Changes in Benefit Obligations and Plan Assets Related to Continuing Operations (Detail) - Pension Plans, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year	$ 368.6	$ 361.2
Service cost	8.7	9.0	$ 8.3
Interest cost	12.8	14.8	14.6
Change in discount rate	(44.6)	53.4
Experience	0.8	(2.0)
Other assumption changes	3.5	4.2
Benefits paid	(17.7)	(9.8)
Curtailments		(62.2)
Benefit obligation at end of year	332.1	368.6	361.2
Fair value of plan assets at beginning of year	297.9	256.5
Actual return on plan assets	(13.9)	44.5
Company contributions	6.7	6.7
Fair value of plan assets at end of year	273.0	297.9	256.5
Funded status recognized in the balance sheet	(59.1)	(70.7)
Non-U.S. Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year	220.9	190.6
Service cost	10.8	10.4	10.8
Interest cost	5.7	5.5	5.8
Change in discount rate	(12.1)	5.9
Experience	4.7	(4.3)
Other assumption changes	4.8	1.4
Plan amendments	(0.1)	(0.5)
Benefits paid	(7.9)	(7.9)
Plan settlements	(0.8)	(0.1)
Special termination benefits	0.5	0.3	0.1
Translation difference	(9.6)	19.6
Benefit obligation at end of year	216.9	220.9	190.6
Fair value of plan assets at beginning of year	84.8	76.5
Actual return on plan assets	(1.9)	2.3
Company contributions	9.0	6.3
Translation difference	(5.4)	7.7
Fair value of plan assets at end of year	77.8	84.8	$ 76.5
Funded status recognized in the balance sheet	$ (139.1)	$ (136.1)