Discontinued Operations - Summary of Financial Information, Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ (6)	$ 164	$ (176)	$ 617
Net cash provided by (used in) discontinued operating activities	(18)	573	1,242	1,646
Net cash used in discontinued investing activities	(1,114)	(528)	(3,837)	(660)
Net cash provided by (used in) discontinued financing activities	(1,615)	(10)	(1,599)	19
Discontinued Operations, Disposed Of By Means Other Than Sale, Spinoff \| PayPal
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	29	216	503	744
Net cash provided by (used in) discontinued operating activities	32	547	1,287	1,680
Net cash used in discontinued investing activities	(1,091)	(490)	(3,744)	(564)
Net cash provided by (used in) discontinued financing activities	(1,615)	2	(1,599)	34
Discontinued Operations, Held-for-sale \| Enterprise
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	(35)	(52)	(679)	(127)
Net cash provided by (used in) discontinued operating activities	(50)	26	(45)	(34)
Net cash used in discontinued investing activities	(23)	(38)	(93)	(96)
Net cash provided by (used in) discontinued financing activities	$ 0	$ (12)	$ 0	$ (15)

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585

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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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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

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