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Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets and Related Amortization Periods (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Mar. 31, 2018
Intangible Assets [Line Items] |  |
Intangible assets, Gross Carrying Amount | $ 15,227.2 | $ 14,031.2
Accumulated Amortization | (991.2) | (888.3)
Intangible assets, Net Book value | 14,236.0 | 13,142.9
Trade Names [Member] |  |
Intangible Assets [Line Items] |  |
Indefinite life, Net Book Value | 10,210.8 | 9,951.1
Trade Names [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 366.9 | 240.6
Accumulated Amortization | (58.5) | (36.6)
Net Book Value | $ 308.4 | 204.0
Trade Names [Member] | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 3 years |
Trade Names [Member] | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 30 years |
Capitalized Software [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 558.6 | 568.8
Accumulated Amortization | (349.6) | (364.7)
Net Book Value | $ 209.0 | 204.1
Capitalized Software [Member] | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 3 years |
Capitalized Software [Member] | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 12 years |
Patents and Intellectual Property [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 252.1 | 189.4
Accumulated Amortization | (142.8) | (83.0)
Net Book Value | $ 109.3 | 106.4
Patents and Intellectual Property [Member] | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 3 years |
Patents and Intellectual Property [Member] | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 14 years |
Customer Relationships & Distributor Channels [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 3,703.2 | 2,950.0
Accumulated Amortization | (377.8) | (337.2)
Net Book Value | $ 3,325.4 | 2,612.8
Customer Relationships & Distributor Channels [Member] | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 3 years |
Customer Relationships & Distributor Channels [Member] | Maximum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 30 years |
Other [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 135.6 | 131.3
Accumulated Amortization | (62.5) | (66.8)
Net Book Value | $ 73.1 | $ 64.5
Other [Member] | Minimum [Member] |  |
Intangible Assets [Line Items] |  |
Amortization periods | 3 years |

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