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Pension and Other Postretirement Benefit Plans - Pension Plan Assets by Asset Category (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 522.1	$ 519.2	$ 503.5
Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	368.2	415.1	$ 417.0
Equity securities | U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	302.2	317.7
Equity securities | Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	211.5	238.9
Debt securities | U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	130.8	137.9
Debt securities | Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	115.2	136.8
Alternative investments | U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	53.0	53.7
Alternative investments | Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	34.0	33.1
Cash and other | U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	36.1	9.9
Cash and other | Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 7.5	$ 6.3

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+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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