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Summary of Significant Accounting Policies Warranty roll-forward (Details) - USD ($) $ in Millions | 12 Months Ended |
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Feb. 23, 2018 | Feb. 24, 2017 | Feb. 26, 2016 | Feb. 27, 2015
Accounting Policies [Abstract] |  |  |  |
Standard and Extended Product Warranty Accrual | $ 36.8 | $ 41.3 | $ 42.1 | $ 39.4
Standard and Extended Product Warranty Accrual, Period Increase (Decrease) | 10.6 | 19.5 | 18.1 |
Standard and Extended Product Warranty Accrual, Decrease for Payments | 15.8 | 20.1 | 16.0 |
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) | $ 0.7 | $ (0.2) | $ 0.6 |

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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 + Details
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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 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)(2)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of increase (decrease) in the standard and extended product warranty liability. + 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) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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