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Income Taxes - Tax Credit Carryforwards (Details 7) $ in Millions | Aug. 31, 2017 USD ($)
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Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | $ 649
2018 - 2022 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 110
2023 - 2027 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 136
2028 - 2032 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 140
2033 - 2037 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 206
Indefinite |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 57
U.S. Federal |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 416
U.S. Federal | 2018 - 2022 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 48
U.S. Federal | 2023 - 2027 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 99
U.S. Federal | 2028 - 2032 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 64
U.S. Federal | 2033 - 2037 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 205
U.S. Federal | Indefinite |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 0
State |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 233
State | 2018 - 2022 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 62
State | 2023 - 2027 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 37
State | 2028 - 2032 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 76
State | 2033 - 2037 |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | 1
State | Indefinite |
Tax Credit Carryforward [Line Items] |
Tax credit carryforwards | $ 57

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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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