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Cost-Reduction Actions - Individual Components of Work Force Reduction and Idle Lease Cost (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2018
Total
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 117.8
Payments		(26.3)
Changes in estimates	$ 0.7	(2.2)
Translation adjustments		(2.1)
Balance at end of period	87.2	87.2
2018 remaining six months	53.4	53.4
Beyond 2018	53.4	53.4
Total | Forecast
Restructuring Reserve [Roll Forward]
2018 remaining six months			$ 33.8
Beyond 2018			33.8
Work-Force Reductions | U.S.
Restructuring Reserve [Roll Forward]
Balance at beginning of period		3.9
Payments		(2.2)
Changes in estimates		(1.2)
Translation adjustments		0.0
Balance at end of period	0.5	0.5
2018 remaining six months	0.5	0.5
Beyond 2018	0.5	0.5
Work-Force Reductions | U.S. | Forecast
Restructuring Reserve [Roll Forward]
2018 remaining six months			0.0
Beyond 2018			0.0
Work-Force Reductions | International
Restructuring Reserve [Roll Forward]
Balance at beginning of period		109.6
Payments		(22.9)
Changes in estimates		(2.4)
Translation adjustments		(2.1)
Balance at end of period	82.2	82.2
2018 remaining six months	51.8	51.8
Beyond 2018	51.8	51.8
Work-Force Reductions | International | Forecast
Restructuring Reserve [Roll Forward]
2018 remaining six months			30.4
Beyond 2018			30.4
Idle Leased Facilities Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period		4.3
Payments		(1.2)
Changes in estimates		1.4
Translation adjustments		0.0
Balance at end of period	4.5	4.5
2018 remaining six months	1.1	1.1
Beyond 2018	$ 1.1	$ 1.1
Idle Leased Facilities Costs | Forecast
Restructuring Reserve [Roll Forward]
2018 remaining six months			3.4
Beyond 2018			$ 3.4

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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