Fair Value Measurements (Fair Values Of Non-Financial Assets Measured At Fair Value On Non-Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified		9 Months Ended		12 Months Ended																12 Months Ended
	Feb. 26, 2012	Feb. 26, 2012 Segment, Continuing Operations [Member]	Feb. 26, 2012 Segment, Discontinued Operations [Member]	May 29, 2011 Fair Value, Measurements, Nonrecurring [Member]		Feb. 26, 2012 Fair Value, Measurements, Nonrecurring [Member]		Feb. 26, 2012 Fair Value, Measurements, Nonrecurring [Member] Quoted Prices In Active Market For Identical Assets (Liabilities) (Level 1) [Member]		May 29, 2011 Fair Value, Measurements, Nonrecurring [Member] Quoted Prices In Active Market For Identical Assets (Liabilities) (Level 1) [Member]		Feb. 26, 2012 Fair Value, Measurements, Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]		May 29, 2011 Fair Value, Measurements, Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]		Feb. 26, 2012 Fair Value, Measurements, Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]		May 29, 2011 Fair Value, Measurements, Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]		May 29, 2011 Fair Value, Measurements, Nonrecurring [Member] Segment, Continuing Operations [Member]	May 29, 2011 Fair Value, Measurements, Nonrecurring [Member] Segment, Discontinued Operations [Member]
Long-lived assets held for disposal				$ 4.4	[1]	$ 0.8	[2]	$ 0	[2]	$ 0	[1]	$ 0	[2]	$ 0	[1]	$ 0.8	[2]	$ 4.4	[1]
Long-lived assets held and used				0.7	[3]	0	[4]	0	[4]	0	[3]	0	[4]	0	[3]	0	[4]	0.7	[3]
Total				5.1		0.8		0		0		0		0		0.8		5.1
Carrying value of long-lived assets held for disposal				7.0		0.9
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0.8
Impairment of long-lived assets to be disposed of		0.3	0.1	2.6																1.9	0.7
Carrying value of long-lived assets held and used				2.8		0.3
Property, Plant, and Equipment, Fair Value Disclosure	0
Impairment of Long-Lived Assets Held-for-use																				$ 2.1

[1] In accordance with the provisions of ASC Topic 360, Property, Plant and Equipment, during fiscal 2011, long-lived assets held for disposal with a carrying amount of $7.0 million were written down to their fair value of $4.4 million, based on a review of comparable assets, resulting in an impairment charge of $2.6 million, of which $1.9 million was included in earnings from continuing operations and $0.7 million was included in losses from discontinued operation

[2] In accordance with the provisions of ASC Topic 360, Property, Plant and Equipment, during fiscal 2012, long-lived assets held for disposal with a carrying amount of $0.9 million were written down to their fair value of $0.8 million, based on a review of comparable assets, resulting in an impairment charge of $0.1 million, which was included in losses from discontinued operations.

[3] In accordance with the provisions of ASC Topic 360, Property, Plant and Equipment, during fiscal 2011, long-lived assets held and used with a carrying amount of $2.8 million were written down to their fair value of $0.7 million, based on a review of comparable assets, resulting in an impairment charge of $2.1 million, which was included in earnings from continuing operations.

[4] In accordance with the provisions of ASC Topic 360, Property, Plant and Equipment, during fiscal 2012, long-lived assets held and used with a carrying amount of $0.3 million were written down to their fair value of $0.0 million, due to fire loss, resulting in an impairment charge of $0.3 million, which was included in earnings from continuing operations.