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Business Dispositions and Discontinued Operations - Cash Flows from Discontinued Operations (Details) - Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided by operating activities from discontinued operations	$ 603	$ 797	$ 784
Net cash provided by investing activities from discontinued operations	463	1,466	864
Net cash used in financing activities from discontinued operations	(737)	(884)	(647)
Cash paid for interest	0	11	11
Return to capital to parent	$ 619	$ 1,396	$ 752

X

- Definition

Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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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.

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The amount of cash paid during the current period for interest owed on debt associated with discontinued operations.

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Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends.

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