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Supplemental Guarantor Condensed Consolidating Financial Statements - Income Statement (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Net sales:
Total sales	$ 938.1	$ 947.6	$ 854.4	$ 932.6	$ 1,061.2	$ 944.0	$ 832.1	$ 842.8	$ 3,672.7	$ 3,680.1	$ 3,505.1
Cost of products sold									2,193.0	2,194.7	2,024.0
Gross profit	394.7	383.6	333.9	367.5	411.9	389.1	334.5	349.9	1,479.7	1,485.4	1,481.1
Selling, distribution, and administrative expenses									1,015.0	1,019.0	942.3
Intercompany charges									0.0	0.0	0.0
Special charges									1.8	5.6	11.3
Operating profit									462.9	460.8	527.5
Interest expense, net									33.3	33.5	32.5
Equity earnings in subsidiaries									0.0	0.0	0.0
Miscellaneous expense, net									4.7	1.4	2.4
Income before income taxes									424.9	425.9	492.6
Income tax (benefit) expense									94.5	76.3	170.9
Net income	$ 96.1	$ 88.4	$ 66.3	$ 79.6	$ 108.2	$ 73.0	$ 96.9	$ 71.5	330.4	349.6	321.7
Other comprehensive income (loss) items:
Foreign currency translation adjustments									(11.5)	(25.2)	19.0
Defined benefit plans, net of tax									(25.1)	21.2	20.7
Other comprehensive (loss) income items, net of tax									(36.6)	(4.0)	39.7
Comprehensive income									293.8	345.6	361.4
Consolidating Adjustments
Net sales:
Total sales									(257.4)	(264.8)	(228.6)
Cost of products sold									(201.2)	(198.6)	(173.4)
Gross profit									(56.2)	(66.2)	(55.2)
Selling, distribution, and administrative expenses									(56.3)	(66.1)	(55.1)
Intercompany charges									0.0	0.0	0.0
Special charges									0.0	0.0	0.0
Operating profit									0.1	(0.1)	(0.1)
Interest expense, net									0.0	0.0	0.0
Equity earnings in subsidiaries									353.0	362.6	328.4
Miscellaneous expense, net									0.0	0.0	0.0
Income before income taxes									(352.9)	(362.7)	(328.5)
Income tax (benefit) expense									0.0	0.0	0.0
Net income									(352.9)	(362.7)	(328.5)
Other comprehensive income (loss) items:
Foreign currency translation adjustments									11.5	25.2	(19.0)
Defined benefit plans, net of tax									17.3	(21.2)	(19.3)
Other comprehensive (loss) income items, net of tax									28.8	4.0	(38.3)
Comprehensive income									(324.1)	(358.7)	(366.8)
Parent
Net sales:
Total sales									0.0	0.0	0.0
Cost of products sold									0.0	0.0	0.0
Gross profit									0.0	0.0	0.0
Selling, distribution, and administrative expenses									15.6	41.0	39.2
Intercompany charges									(33.2)	(59.2)	(56.9)
Special charges									0.0	0.0	0.0
Operating profit									17.6	18.2	17.7
Interest expense, net									10.9	11.1	11.0
Equity earnings in subsidiaries									(330.0)	(344.3)	(320.9)
Miscellaneous expense, net									6.7	6.4	5.8
Income before income taxes									330.0	345.0	321.8
Income tax (benefit) expense									(0.4)	(4.6)	0.1
Net income									330.4	349.6	321.7
Other comprehensive income (loss) items:
Foreign currency translation adjustments									(11.5)	(25.2)	19.0
Defined benefit plans, net of tax									(25.1)	21.2	20.7
Other comprehensive (loss) income items, net of tax									(36.6)	(4.0)	39.7
Comprehensive income									293.8	345.6	361.4
Subsidiary Issuer
Net sales:
Total sales									3,253.6	3,275.7	3,105.2
Cost of products sold									1,940.1	1,951.2	1,764.6
Gross profit									1,313.5	1,324.5	1,340.6
Selling, distribution, and administrative expenses									897.6	884.6	824.6
Intercompany charges									25.6	49.5	47.7
Special charges									1.8	5.6	11.3
Operating profit									388.5	384.8	457.0
