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Discontinued Operations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash impairment charges, pre-tax	$ 241
Non-cash impairment charges after-tax	$ 235
Non-cash charge in cost of sales relating to depreciation and amortization expense, pre-tax			$ 34
Loss within the discontinued operations, pre-tax		$ 6
Loss within the discontinued operations of condensed consolidated statements of operations, after-tax		$ 6

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Asset Impairment Charges After Tax

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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