Ally Financial (ALLY) 10-Q 29 Oct 15 2015 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	9 Months Ended
	Sep. 30, 2015	Oct. 28, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	Ally Financial Inc.
Entity Central Index Key	40,729
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		481,752,179
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 10,478,726,281

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Revenue and Other Interest Income [Abstract]
Interest and fees on finance receivables and loans	$ 1,166	$ 1,114	$ 3,358	$ 3,345
Interest on loans held-for-sale	2	0	40	1
Interest and dividends on available-for-sale investment securities	102	94	283	282
Interest-bearing cash	2	2	6	6
Operating leases	830	899	2,586	2,653
Total financing revenue and other interest income	2,102	2,109	6,273	6,287
Interest Expense [Abstract]
Interest on deposits	181	166	530	495
Interest on short-term borrowings	13	12	36	40
Interest on long-term debt	410	493	1,258	1,576
Total interest expense	604	671	1,824	2,111
Depreciation expense on operating lease assets	528	549	1,713	1,600
Net financing revenue (loss)	970	889	2,736	2,576
Other revenue [Abstract]
Servicing fees	12	6	32	22
Insurance premiums and service revenue earned	236	246	706	736
Gain (loss) on mortgage and automotive loans, net	(2)	0	45	6
Gains (Losses) on Extinguishment of Debt	0	0	(354)	(46)
Other gain (loss) on investments, net	6	45	106	129
Other income, net of losses	80	78	251	214
Total other revenue	332	375	786	1,061
Total net revenue (loss)	1,302	1,264	3,522	3,637
Provision for loan losses	211	102	467	302
Noninterest Expense [Abstract]
Compensation and benefits expense	235	241	726	710
Insurance losses and loss adjustment expenses	61	97	239	353
Other operating expenses	378	404	1,128	1,213
Total noninterest expense	674	742	2,093	2,276
Income (loss) from continuing operations before income tax expense	417	420	962	1,059
Income tax expense (benefit) from continuing operations	144	127	341	285
Net income (loss) from continuing operations	273	293	621	774
Income (loss) from discontinued operations, net of tax	(5)	130	405	199
Net income (loss)	268	423	1,026	973
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	61	(55)	(56)	126
Comprehensive income (loss)	$ 329	$ 368	$ 970	$ 1,099
Earnings Per Share, Basic [Abstract]
Net income (loss) from continuing operations, Per Basic Share	$ 0.49	$ 0.47	$ (1.52)	$ 1.19
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	(0.01)	0.27	0.84	0.41
Net (loss) income, Basic	0.48	0.74	(0.68)	1.60
Earnings Per Share, Diluted [Abstract]
Net income (loss) from continuing operations, Per Diluted Share	0.49	0.47	(1.52)	1.19
Income (loss) from discontinued operations, net of tax	(0.01)	0.27	0.84	0.41
Net (loss) income, Diluted	$ 0.47	$ 0.74	$ (0.68)	$ 1.60

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Assets [Abstract]
Cash and Due from Banks	$ 1,666	$ 1,348
Interest-bearing Deposits in Banks and Other Financial Institutions	3,561	4,228
Total cash and cash equivalents	5,227	5,576
Investment securities	18,758	16,137
Loans held-for-sale, net	37	2,003
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	107,991	99,948
Allowance for loan losses	(1,018)	(977)
Total finance receivables and loans, net	106,973	98,971
Investment in operating leases, net	17,292	19,510
Premiums receivable and other insurance assets	1,794	1,695
Other Assets	6,024	7,302
Assets of operations held-for-sale	0	634
Total assets	156,105	151,828
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	91	64
Interest-bearing deposit liabilities	63,950	58,158
Total deposit liabilities	64,041	58,222
Short-term borrowings	5,378	7,062
Long-term debt	67,461	66,558
Interest payable	437	477
Unearned insurance premiums and service revenue	2,438	2,375
Accrued expenses and other liabilities	1,751	1,735
Total liabilities	141,506	136,429
Equity [Abstract]
Common stock and paid-in-capital	21,082	21,038
Preferred stock	813	1,255
Retained Earnings (Accumulated Deficit)	(7,158)	(6,828)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(122)	(66)
Treasury Stock, Value	(16)	0
Stockholders' Equity Attributable to Parent	14,599	15,399
Total liabilities and equity	156,105	151,828
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Finance receivables and loans, net	27,165	30,081
Allowance for loan losses	(191)	(179)
Total finance receivables and loans, net	26,974	29,902
Investment in operating leases, net	5,916	5,595
Other Assets	1,410	2,010
Total assets	34,300	37,507
Liabilities and Equity [Abstract]
Long-term debt	21,946	24,343
Accrued expenses and other liabilities	27	173
Total liabilities	$ 21,973	$ 24,516

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Paranthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,100,000,000	1,100,000,000
Common Stock, Shares, Issued	482,552,750	480,136,039
Common Stock, Shares, Outstanding	481,750,247	480,094,891
Treasury Stock, Shares	802,503	0

