Description of the maximum estimated period of time over which an employee is required to provide service in exchange for the equity-based payment award before the vesting period commences. This period may be explicit or implicit based on the terms of the award, and may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

No definition available.

Note 8 - Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		6 Months Ended
	Aug. 29, 2015	Aug. 30, 2014	Aug. 29, 2015	Aug. 30, 2014
The 2012 Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum			1 year
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum			3 years
The 2012 Plan [Member] \| Employee Stock Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
The 2012 Plan [Member] \| Employee Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
The 2012 Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum			1 year
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum			3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 23.12	$ 20.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			4 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 42,600,000		$ 42,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term			2 years 328 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 40,600,000		$ 40,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			8,200,000	$ 6,400,000
Proceeds from Stock Options Exercised			7,900,000
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options			$ 10,200,000
The 2012 Plan [Member] \| Performance Share Units [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage	0.00%		0.00%
The 2012 Plan [Member] \| Performance Share Units [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage	150.00%		150.00%
The 2012 Plan [Member] \| Performance Share Units [Member] \| One-year Performance Period Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum			1 year
The 2012 Plan [Member] \| Performance Share Units [Member] \| Scenario Assumption [Member]
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage	100.00%		100.00%
The 2012 Plan [Member] \| Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
The 2012 Plan [Member] \| Employee Stock Option Issued Since May 10, 2010 [Member]
Share Based Compensation Arrangement By Share Based Payment Award Requisite Service Period			1 year
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			8 years
The 2012 Plan [Member] \| Employee Stock Option Issued Prior To May 10, 2010 [Member]
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum			1 year
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum			3 years
The 2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	43.2		43.2
Restricted Stock [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 148,900,000		$ 148,900,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			4 years 36 days
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	28,800,000		$ 28,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			3 years 73 days
Performance Share Units [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	30,100,000		$ 30,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 182 days
Allocated Share-based Compensation Expense	16,100,000	$ 15,600,000	$ 33,900,000	33,800,000
Allocated Share-based Compensation Expense, Net of Tax	$ 10,000,000	$ 9,700,000	$ 21,100,000	$ 21,100,000
Stock Based Compensation Expense Impact On Diluted Earnings Per Share	$ 0.06	$ 0.05	$ 0.12	$ 0.11
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount			$ 1,000,000	$ 900,000
Proceeds from Stock Options Exercised			$ 7,879,000	$ 9,704,000