Summary of Change in Plan Assets (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
U.S. Benefit Plans
Change in Plan Assets
Fair value of plan assets, beginning of year	$ 129,400,000	$ 112,200,000
Actual return on plan assets	5,900,000	20,500,000
Company contribution	8,200,000	6,800,000
Benefits and expenses paid	(9,500,000)	(10,100,000)
Translation and other	0	0
Fair value of plan assets, end of year	134,000,000	129,400,000
Non-U.S. Benefit Plan
Change in Plan Assets
Fair value of plan assets, beginning of year	62,400,000	54,800,000
Actual return on plan assets	2,200,000	7,600,000
Company contribution	1,200,000	1,700,000
Benefits and expenses paid	(3,100,000)	(3,100,000)
Translation and other	(3,700,000)	1,400,000
Fair value of plan assets, end of year	$ 59,000,000	$ 62,400,000

Defined Benefit Plan Other Changes Plan Assets

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)

-URI http://asc.fasb.org/extlink&oid=6504192

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Postretirement Benefits

-URI http://asc.fasb.org/extlink&oid=6521376

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

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-Paragraph 4

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Benefits

-URI http://asc.fasb.org/extlink&oid=6506267

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-Topic 715

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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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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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-Paragraph 1

-Subparagraph (b)

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