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Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Additional Information (Detail) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Provisions charged from operations for the profit sharing plan and retirement savings plans	$ 55,000,000	$ 50,000,000	$ 51,000,000
Contribution of common stock to profit sharing plan	0.8	1.0	0.9
Defined benefit pension plan corridor rate	10.00%
Minimum benefit obligation to apply new computation method	$ 50,000,000
Estimated reduction in service cost and interest cost	$ 4,000,000
Percentage of equity allocation, maximum	70.00%
Percentage of fixed income allocation, minimum	30.00%
Equity Security [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities, minimum	40.00%
Equity securities, maximum	50.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities, minimum	50.00%
Equity securities, maximum	60.00%

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- Definition

Contribution toward common stock as part of contribution to the profit sharing plan.

+ References

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- Definition

Defined benefit plan corridor percentage.

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- Definition

Forecasted reduction in defined benefit plan service cost and interest cost.

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- Definition

Minimum threshold limit in defined benefit obligation for application of new service and interest component computation method.

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- Definition

Percentage of equity allocation maximum.

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- Definition

Percentage of fixed income allocation including cash minimum.

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Target allocation maximum 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
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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

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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
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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-Name Accounting Standards Codification
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-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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