Company's Investment Policy Targets and Ranges for Each Asset Category (Detail)	12 Months Ended
Dec. 31, 2015
U.S. Plans \| Equity Securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	58.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	52.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	64.00%
U.S. Plans \| Debt Securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	36.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	33.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	39.00%
U.S. Plans \| Real Estate
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	6.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	3.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	9.00%
U.S. Plans \| Cash
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	5.00%
U.S. Plans \| Other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	0.00%
International Plans \| Equity Securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	39.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	33.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	45.00%
International Plans \| Debt Securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	54.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	47.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	61.00%
International Plans \| Real Estate
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	1.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	3.00%
International Plans \| Cash
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	1.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	5.00%
International Plans \| Other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined benefit plan target allocation percentage of assets	5.00%
Defined Benefit Plan Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations Range Maximum	10.00%

Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
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