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Recently Issued Accounting Standards New Accounting Pronouncements or Change in Accounting Principle (Details) - USD ($) $ in Millions	Mar. 02, 2019	Sep. 03, 2018	Sep. 02, 2018	Jun. 03, 2018	Sep. 03, 2017	Jun. 04, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change				$ 1.9	$ (0.1)	$ (0.1)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change			$ (1.5)	2.0	$ (0.1)	$ 0.2
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change	$ 1.4		$ 1.5	(0.1)
Accounting Standard Update 2016-01 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change				0.1
Accounting Standard Update 2016-01 | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change				$ 0.1
Accounting Standard Update 2018-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change		$ 1.5
Accounting Standard Update 2018-02 | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change		$ 1.5

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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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- Definition

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