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Share-Based Payments Compensation Expense (Details) (Options and SOSARs, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Options and SOSARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense (in dollars)	$ 5.2	$ 5.0	$ 15.1	$ 19.3
Tax benefit (in dollars)	(1.4)	(1.4)	(4.3)	(5.3)
After-tax compensation expense (in dollars)	$ 3.8	$ 3.6	$ 10.8	$ 14.0

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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