Supplemental Guarantor Condensed Consolidating Financial Statements - Cash Flows (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 31, 2014	May 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	$ 128.8	$ 67.8
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	(24.8)	(31.4)
Proceeds from sale of property, plant, and equipment	0.9	7.4
Investments in subsidiaries	0	0
Acquisitions of business and intangible assets, net of cash acquired	0	(25.5)
Net Cash Used for Investing Activities	(23.9)	(49.5)
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	8.3	10.0
Excess tax benefits from share-based payments	10.5	6.6
Intercompany capital		0
Dividends paid	(16.9)	(16.8)
Net Cash Provided by/(Used for) Financing Activities	1.9	(0.2)
Effect of Exchange Rate Changes on Cash	1.4	(0.7)
Net Change in Cash and Cash Equivalents	108.2	17.4
Cash and Cash Equivalents at Beginning of Period	359.1	284.5
Cash and Cash Equivalents at End of Period	467.3	301.9
Parent
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	102.3	29.0
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	0	(0.4)
Proceeds from sale of property, plant, and equipment	0	0
Investments in subsidiaries	0	0
Acquisitions of business and intangible assets, net of cash acquired		0
Net Cash Used for Investing Activities	0	(0.4)
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	8.3	10.0
Excess tax benefits from share-based payments	10.5	6.6
Intercompany capital		0
Dividends paid	(16.9)	(16.8)
Net Cash Provided by/(Used for) Financing Activities	1.9	(0.2)
Effect of Exchange Rate Changes on Cash	0	0
Net Change in Cash and Cash Equivalents	104.2	28.4
Cash and Cash Equivalents at Beginning of Period	331.0	246.6
Cash and Cash Equivalents at End of Period	435.2	275.0
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	25.3	38.3
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	(20.2)	(28.7)
Proceeds from sale of property, plant, and equipment	0.9	7.4
Investments in subsidiaries	(4.5)	(13.1)
Acquisitions of business and intangible assets, net of cash acquired		(3.8)
Net Cash Used for Investing Activities	(23.8)	(38.2)
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	0	0
Excess tax benefits from share-based payments	0	0
Intercompany capital		0
Dividends paid	0	0
Net Cash Provided by/(Used for) Financing Activities	0	0
Effect of Exchange Rate Changes on Cash	0	(0.1)
Net Change in Cash and Cash Equivalents	1.5	0
Cash and Cash Equivalents at Beginning of Period	0.8	0
Cash and Cash Equivalents at End of Period	2.3	0
Subsidiary Guarantor
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	0	0
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	0	0
Proceeds from sale of property, plant, and equipment	0	0
Investments in subsidiaries	0	0
Acquisitions of business and intangible assets, net of cash acquired		0
Net Cash Used for Investing Activities	0	0
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	0	0
Excess tax benefits from share-based payments	0	0
Intercompany capital		0
Dividends paid	0	0
Net Cash Provided by/(Used for) Financing Activities	0	0
Effect of Exchange Rate Changes on Cash	0	0
Net Change in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	0	0
Cash and Cash Equivalents at End of Period	0	0
Non- Guarantors
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	1.2	0.5
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	(4.6)	(2.3)
Proceeds from sale of property, plant, and equipment	0	0
Investments in subsidiaries	4.5	0
Acquisitions of business and intangible assets, net of cash acquired		(21.7)
Net Cash Used for Investing Activities	(0.1)	(24.0)
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	0	0
Excess tax benefits from share-based payments	0	0
Intercompany capital		13.1
Dividends paid	0	0
Net Cash Provided by/(Used for) Financing Activities	0	13.1
Effect of Exchange Rate Changes on Cash	1.4	(0.6)
Net Change in Cash and Cash Equivalents	2.5	(11.0)
Cash and Cash Equivalents at Beginning of Period	27.3	37.9
Cash and Cash Equivalents at End of Period	29.8	26.9
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	0	0
Cash Provided by (Used for) Investing Activities:
Purchases of property, plant, and equipment	0	0
Proceeds from sale of property, plant, and equipment	0	0
Investments in subsidiaries	0	13.1
Acquisitions of business and intangible assets, net of cash acquired		0
Net Cash Used for Investing Activities	0	13.1
Cash Provided by (Used for) Financing Activities:
Proceeds from stock option exercises and other	0	0
Excess tax benefits from share-based payments	0	0
Intercompany capital		(13.1)
Dividends paid	0	0
Net Cash Provided by/(Used for) Financing Activities	0	(13.1)
Effect of Exchange Rate Changes on Cash	0	0
Net Change in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	0	0
Cash and Cash Equivalents at End of Period	$ 0	$ 0