Fair Value Reconciliation of Changes in Level 3 Balances (Details) (Fair Value, Inputs, Level 3 [Member], Auction Rate Securities [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Aug. 29, 2014
Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at the beginning of the period	$ 9.6
Unrealized gain on investments	0.1
Other-than-temporary impairments	0
Currency translation adjustment	0
Balance at the end of period	$ 9.7