Benefit Plans - Reconciliations of Benefit Obligations, Fair Value of Plan Assets and Funded Status of Pension Plans and Other Post-Retirement Plans (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets
Fair value of plan assets beginning of year	$ 653.6
Fair value of plan assets end of year	629.4	$ 653.6
U.S. Pension Plans
Change in benefit obligations
Benefit obligation beginning of year	416.2	346.9
Service cost	14.0	13.1	$ 15.6
Interest cost	14.9	15.4	14.3
Actuarial loss	(39.1)	50.1
Translation (gain) loss	0.0	0.0
Benefits paid	(9.1)	(9.3)
Benefit obligation end of year	396.9	416.2	346.9
Change in plan assets
Fair value of plan assets beginning of year	343.9	285.8
Actual return on plan assets	(11.1)	63.7
Company contributions	4.0	3.7
Translation gain (loss)	0.0	0.0
Benefits paid	(9.1)	(9.3)
Fair value of plan assets end of year	327.7	343.9	285.8
Funded status
Plan assets less than benefit obligation	(69.2)	(72.3)
Non-US Pension Plans
Change in benefit obligations
Benefit obligation beginning of year	505.2	462.0
Service cost	9.6	7.4	8.4
Interest cost	14.2	17.3	17.9
Actuarial loss	(9.5)	73.0
Translation (gain) loss	(31.6)	(36.6)
Benefits paid	(17.9)	(17.9)
Benefit obligation end of year	470.0	505.2	462.0
Change in plan assets
Fair value of plan assets beginning of year	309.7	286.5
Actual return on plan assets	4.2	35.2
Company contributions	17.2	20.9
Translation gain (loss)	(11.5)	(15.0)
Benefits paid	(17.9)	(17.9)
Fair value of plan assets end of year	301.7	309.7	286.5
Funded status
Plan assets less than benefit obligation	(168.3)	(195.5)
Post-retirement
Change in benefit obligations
Benefit obligation beginning of year	41.5	42.4
Service cost	0.2	0.2	0.3
Interest cost	1.5	1.7	1.9
Actuarial loss	(0.9)	0.3
Translation (gain) loss	0.0	0.0
Benefits paid	(3.5)	(3.1)
Benefit obligation end of year	38.8	41.5	42.4
Change in plan assets
Fair value of plan assets beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Company contributions	3.5	3.1
Translation gain (loss)	0.0	0.0
Benefits paid	(3.5)	(3.1)
Fair value of plan assets end of year	0.0	0.0	$ 0.0
Funded status
Plan assets less than benefit obligation	$ (38.8)	$ (41.5)

Defined Benefit Plan, Fair Value of Plan Assets, Net

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- Definition

Defined Benefit Plan Recognized Actuarial Net Gains Losses

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No definition available.

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- Definition

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-Subparagraph (b)(1)
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-Publisher FASB
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-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)
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- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Postretirement Benefit Obligation
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- Definition

The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

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- Definition

Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

+ References

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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