Fair Value (Tables)

12 Months Ended

Feb. 24, 2017

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 24, 2017 and February 26, 2016 are summarized below:

Fair Value of Financial Instruments	February 24, 2017
	Level 1		Level 2			Level 3		Total
Assets:
Cash and cash equivalents	$	197.1	$	—		$	—	$	197.1
Restricted cash	2.5		—			—		2.5
Managed investment portfolio and other investments
Corporate debt securities	—		33.6			—		33.6
U.S. agency debt securities	—		18.6			—		18.6
Municipal debt securities	—		15.1			—		15.1
Asset-backed securities	—		3.7			—		3.7
U.S. government debt securities	2.4		—			—		2.4
Foreign exchange forward contracts	—		3.5			—		3.5
Auction rate securities	—		—			3.5		3.5
	$	202.0	$	74.5		$	3.5	$	280.0
Liabilities:
Foreign exchange forward contracts	$	—	$	(0.9	)	$	—	$	(0.9	)
	$	—	$	(0.9	)	$	—	$	(0.9	)
Fair Value of Financial Instruments	February 26, 2016
	Level 1		Level 2			Level 3		Total
Assets:
Cash and cash equivalents	$	181.9	$	—		$	—	$	181.9
Restricted cash	2.5		—			—		2.5
Managed investment portfolio and other investments
Corporate debt securities	—		31.7			—		31.7
U.S. agency debt securities	—		34.7			—		34.7
Municipal debt securities	—		0.3			—		0.3
Asset-backed securities	—		9.2			—		9.2
U.S. government debt securities	8.2		—			—		8.2
Foreign exchange forward contracts	—		1.8			—		1.8
Auction rate securities	—		—			4.4		4.4
Canadian asset-backed commercial paper restructuring notes	—		3.1			—		3.1
	$	192.6	$	80.8		$	4.4	$	277.8
Liabilities:
Foreign exchange forward contracts	$	—	$	(3.3	)	$	—	$	(3.3	)
	$	—	$	(3.3	)	$	—	$	(3.3	)

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 24, 2017 and February 26, 2016:

Roll-forward of Fair Value Using Level 3 Inputs	Auction Rate Securities
Balance as of February 27, 2015	$	9.7
Unrealized gain on investments	(0.1		)
Redemption of auction rate securities at par	(5.2		)
Balance as of February 26, 2016	$	4.4
Unrealized loss on investments	$	(0.9	)
Balance as of February 24, 2017	$	3.5