Schedule of Segment Reporting Information, by Segment [Table Text Block] |
Financial information for our reportable operating segments is summarized as follows. | | | | | | | | | | | | | | | | | | | | | | Year ended December 31, ($ in millions) | | Automotive Finance operations | | Insurance operations | | Mortgage operations (a) | | Corporate and Other (b) | | Consolidated (c) | 2012 | | | | | | | | | | | Net financing revenue (loss) | | $ | 2,827 |
| | $ | 64 |
| | $ | 149 |
| | $ | (1,149 | ) | | $ | 1,891 |
| Other revenue (loss) | | 322 |
| | 1,150 |
| | 1,159 |
| | (57 | ) | | 2,574 |
| Total net revenue (loss) | | 3,149 |
| | 1,214 |
| | 1,308 |
| | (1,206 | ) | | 4,465 |
| Provision for loan losses | | 253 |
| | — |
| | 86 |
| | (10 | ) | | 329 |
| Total noninterest expense | | 1,507 |
| | 1,054 |
| | 627 |
| | 434 |
| | 3,622 |
| Income (loss) from continuing operations before income tax expense | | $ | 1,389 |
| | $ | 160 |
| | $ | 595 |
| | $ | (1,630 | ) | | $ | 514 |
| Total assets | | $ | 128,411 |
| | $ | 8,439 |
| | $ | 14,744 |
| | $ | 30,753 |
| | $ | 182,347 |
| 2011 | | | | | | | | | | | Net financing revenue (loss) | | $ | 2,530 |
| | $ | 62 |
| | $ | 205 |
| | $ | (1,673 | ) | | $ | 1,124 |
| Other revenue | | 422 |
| | 1,336 |
| | 354 |
| | 176 |
| | 2,288 |
| Total net revenue (loss) | | 2,952 |
| | 1,398 |
| | 559 |
| | (1,497 | ) | | 3,412 |
| Provision for loan losses | | 89 |
| | — |
| | 123 |
| | (51 | ) | | 161 |
| Total noninterest expense | | 1,530 |
| | 1,082 |
| | 344 |
| | 472 |
| | 3,428 |
| Income (loss) from continuing operations before income tax expense | | $ | 1,333 |
| | $ | 316 |
| | $ | 92 |
| | $ | (1,918 | ) | | $ | (177 | ) | Total assets | | $ | 112,591 |
| | $ | 8,036 |
| | $ | 33,906 |
| | $ | 29,526 |
| | $ | 184,059 |
| 2010 | | | | | | | | | | | Net financing revenue (loss) | | $ | 2,697 |
| | $ | 73 |
| | $ | 308 |
| | $ | (2,005 | ) | | $ | 1,073 |
| Other revenue (loss) | | 724 |
| | 1,728 |
| | 257 |
| | (37 | ) | | 2,672 |
| Total net revenue (loss) | | 3,421 |
| | 1,801 |
| | 565 |
| | (2,042 | ) | | 3,745 |
| Provision for loan losses | | 260 |
| | — |
| | 148 |
| | (47 | ) | | 361 |
| Total noninterest expense | | 1,404 |
| | 1,244 |
| | 340 |
| | 633 |
| | 3,621 |
| Income (loss) from continuing operations before income tax expense | | $ | 1,757 |
| | $ | 557 |
| | $ | 77 |
| | $ | (2,628 | ) | | $ | (237 | ) | Total assets | | $ | 97,961 |
| | $ | 8,789 |
| | $ | 36,786 |
| | $ | 28,472 |
| | $ | 172,008 |
|
| | (a) | Represents the ResCap legal entity (prior to its deconsolidation from Ally as of May 14, 2012) and the mortgage activities of Ally Bank. |
| | (b) | Total assets for the Commercial Finance Group were $1.5 billion, $1.2 billion, and $1.6 billion at December 31, 2012, 2011 and 2010, respectively. |
| | (c) | Net financing revenue after the provision for loan losses totaled $1.6 billion, $1.0 billion, and $0.7 billion in 2012, 2011 and 2010, respectively. |
|
Information Concerning Principal Geographic Areas [Table Text Block] |
Information concerning principal geographic areas were as follows. | | | | | | | | | | | | | | | | | | | | | | Year ended December 31, ($ in millions) | | Revenue (a) | | Income (loss) from continuing operations before income tax expense (b) | | Net income (loss) (b) | | Identifiable assets (c) | | Long-lived assets (d) | 2012 | | | | | | | | | | | Canada | | $ | 233 |
| | $ | 48 |
| | $ | 295 |
| | $ | 13,362 |
| | $ | 1 |
| Europe (e) | | (28 | ) | | (14 | ) | | 183 |
| | 10,971 |
| | 16 |
| Latin America | | 2 |
| | (19 | ) | | 219 |
| | 8,050 |
| | 33 |
| Asia-Pacific | | 4 |
| | 3 |
| | 99 |
| | 395 |
| | — |
| Total foreign | | 211 |
| | 18 |
| | 796 |
| | 32,778 |
| | 50 |
| Total domestic (f) | | 4,254 |
| | 496 |
| | 400 |
| | 149,542 |
| | 13,831 |
| Total | | $ | 4,465 |
| | $ | 514 |
| | $ | 1,196 |
| | $ | 182,320 |
| | $ | 13,881 |
| 2011 | | | | | | | | | | | Canada | | $ | 174 |
| | $ | (13 | ) | | $ | 436 |
| | $ | 15,156 |
| | $ | 282 |
| Europe (e) | | (42 | ) | | (3 | ) | | 175 |
| | 9,976 |
| | 92 |
| Latin America | | 4 |
| | (18 | ) | | 104 |
| | 7,647 |
| | 30 |
| Asia-Pacific | | 2 |
| | — |
| | 69 |
| | 292 |
| | — |
| Total foreign | | 138 |
| | (34 | ) | | 784 |
| | 33,071 |
| | 404 |
| Total domestic (f) | | 3,274 |
| | (143 | ) | | (941 | ) | | 150,470 |
| | 9,236 |
| Total | | $ | 3,412 |
| | $ | (177 | ) | | $ | (157 | ) | | $ | 183,541 |
| | $ | 9,640 |
| 2010 | | | | | | | | | | | Canada | | $ | 157 |
| | $ | (40 | ) | | $ | 402 |
| | $ | 17,321 |
| | $ | 1,522 |
| Europe (e) | | (67 | ) | | (85 | ) | | 278 |
| | 11,321 |
| | 406 |
| Latin America | | 12 |
| | (7 | ) | | 164 |
| | 6,917 |
| | 35 |
| Asia-Pacific | | 4 |
| | 6 |
| | 7 |
| | 202 |
| | — |
| Total foreign | | 106 |
| | (126 | ) | | 851 |
| | 35,761 |
| | 1,963 |
| Total domestic (f) | | 3,639 |
| | (111 | ) | | 178 |
| | 135,722 |
| | 7,541 |
| Total | | $ | 3,745 |
| | $ | (237 | ) | | $ | 1,029 |
| | $ | 171,483 |
| | $ | 9,504 |
|
| | (a) | Revenue consists of net financing revenue and total other revenue as presented in our Consolidated Statement of Income. |
| | (b) | The domestic amounts include original discount amortization of $349 million, $925 million, and $1.2 billion for the year ended December 31, 2012, 2011, and 2010, respectively. |
| | (c) | Identifiable assets consist of total assets excluding goodwill. |
| | (d) | Long-lived assets consist of investment in operating leases, net, and net property and equipment. |
| | (e) | Amounts include eliminations between our foreign operations. |
| | (f) | Amounts include eliminations between our domestic and foreign operations. |
|