Number of Employee SARs and Director SARs Granted, Associated Weighted Average Base Values, And Weighted Average Grant-Date Fair Values (Detail) (Stock Appreciation Rights, USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	300,000
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	300,000	700,000	1,000,000
Weighted average exercise price (per unit)	$ 53	$ 39	$ 35
Weighted average grant-date fair value (per unit)	$ 17	$ 13	$ 12
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	3,277	5,903	5,915
Weighted average exercise price (per unit)	$ 59	$ 44	$ 39
Weighted average grant-date fair value (per unit)	$ 22	$ 15	$ 14

The weighted average exercise price at grant for share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

No definition available.

+ Details

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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