Pension And Other Postretirement Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 H		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Number of years balance is paid to participant after retirement	15 years
Accumulated pension plan benefit obligation	$ 487.7		$ 423.7
Pension plans with benefit obligations in excess of plan assets, fair value of assets	370.5		86.2
Aggregate benefit obligation	460.1		156.4
Pension plans with accumulated benefit obligations in excess of plan assets, fair value of assets	7.3		7.0
Pension plans with accumulated benefit obligations in excess of plan assets, accumulated benefit obligation	83.1		70.2
Net gain (loss)	39.6		57.4
Net gain (loss) after tax	14.5		21.3
Discretionary contribution pension plans	30
Hours of service eligible for defined contribution plan	1,000
Amounts charged to income for defined contribution retirement plan	14.1		12.8		9.8
Long-term deferred compensation arrangement, expense	6.9		4.9		2.4
Long-term deferred compensation arrangement, liability	29.6		22.4
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan assets fair value	92.5		86.2
Benefit obligation	97.3		89.6
Accumulated pension plan benefit obligation	82.9		73.7
Net periodic benefit cost	4.2		3.7		3.2
Non-Qualified Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	77.5		66.8
Accumulated pension plan benefit obligation	72.9		62.4
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan assets fair value	455.6	[1]	416.2	[1]	355.7
Benefit obligation	544.0		476.6		485.0
Estimated net actuarial loss for pension benefits	11.7
Net periodic benefit cost	30.2		35.8		33.8
Foreign Defined Contribution Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan and small pension arrangement	5.1		4.2		2.6
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	7.7		7.9
Net periodic benefit cost	0.5		0.5		0.6
Amounts recognized in accumulated other comprehensive loss	2.5		2.4
After tax amount	$ 1.6		$ 1.5

[1] There were no plan assets categorized as Level 3 at December 31, 2014 and 2013, respectively.