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New Accounting Standards Accounting Standards Update 2017-07 (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2020 | Nov. 22, 2019 | Aug. 23, 2019 | May 24, 2019 | Feb. 22, 2019 | Nov. 23, 2018 | Aug. 24, 2018 | May 25, 2018 | Feb. 28, 2020 | Feb. 22, 2019 | Feb. 23, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  |  |  |  |  |  |  | $ 2,508.5 | $ 2,355.3 | $ 2,050.3
Operating expenses |  |  |  |  |  |  |  |  | 958.2 | 904.3 | 850.0
Operating income (loss) | $ 69.0 | $ 75.1 | $ 85.3 | $ 27.6 | $ 47.0 | $ 45.4 | $ 67.9 | $ 23.3 | $ 257.0 | $ 183.6 | 155.2
Accounting Standards Update 2017-07 [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan, Accumulated Benefit Obligation |  |  |  |  |  |  |  |  |  |  | $ 7.1

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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