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New Accounting Pronouncements - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017 | Sep. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Decrease in cash flow from operating activities | $ (494,700,000) | $ (351,500,000) | $ (336,600,000) |
Increase in cash flow from investing activities | (53,000,000.0) | (204,000,000.0) | (48,800,000) |
Increase in operating profit | 462,900,000 | 460,800,000 | 527,500,000 |
Increase in miscellaneous expense | (4,700,000) | (1,400,000) | (2,400,000) |
Cumulative effect of applying ASC 606 in Retained Earnings |  |  |  | $ (13,000,000.0)
ASU 2016-15 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Proceeds from corporate-owned life insurance policies | 800,000 | 1,700,000 | 0 |
Decrease in cash flow from operating activities |  | 1,700,000 |  |
Increase in cash flow from investing activities |  | 1,700,000 |  |
ASU 2017-07 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Increase in miscellaneous expense |  | 1,400,000 | 2,400,000 |
ASU 2014-09 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect of applying ASC 606 in Retained Earnings |  |  |  | $ 13,000,000.0
Increase | ASU 2017-07 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Increase in operating profit |  | 6,200,000 | 8,700,000 |
Increase in miscellaneous expense |  | $ 6,200,000 | $ 8,700,000 |
Expect | Minimum | ASU 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease liability | 63,000,000 |  |  |
Expect | Maximum | ASU 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease liability | $ 68,000,000 |  |  |

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