Employee Stock Benefit Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock plan acquired	1
Aggregate Common Stock reserved for sale	15,550,000
Percentage of lower fair market value to be purchased of common stock through payroll deductions	85.00%
Shares issued	397,126	450,774	763,597
Options to purchase, number of shares outstanding	9,901,000	10,314,000
Number of restricted stock units unvested	1,124,000	1,202,000
Shares available for future grant	3,128,000
Weighted average grant-date fair value, granted	$ 41.32
Exercise prices for options outstanding, lower limit	$ 3.35
Exercise prices for options outstanding, upper limit	$ 48.18
Closing stock price	$ 43.40
Total intrinsic value of options exercised	$ 64.7	$ 47.5	$ 7.8
Total unamortized compensation expense	48.8
Total unamortized compensation expense weighted-average recognition period, in years	3.6
Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock-based compensation expense	15.8	13.3	11.7
Weighted average grant-date fair value, granted	$ 15.23	$ 11.85	$ 7.92
Restricted Stock Units [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock-based compensation expense	9.4	6.9	3.5
Share units granted vesting period, in years	three
Total unamortized compensation expense	12.6
Total unamortized compensation expense weighted-average recognition period, in years	1.08
Employee Stock Purchase Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock-based compensation expense	$ 3.3	$ 2.9	$ 3.4
Shares available for future grant	2,960,686
Weighted average grant-date fair value, granted	$ 10.81	$ 6.94	$ 5.28
2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock options granted vesting rate	1/12th per month
Maximum number of shares authorized for grant	20,000,000
Percentage of fair market value of Common Stock	100.00%
Share units granted vesting percentage	100.00%
Options to purchase, number of shares outstanding	9,673,018
Number of restricted stock units unvested	1,123,730
Shares available for future grant	3,124,101
Share units granted vesting period, in years	three years
Stock Plan Assumed Through An Acquisition [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Options to purchase, number of shares outstanding	178,451
1993 Stock Option Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Options to purchase, number of shares outstanding	5,000
1990 Stock Option Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Options to purchase, number of shares outstanding	45,000
1992 Employee Stock Bonus Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares available for future grant	3,643
Employee Stock Options [Member] | First Anniversary [Member] | 2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	20.00%
Employee Stock Options [Member] | Second Anniversary [Member] | 2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	40.00%
Employee Stock Options [Member] | After Second Anniversary [Member] | 2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	20.00%
Minimum [Member] | Employee Stock Options [Member] | 2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock options granted term, in months	84
Minimum [Member] | Non-Employee Director Stock Options [Member] | 2002 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock options granted term, in months	84
Maximum [Member] | Employee Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock options granted term, in months	120
Maximum [Member] | Non-Employee Director Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employee stock options granted term, in months	120