Interest expense, net									17.4	16.9	16.1
Equity earnings in subsidiaries									(23.2)	(18.5)	(7.7)
Miscellaneous expense, net									(2.1)	(1.8)	(7.9)
Income before income taxes									396.4	388.2	456.5
Income tax (benefit) expense									84.5	72.0	158.0
Net income									311.9	316.2	298.5
Other comprehensive income (loss) items:
Foreign currency translation adjustments									(11.5)	(25.2)	19.0
Defined benefit plans, net of tax									(17.1)	16.9	11.8
Other comprehensive (loss) income items, net of tax									(28.6)	(8.3)	30.8
Comprehensive income									283.3	307.9	329.3
Subsidiary Guarantor
Net sales:
Total sales									52.7	53.6	49.4
Cost of products sold									0.0	0.0	0.0
Gross profit									52.7	53.6	49.4
Selling, distribution, and administrative expenses									2.8	3.2	3.6
Intercompany charges									0.0	0.0	0.0
Special charges									0.0	0.0	0.0
Operating profit									49.9	50.4	45.8
Interest expense, net									0.0	0.0	0.0
Equity earnings in subsidiaries									0.0	0.0	0.0
Miscellaneous expense, net									0.0	0.0	0.0
Income before income taxes									49.9	50.4	45.8
Income tax (benefit) expense									10.5	8.5	15.7
Net income									39.4	41.9	30.1
Other comprehensive income (loss) items:
Foreign currency translation adjustments									0.0	0.0	0.0
Defined benefit plans, net of tax									0.0	0.0	0.0
Other comprehensive (loss) income items, net of tax									0.0	0.0	0.0
Comprehensive income									39.4	41.9	30.1
Non- Guarantors
Net sales:
Total sales									623.8	615.6	579.1
Cost of products sold									454.1	442.1	432.8
Gross profit									169.7	173.5	146.3
Selling, distribution, and administrative expenses									155.3	156.3	130.0
Intercompany charges									7.6	9.7	9.2
Special charges									0.0	0.0	0.0
Operating profit									6.8	7.5	7.1
Interest expense, net									5.0	5.5	5.4
Equity earnings in subsidiaries									0.2	0.2	0.2
Miscellaneous expense, net									0.1	(3.2)	4.5
Income before income taxes									1.5	5.0	(3.0)
Income tax (benefit) expense									(0.1)	0.4	(2.9)
Net income									1.6	4.6	(0.1)
Other comprehensive income (loss) items:
Foreign currency translation adjustments									0.0	0.0	0.0
Defined benefit plans, net of tax									(0.2)	4.3	7.5
Other comprehensive (loss) income items, net of tax									(0.2)	4.3	7.5
Comprehensive income									1.4	8.9	7.4
External sales
Net sales:
Total sales									3,672.7	3,680.1	3,505.1
External sales | Consolidating Adjustments
Net sales:
Total sales									0.0	0.0	0.0
External sales | Parent
Net sales:
Total sales									0.0	0.0	0.0
External sales | Subsidiary Issuer
Net sales:
Total sales									3,253.6	3,275.7	3,105.2
External sales | Subsidiary Guarantor
Net sales:
Total sales									0.0	0.0	0.0
External sales | Non- Guarantors
Net sales:
Total sales									419.1	404.4	399.9
Intercompany sales
Net sales:
Total sales									0.0	0.0	0.0
Intercompany sales | Consolidating Adjustments
Net sales:
Total sales									(257.4)	(264.8)	(228.6)
Intercompany sales | Parent
Net sales:
Total sales									0.0	0.0	0.0
Intercompany sales | Subsidiary Issuer
Net sales:
Total sales									0.0	0.0	0.0
Intercompany sales | Subsidiary Guarantor
Net sales:
Total sales									52.7	53.6	49.4
Intercompany sales | Non- Guarantors
Net sales:
Total sales									$ 204.7	$ 211.2	$ 179.2

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Subsidiary earnings portion attributable to temporary equity.

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