Share-Based Awards (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	6 Months Ended
	Jul. 01, 2011 Y	Jun. 25, 2010	Dec. 31, 2010
Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]
Outstanding, beginning	5,509
Granted	569
Exercised	(425)
Canceled	(33)
Outstanding, ending	5,620
Outstanding Weighted Average Exercise Price	$ 32.01		$ 30.42
Granted, Weighted Average Exercise Price	$ 43.15
Exercised, Weighted Average Exercise Price	$ 26.00
Canceled, Weighted Average Exercise Price	$ 35.18
Options Exercisable	3,304		2,980
Weighted Average Exercise Price of Exercisable Options	$ 32.01		$ 31.99
Share-based compensation expense	$ 6.3	$ 5.1
Unrecognized compensation cost	$ 11.3
Weighted average recognition period	2.2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan Shares Issued	313	436
Stock purchase plan discount from market value	15.00%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	6.5	6.0
Interest rate	2.80%	2.70%
Volatility	33.70%	34.00%
Dividend yield	2.00%	3.00%
Weighted average fair value per share	$ 13.35	$ 7.38
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	1.0	1.0
Interest rate	0.30%	0.30%
Volatility	27.80%	42.80%
Dividend yield	2.10%	2.90%
Weighted average fair value per share	$ 10.05	$ 8.48