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STOCK-BASED COMPENSATION PLANS (Narrative) (Details) $ in Millions	12 Months Ended
	Aug. 31, 2023 USD ($) Interval shares	Aug. 31, 2022 USD ($) shares	Aug. 31, 2021 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $	$ 60.5	$ 47.0	$ 43.7
Stock-based compensation expense, tax \| $	14.2	9.3	9.9
Total unrecognized compensation cost \| $	$ 22.6
Period of unrecognized compensation to be recognized	1 year 9 months 18 days
Shares available for future grants	3,704,585
Fair value of shares vested \| $	$ 41.0	$ 30.5	$ 25.6
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and performance stock units, granted, shares	633,898	652,951	847,872
Restricted stock units \| United States
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting frequency \| Interval	3
Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and performance stock units, granted, shares	335,746	328,734	406,098
Performance Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	50.00%
Performance Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	200.00%
Performance Awards \| EBITDA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage that performance targets are weighted	75.00%	75.00%	75.00%
Performance Awards \| Relative total stockholder return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage that performance targets are weighted	25.00%	25.00%	25.00%
Liability awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and performance stock units, granted, shares	269,052	261,275
Equivalent number of awards outstanding	541,202
Equivalent number of shares expected to vest	514,142
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants	745,754
Maximum number of shares per employee	500
Purchase discount from market price	15.00%	15.00%	15.00%