Postretirement and Other Employee Benefits (Details 2) $ in Millions	6 Months Ended
Feb. 28, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans	$ 1.5
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected cash contributions to funded pension plans during the fiscal year ended August 31, 2017	2.6
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected cash contributions to funded pension plans during the fiscal year ended August 31, 2017	$ 3.4

The increase in the fair value of plan assets from contributions made by the employer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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+ References

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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