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New Accounting Pronouncements (Details) - USD ($) $ in Millions	Aug. 31, 2021	Sep. 01, 2020	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings	$ 2,044.5		$ 2,127.5	$ 1,918.9	$ 1,716.8
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings	$ 2,810.3		2,523.3	$ 2,295.8	1,999.2
Cumulative-effect adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			(0.2)		(13.0)
Cumulative-effect adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings			$ (0.2)		$ (13.0)
Cumulative-effect adjustment | ASU 2016-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to retained earnings		$ 0.2

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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