Stock Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant under stock compensation plan	35,492,790
Share Based Compensation Arrangement by Share Based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Dating	10 years 1 month
Share Based Compensation Arrangement By Share Based Payment Award Terms Of Award	Stock and units settled in stock subject to a restricted period and a purchase price, if any (as determined by the Compensation Committee of the Board of Directors), may be granted to key employees under the 2011 Plan. Certain restricted stock and restricted stock unit awards require the employee to deposit personally owned shares (on a one-for-one basis) during the restricted period. Restricted stock and restricted stock units generally vest and become unrestricted four years after the date of grant. Participants are entitled to dividends on such awarded shares and units, but only receive those amounts if the shares or units vest. The sale or transfer of these shares and units is restricted during the vesting period. Participants holding restricted stock, but not restricted stock units, are entitled to vote on matters submitted to holders of common stock for a vote.
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used	We estimate the fair value of each option on the grant date using a Black-Scholes option-pricing model, which requires us to make predictive assumptions regarding future stock price volatility, employee exercise behavior, and dividend yield. We estimate our future stock price volatility using the historical volatility over the expected term of the option, excluding time periods of volatility we believe a marketplace participant would exclude in estimating our stock price volatility. We also have considered, but did not use, implied volatility in our estimate, because trading activity in options on our stock, especially those with tenors of greater than 6 months, is insufficient to provide a reliable measure of expected volatility. Our expected term represents the period of time that options granted are expected to be outstanding based on historical data to estimate option exercises and employee terminations within the valuation model. Separate groups of employees have similar historical exercise behavior and therefore were aggregated into a single pool for valuation purposes. The weighted-average expected term for all employee groups is presented in the table above. The risk-free interest rate for periods during the expected term of the options is based on the U.S. Treasury zero-coupon yield curve in effect at the time of grant.
Total grant-date fair value of restricted stock units that vested in period	$ 134.1	$ 106.0
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Unrecognized compensation expense related to non-vested stock options and restricted stock units	125.4
Unrecognized compensation expense on non-vested awards weighted average period of recognition	1 year 5 months
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to stock-based payments	17.5	23.9	26.8
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to stock-based payments	$ 128.9	$ 124.3	$ 141.2