Acquisitions, Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions |
9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Jan. 30, 2015 |
Dec. 31, 2014 |
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| Goodwill [Line Items] | |||||||
| Goodwill, Period Increase (Decrease) | $ 4 | ||||||
| Intangible assets subject to amortization | 1,177 | $ 875 | |||||
| Goodwill | [1] | 11,460 | 11,456 | ||||
| Payments to Acquire Businesses, Net of Cash Acquired | [1] | $ 1,677 | $ 0 | ||||
| Upper Limit | |||||||
| Goodwill [Line Items] | |||||||
| Discount Rate | 11.00% | ||||||
| Lower Limit | |||||||
| Goodwill [Line Items] | |||||||
| Discount Rate | 10.40% | ||||||
| Milestone | |||||||
| Goodwill [Line Items] | |||||||
| Estimated Purchase Price To Aquire Business Net Of Cash Acquired | $ 1,750 | ||||||
| Intangible assets subject to amortization | 345 | ||||||
| Goodwill | $ 730 | ||||||
| Discontinued operations | |||||||
| Goodwill [Line Items] | |||||||
| Goodwill | $ 9,867 | 13,569 | |||||
| CLL | |||||||
| Goodwill [Line Items] | |||||||
| Goodwill | 111 | 25 | |||||
| Consumer | |||||||
| Goodwill [Line Items] | |||||||
| Goodwill | 9,088 | 9,777 | |||||
| Energy Financial Services | |||||||
| Goodwill [Line Items] | |||||||
| Goodwill | 1,386 | 1,507 | |||||
| GECAS | |||||||
| Goodwill [Line Items] | |||||||
| Goodwill | $ 876 | $ 147 | |||||
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