STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 25, 2012	Feb. 26, 2011	Feb. 27, 2010
STOCK-BASED COMPENSATION
Common stock authorized for issuance (in shares)	83.4
Stock-based compensation expense (pre-tax)	$ 45.2	$ 44.3	$ 44.2
Stock-based compensation expense (after tax)	28.5	27.1	26.9
Stock-based compensation expense per diluted share (in dollars per share)	$ 0.12	$ 0.10	$ 0.10
Stock-based compensation cost capitalized	1.3	1.2
Share Based Compensation Arrangement by Share Based Payment Award
Vesting period for awards (in years)	5 years
Service period prior to vesting period, minimum	1 year
Service period prior to vesting period, maximum	3 years
Stock Options
Share Based Compensation Arrangement by Share Based Payment Award
Vesting period for awards, minimum (in years)	3
Vesting period for awards, maximum (in years)	5
Unrecognized compensation expense related to the unvested portion of the Company's stock options or restricted stock awards	21.7
Weighted average period for recognition of the unrecognized compensation expense related to the unvested portion of stock options or restricted stock awards (in years)	3.0
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology
Weighted Average Expected Life (in years)	6.2	6.1	6.3
Weighted Average Expected Volatility (as a percent)	30.59%	33.70%	40.39%
Weighted Average Risk Free Interest Rates (as a percent)	2.34%	2.56%	2.45%
Expected Dividend Yield (as a percent)	0.00%	0.00%	0.00%
Stock Options Issued Since May 10, 2010
Share Based Compensation Arrangement by Share Based Payment Award
Service period prior to vesting period	1 year
Stock Options Issued Prior to May 10, 2010
Share Based Compensation Arrangement by Share Based Payment Award
Service period prior to vesting period, minimum	1 year
Service period prior to vesting period, maximum	3 years
Stock Options Issued Since May 10, 2004
Share Based Compensation Arrangement by Share Based Payment Award
Expiration term of stock options (in years)	8 years
Stock Options Issued Prior to May 10, 2004
Share Based Compensation Arrangement by Share Based Payment Award
Expiration term of stock options (in years)	10 years
Restricted Stock
Share Based Compensation Arrangement by Share Based Payment Award
Vesting period for awards (in years)	5 years
Service period prior to vesting period, minimum	1 year
Service period prior to vesting period, maximum	3 years
Unrecognized compensation expense related to the unvested portion of the Company's stock options or restricted stock awards	$ 108.4
Weighted average period for recognition of the unrecognized compensation expense related to the unvested portion of stock options or restricted stock awards (in years)	3.8