Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Funded Status for Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in benefit obligations:
Benefit obligation at beginning of period	$ 978.9	$ 963.0
Service cost	7.0	10.6	$ 11.4
Interest cost	22.9	26.1	30.4
Actuarial loss (gain)	27.8	81.5
Settlement/curtailment	(35.0)	(12.0)
Benefits paid	(35.5)	(39.9)
Employee contributions	2.2	2.8
Business divestiture	(120.2)	0.0
Other	1.2	3.2
Foreign exchange impact	57.6	(56.4)
Benefit obligation at end of period	906.9	978.9	963.0
Change in plan assets:
Fair value of plan assets at beginning of period	771.8	760.3
Actual return on plan assets	70.1	89.6
Employer contributions	28.1	17.9
Employee contributions	2.2	2.8
Benefits paid	(35.5)	(39.9)
Settlement/curtailment	(30.4)	(5.6)
Business divestiture	(74.2)	0.0
Other	(0.5)	2.1
Foreign exchange impact	44.6	(55.4)
Fair value of plan assets at end of period	776.2	771.8	760.3
Underfunded status at end of year	(130.7)	(207.1)
Accumulated benefit obligation at end of year	893.7	933.7
U.S.
Change in benefit obligations:
Benefit obligation at beginning of period	213.1	215.0
Service cost	0.1	0.6	0.7
Interest cost	6.8	7.8	8.6
Actuarial loss (gain)	11.3	8.9
Settlement/curtailment	(13.8)	(11.4)
Benefits paid	(12.9)	(12.7)
Employee contributions	0.0	0.0
Business divestiture	0.0	0.0
Other	0.1	4.9
Foreign exchange impact	0.0	0.0
Benefit obligation at end of period	204.7	213.1	215.0
Change in plan assets:
Fair value of plan assets at beginning of period	150.3	156.7
Actual return on plan assets	19.3	9.1
Employer contributions	6.3	0.2
Employee contributions	0.0	0.0
Benefits paid	(12.9)	(12.7)
Settlement/curtailment	(14.3)	(5.1)
Business divestiture	0.0	0.0
Other	0.0	2.1
Foreign exchange impact	0.0	0.0
Fair value of plan assets at end of period	148.7	150.3	156.7
Underfunded status at end of year	(56.0)	(62.8)
Accumulated benefit obligation at end of year	204.8	213.1
International
Change in benefit obligations:
Benefit obligation at beginning of period	765.8	748.0
Service cost	6.9	10.0	10.7
Interest cost	16.1	18.3	21.8
Actuarial loss (gain)	16.5	72.6
Settlement/curtailment	(21.2)	(0.6)
Benefits paid	(22.6)	(27.2)
Employee contributions	2.2	2.8
Business divestiture	(120.2)	0.0
Other	1.1	(1.7)
Foreign exchange impact	57.6	(56.4)
Benefit obligation at end of period	702.2	765.8	748.0
Change in plan assets:
Fair value of plan assets at beginning of period	621.5	603.6
Actual return on plan assets	50.8	80.5
Employer contributions	21.8	17.7
Employee contributions	2.2	2.8
Benefits paid	(22.6)	(27.2)
Settlement/curtailment	(16.1)	(0.5)
Business divestiture	(74.2)	0.0
Other	(0.5)	0.0
Foreign exchange impact	44.6	(55.4)
Fair value of plan assets at end of period	627.5	621.5	$ 603.6
Underfunded status at end of year	(74.7)	(144.3)
Accumulated benefit obligation at end of year	$ 688.9	$ 720.6