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Employee Stock And Savings (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Contribution	$ 27.6	$ 26.6	$ 29.5
Deferred compensation plan assets	11.6	11.8
Deferred compensation plan liabilities	$ 11.6	$ 11.8
Maximum percentage of salary deferral	50.00%
Maximum deferral bonus afftert Tax	80.00%

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Maximum Deferral Bonus After Tax

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Maximum Percentage Of Salary Deferral

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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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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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- Definition

The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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The amount of the cost recognized during the period for defined contribution plans.

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