The aggregate amount of noncash, equity-based employee remuneration after taxes. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation.

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- Definition

This element represents the impact of stock-based compensation expense on diluted earnings per share.

+ Details

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Data Type:	us-types:perShareItemType
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- Definition

This element represents the expiration term of stock options from the date of grant.

+ Details

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- Definition

Represents the expense recognized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph g(1)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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- Definition

Represents the compensation cost capitalized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph g(1)

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- Definition

As of the latest balance-sheet date presented, the total compensation cost related to outstanding, nonvested share-based compensation awards not yet recognized (will be charged against earnings as services are performed or other vesting criteria are met).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h

+ Details

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- Definition

The weighted average period over which unrecognized share-based compensation costs are expected to be reported.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h

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- Definition

Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph a

+ Details

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(c)

+ Details

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Data Type:	us-types:percentItemType
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- Definition

The period of time a share-based award is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(d)

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- Definition

An entity using a valuation technique with different volatilities during the contractual term must disclose the range of expected volatilities used and the weighted-average expected volatility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(b)

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Data Type:	us-types:percentItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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The maximum number of shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the share-based compensation plan. As stock options and equity instruments other than options are awarded to participants, the shares remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph a

+ Details

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Stock-Based Compensation (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 27, 2011	Aug. 28, 2010	Aug. 27, 2011	Aug. 28, 2010
Stock-Based Compensation
Stock-based compensation expense (pre tax)	$ 10.6	$ 10.8	$ 24.3	$ 22.6
Stock-based compensation expense (after tax)	6.5	6.6	15.1	13.8
Stock-based compensation expense per diluted share (in dollars per share)	$ 0.03	$ 0.03	$ 0.06	$ 0.05
Stock-based compensation cost capitalized			0.7	0.6
Share Based Compensation Arrangement by Share Based Payment Award
Vesting terms for awards of stock options and restricted stock			generally vest in five equal annual installments beginning one to three years from the date of grant.
Common stock authorized for issuance (in shares)	83.4		83.4
Stock Options
Share Based Compensation Arrangement by Share Based Payment Award
Unrecognized compensation expense related to the unvested portion of the Company's stock options or restricted stock awards	26.2		26.2
Weighted average period for recognition of the unrecognized compensation expense related to the unvested portion of stock options or restricted stock awards (in years)			3.5
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology
Weighted Average Expected Life (in years)			6.2	6.1
Weighted Average Expected Volatility (as a percent)			30.59%	33.70%
Weighted Average Risk Free Interest Rates (as a percent)			2.34%	2.56%
Expected Dividend Yield (as a percent)			0.00%	0.00%
Stock Options Issued Since May 10, 2010
Share Based Compensation Arrangement by Share Based Payment Award
Vesting terms for awards of stock options and restricted stock			generally become exercisable in either three or five equal annual installments beginning one year from the date of grant
Stock Options Issued Prior to May 10, 2010
Share Based Compensation Arrangement by Share Based Payment Award
Vesting terms for awards of stock options and restricted stock			generally become exercisable in either three or five equal annual installments beginning one to three years from the date of grant
Stock Options Issued Since May 10, 2004
Share Based Compensation Arrangement by Share Based Payment Award
Expiration term of stock options (in years)			8
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
Restricted Stock
Share Based Compensation Arrangement by Share Based Payment Award
Vesting terms for awards of stock options and restricted stock			generally become exercisable in five equal annual installments beginning one to three years from the date of grant
Unrecognized compensation expense related to the unvested portion of the Company's stock options or restricted stock awards	$ 129.3		$ 129.3
Weighted average period for recognition of the unrecognized compensation expense related to the unvested portion of stock options or restricted stock awards (in years)			4.2