Income Taxes Other Income Tax Details (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Sep. 30, 2012	Jun. 29, 2011
Other Tax Carryforward [Line Items]
Equity Issuance, Amount		$ 55
Operating Loss Carryforwards, Limitations on Use	.9
Deferred Tax Assets, Net	27.9
Valuation Allowance, Deferred Tax Asset, Change in Amount	4.7
Deferred Tax Assets, Net, Current	23.2
Deferred Tax Assets, Operating Loss Carryforwards, Federal	18.0
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	31.4
Deferred Tax Assets, Operating Loss Carryforwards, City	$ 26.3

The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. An unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward is presented as a reduction of the related deferred tax asset.

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The tax effect as of the balance sheet date of the amount of excess of tax deductions over gross income in a year which cannot be used on the tax return of a state or local jurisdiction in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.

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