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Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Sep. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Asset impairment charges | $ 241 |  |  |
Asset impairment charges after tax | 235 |  |  |
Assets, fair value adjustment |  |  | $ 34 |
Assets fair value adjustment, net of tax |  |  | $ 27 |
Discontinued operation, loss from disposal of discontinued operation, before income tax |  | $ 6 |  |
Disposal group, held for sale or disposed of by sale, discontinued operation and not discontinued operation |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Disposal group, including discontinued operation, assets | 660 |  |  | $ 817
Disposal group, including discontinued operation, liabilities | $ 663 |  |  | $ 750

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