Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill, Beginning Balance		$ 11,248.0	$ 11,346.1
Accumulated impairment losses, Beginning Balance		(1,653.6)	(677.7)
Goodwill, net of accumulated impairment losses, Beginning Balance		9,594.4	10,668.4
Other acquisitions		25.0
Currency translation		(19.7)	(98.1)
Impairment	$ (975.9)		(975.9)
Goodwill, Ending Balance	11,248.0	11,253.3	11,248.0
Accumulated impairment losses, Ending Balance	(1,653.6)	(1,653.6)	(1,653.6)
Goodwill, net of accumulated impairment losses, Ending Balance	9,594.4	9,599.7	9,594.4
Americas [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		7,712.4	7,724.8
Goodwill, net of accumulated impairment losses, Beginning Balance		7,712.4	7,724.8
Currency translation		(12.6)	(12.4)
Goodwill, Ending Balance	7,712.4	7,699.8	7,712.4
Goodwill, net of accumulated impairment losses, Ending Balance	7,712.4	7,699.8	7,712.4
EMEA [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		1,322.2	1,379.8
Accumulated impairment losses, Beginning Balance		(567.0)
Goodwill, net of accumulated impairment losses, Beginning Balance		755.2	1,379.8
Currency translation		(5.4)	(57.6)
Impairment			(567.0)
Goodwill, Ending Balance	1,322.2	1,316.8	1,322.2
Accumulated impairment losses, Ending Balance	(567.0)	(567.0)	(567.0)
Goodwill, net of accumulated impairment losses, Ending Balance	755.2	749.8	755.2
Asia Pacific [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		507.2	500.5
Goodwill, net of accumulated impairment losses, Beginning Balance		507.2	500.5
Currency translation		0.2	6.7
Goodwill, Ending Balance	507.2	507.4	507.2
Goodwill, net of accumulated impairment losses, Ending Balance	507.2	507.4	507.2
Immaterial Product Category Operating Segments [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		1,706.2	1,741.0
Accumulated impairment losses, Beginning Balance		(1,086.6)	(677.7)
Goodwill, net of accumulated impairment losses, Beginning Balance		619.6	1,063.3
Other acquisitions		25.0
Currency translation		(1.9)	(34.8)
Impairment			(408.9)
Goodwill, Ending Balance	1,706.2	1,729.3	1,706.2
Accumulated impairment losses, Ending Balance	(1,086.6)	(1,086.6)	(1,086.6)
Goodwill, net of accumulated impairment losses, Ending Balance	$ 619.6	$ 642.7	$ 619.6