Employee Stock Benefit Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock plan acquired	1
Percentage of lower fair market value to be purchased of common stock through payroll deductions	85.00%
Shares issued	351,311	397,126	450,774
Options to purchase, number of shares outstanding	8,483,000	9,901,000
Number of restricted stock units unvested	772,000	1,124,000
Shares available for future grant	10,444,000
Weighted average grant-date fair value, granted	$ 48.32
Exercise prices for options outstanding, lower limit	$ 7.27
Exercise prices for options outstanding, upper limit	$ 53.95
Closing stock price	$ 58.60
Total intrinsic value of options exercised	$ 89.3	$ 64.7	$ 47.5
Total unamortized compensation expense	57.8
Total unamortized compensation expense weighted-average recognition period, in years	3 years 6 months
Maximum [Member] | Employee Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	120 months
Stock Plan Assumed Through Acquisition [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Options to purchase, number of shares outstanding	142,459
1990 Stock Option Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Options to purchase, number of shares outstanding	30,000
Employee Stock Purchase Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock-based compensation expense	3.9	3.3	2.9
Maximum number of shares authorized for grant	19,550,000
Shares available for future grant	6,609,375
Weighted average grant-date fair value, granted	$ 12.53	$ 10.81	$ 6.94
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	31,285,124
Percentage of fair market value of Common Stock	100.00%
Share units granted vesting percentage	100.00%
Options to purchase, number of shares outstanding	8,310,605
Number of restricted stock units unvested	771,735
Shares available for future grant	10,441,368
Share units granted vesting period, in years	3 years
2002 Stock Plan [Member] | Employee Stock Options [Member] | First Anniversary [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	20.00%
2002 Stock Plan [Member] | Employee Stock Options [Member] | Second Anniversary [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	40.00%
2002 Stock Plan [Member] | Employee Stock Options [Member] | After Second Anniversary [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	20.00%
2002 Stock Plan [Member] | Employee Stock Options [Member] | Fifth Anniversary [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share units granted vesting percentage	20.00%
2002 Stock Plan [Member] | Minimum [Member] | Employee Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	84 months
2002 Stock Plan [Member] | Minimum [Member] | Non-Employee Director Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	84 months
2002 Stock Plan [Member] | Maximum [Member] | Non-Employee Director Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	120 months
1992 Employee Stock Bonus Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares available for future grant	2,727
Stock Options [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Weighted average grant-date fair value of stock options granted	$ 15.02	$ 15.23	$ 11.85
Stock-based compensation expense	20.3	15.8	13.3
Restricted Stock Units (RSUs) [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Stock-based compensation expense	8.6	9.4	6.9
Share units granted vesting period, in years	3 years
Total unamortized compensation expense	$ 22.1
Total unamortized compensation expense weighted-average recognition period, in years	1 year 3 months 18 days