Revenues - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Nov. 30, 2021 |
Nov. 30, 2020 |
Aug. 31, 2021 |
|
| Revenue from Contract with Customer [Abstract] | |||
| Revenue recognized | $ 107.2 | $ 60.7 | |
| Contract liabilities | 419.5 | $ 213.9 | |
| Commodity Contract Asset, Current | $ 40.1 | $ 29.0 | |