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(Income Taxes) (Details) $ in Millions | 8 Months Ended
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Aug. 31, 2017 USD ($)
Income Tax Information |
Tax benefit related to reduction in company's unrecognized tax benefits | $ 57
Pre-tax benefit on associated accrued interest reversals | 50
Continuing Operations [Member] |
Income Tax Information |
Tax benefit related to reduction in company's unrecognized tax benefits | 53
Pre-tax benefit on associated accrued interest reversals | 47
Discontinued Operations [Member] |
Income Tax Information |
Tax benefit related to reduction in company's unrecognized tax benefits | 4
Pre-tax benefit on associated accrued interest reversals | 3
2016 RTA [Member] |
Income Tax Information |
Other Tax Expense (Benefit) | $ 29

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