Fair Value (Tables)

12 Months Ended

Feb. 28, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Assets and liabilities measured at fair value in our Consolidated Balance Sheets as of February 28, 2014 and February 22, 2013 are summarized below:

Fair Value of Financial Instruments	February 28, 2014
	Level 1		Level 2			Level 3		Total
Assets:
Cash and cash equivalents	$	201.8	$	—		$	—	$	201.8
Restricted cash	9.0		—			—		9.0
Managed investment portfolio and other investments
Corporate debt securities	—		48.0			—		48.0
U.S. agency debt securities	—		48.9			—		48.9
U.S. government debt securities	7.8		—			—		7.8
Asset backed securities	—		5.6			—		5.6
Municipal debt securities	—		3.4			—		3.4
Other investments	—		5.8			—		5.8
Foreign exchange forward contracts	—		0.3			—		0.3
Auction rate securities	—		—			9.6		9.6
Canadian asset-backed commercial paper restructuring notes	—		3.7			—		3.7
	$	218.6	$	115.7		$	9.6	$	343.9
Liabilities:
Foreign exchange forward contracts	$	—	$	(3.2	)	$	—	$	(3.2	)
	$	—	$	(3.2	)	$	—	$	(3.2	)
Fair Value of Financial Instruments	February 22, 2013
	Level 1		Level 2			Level 3		Total
Assets:
Cash and cash equivalents	$	150.4	$	—		$	—	$	150.4
Restricted cash	3.5		—			—		3.5
Managed investment portfolio and other investments
Corporate debt securities	—		30.3			—		30.3
U.S. agency debt securities	—		44.1			—		44.1
U.S. government debt securities	4.4		—			—		4.4
Asset backed securities	—		5.5			—		5.5
Municipal debt securities	—		14.1			—		14.1
Other investments	—		2.1			—		2.1
Foreign exchange forward contracts	—		1.3			—		1.3
Auction rate securities	—		—			9.8		9.8
Canadian asset-backed commercial paper restructuring notes	—		—			3.5		3.5
	$	158.3	$	97.4		$	13.3	$	269.0
Liabilities:
Foreign exchange forward contracts	$	—	$	(1.9	)	$	—	$	(1.9	)
	$	—	$	(1.9	)	$	—	$	(1.9	)

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Below is a roll-forward of assets and liabilities measured at estimated fair value using Level 3 inputs for the years ended February 28, 2014 and February 22, 2013:

Roll-forward of Fair Value Using Level 3 Inputs	Auction Rate Securities			Canadian Asset-Backed Commercial Paper
Balance as of February 24, 2012	$	12.9		$	4.1
Unrealized gain on investments	1.9			—
Sale of investments	(5.0		)	—
Maturities of investments	—			(0.5		)
Currency translation adjustment	—			(0.1		)
Balance as of February 22, 2013	$	9.8		$	3.5
Unrealized gain (loss) on investments	(0.2		)	0.5
Currency translation adjustment	—			(0.3		)
Transfers out of Level 3	—			(3.7		)
Balance as of February 28, 2014	$	9.6		$	—