, Finite Lived	7.5	8.5
Customer and contractual relationships [Member]
Intangible Assets [Line Items]
Gross Carrying Amounts, Finite Lived	610.5	611.9
Accumulated Amortization, Finite Lived	(209.9)	(203.1)
Net Book Value, Finite Lived	400.6	408.8
Patents/proprietary technology [Member]
Intangible Assets [Line Items]
Gross Carrying Amounts, Finite Lived	60.2	61.9
Accumulated Amortization, Finite Lived	(43.9)	(44.0)
Net Book Value, Finite Lived	$ 16.3	$ 17.9

Indefinite Lived Intangible Assets Accumulated Amortization

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Indefinite Lived Intangible Assets Gross

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Intangible Assets [Line Items]

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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.

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

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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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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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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