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Benefit Plans - Schedule of Amortization From Other Accumulated Comprehensive Income into Net Period Benefit Costs (Details) $ in Thousands | Aug. 31, 2017 USD ($)
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Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, health care benefits annual rate of increase in the per capita cost | 7.90%
Defined benefit plan, health care benefits, decrease in the per capita cost trend rate | 4.50%
Qualified Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Fiscal 2018 Amortization of prior service cost (benefit) | $ 1,540
Fiscal 2018 Amortization of net actuarial (gain) loss | 18,073
Non-Qualified Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Fiscal 2018 Amortization of prior service cost (benefit) | 30
Fiscal 2018 Amortization of net actuarial (gain) loss | 61
Other Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Fiscal 2018 Amortization of prior service cost (benefit) | (565)
Fiscal 2018 Amortization of net actuarial (gain) loss | $ (1,224)

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual 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 (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual 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 (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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