Summary of Significant Accounting Policies Warranty roll-forward (Details) - USD ($) $ in Millions	12 Months Ended
Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017	Feb. 26, 2016
Accounting Policies [Abstract]
Standard and Extended Product Warranty Accrual	$ 31.0	$ 36.8	$ 41.3	$ 42.1
Standard and Extended Product Warranty Accrual, Period Increase (Decrease)	6.1	10.6	19.5
Standard and Extended Product Warranty Accrual, Decrease for Payments	11.6	15.8	20.1
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss)	$ (0.3)	$ 0.7	$ (0.2)

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(5)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

+ References

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Amount of increase (decrease) in the standard and extended product warranty liability.

+ References

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Amount of foreign currency translation gain (loss) which decreases (increases) the standard and extended product warranty accrual.

+ References

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