Consolidated Statement Of Chang

Consolidated Statement Of Changes In Equity - USD ($) $ in Millions		Total	Common stock and paid-in capital [Member]	Preferred stock [Member]	Retained earnings (accumulated deficit) [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2013		$ 14,208	$ 20,939	$ 1,255	$ (7,710)	$ (276)	$ 0
Net income (loss)		973			973
Preferred stock dividends		(200)			(200)
Employee Benefits and Share-based Compensation		83	83
Other comprehensive income (loss)		126				126
Ending Balance at Sep. 30, 2014		15,190	21,022	1,255	(6,937)	(150)	0
Beginning Balance at Dec. 31, 2014		15,399	21,038	1,255	(6,828)	(66)	0
Net income (loss)		1,026			1,026
Preferred stock dividends	[1]	(1,356)			(1,356)
Stock Repurchased During Period, Value		(325)		(325)
Preferred stock redemption		(117)		(117)
Employee Benefits and Share-based Compensation		44	44
Other comprehensive income (loss)		(56)				(56)
Share repurchases related to employee stock-based compensation awards		(16)					(16)
Ending Balance at Sep. 30, 2015		14,599	$ 21,082	$ 813	$ (7,158)	$ (122)	$ (16)
Stock Repurchase and Redemption Premium		$ 1,193
[1]	Preferred stock dividends for the nine months ended September 30, 2015, include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized. Refer to Note 16 for additional preferred stock information.

Consolidated Statement Of Cash

Consolidated Statement Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ 1,026	$ 973
Depreciation, Amortization and Accretion, Net	2,130	2,133
Provision for Loan Losses Expensed Including Discontinued Operations	467	302
Gain Loss on Sales of Loans Net Including Discontinued Operations	(45)	(6)
Available-for-sale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops	(106)	(129)
Gains (Losses) on Extinguishment of Debt	354	46
Payments for Origination and Purchases of Loans Held-for-sale	(1,594)	0
Proceeds from Sale of Loans Held-for-sale	1,580	59
Total Charge Recorded Related to ResCap Bankruptcy	0	(150)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	(452)	7
Deferred income taxes	406	174
Interest payable	(40)	(346)
Other assets	528	42
Other liabilities	(212)	(529)
Other, net	(88)	(118)
Net cash provided by (used in) operating activities	3,954	2,458
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of available-for-sale securities	(10,011)	(4,117)
Proceeds from sales of available-for-sale securities	4,408	2,974
Proceeds from maturities of available-for-sale securities	3,141	1,877
Net (increase) decrease in finance receivables and loans	(9,175)	(1,267)
Proceeds from Sale of Loans Held-for-investment	2,665	1,557
Purchases of operating lease assets	(3,423)	(7,770)
Disposals of operating lease assets	3,855	4,505
Proceeds from sale of business units, net	1,049	47
Increase (Decrease) in Restricted Cash	489	2,128
Other, net	(17)	71
Net cash (used in) provided by investing activities	(7,019)	5
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net change in short-term borrowings	(1,692)	(3,298)
Net increase in bank deposits	5,819	3,501
Proceeds from issuance of long-term debt	23,844	18,942
Repayments of long-term debt	(23,454)	(21,239)
Repurchase and Redemption of Preferred Stock	(442)	0
Dividends paid	(1,356)	(200)
Net cash provided by (used in) financing activities	2,719	(2,294)
Effect of exchange-rate changes on cash and cash equivalents	(3)	(1)
Cash and Cash Equivalents, Period Increase (Decrease)	(349)	168
Cash and cash equivalents at beginning of period	5,576	5,531
Cash and cash equivalents at end of period	5,227	5,699
Supplemental Cash Flow Information [Abstract]
Interest	1,825	2,380
Income taxes	95	13
Transfer of Portfolio Loans and Leases to Held-for-sale	777	1,602
Proceeds from sales and repayments of mortgage loans held-for-investment originally designated as held-for-sale	$ 61	$ 29

Description Of Business, Basis

Description Of Business, Basis Of Presentation, And Changes In Significant Accounting Policies	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]	Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies Ally Financial Inc. (referred to herein as Ally, we, our, or us) is a leading, independent, diversified financial services firm. Founded in 1919, we are a leading financial services company with more than 95 years of experience providing a broad array of financial products and services, primarily to automotive dealers and retail customers. We operate as a financial holding company (FHC) and a bank holding company (BHC). Our banking subsidiary, Ally Bank, is an indirect, wholly-owned subsidiary of Ally Financial Inc. and a leading franchise in the growing direct (internet, telephone, mobile, and mail) banking market . Our accounting and reporting policies conform to accounting principles generally accepted in the United States of America (GAAP). Additionally, where applicable, the policies conform to the accounting and reporting guidelines prescribed by bank regulatory authorities. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and that affect income and expenses during the reporting period and related disclosures. In developing the estimates and assumptions, management uses all available evidence; however, actual results could differ because of uncertainties associated with estimating the amounts, timing, and likelihood of possible outcomes. The Condensed Consolidated Financial Statements at September 30, 2015 , and for the three months and nine months ended September 30, 2015 , and 2014 , are unaudited but reflect all adjustments that are, in management’s opinion, necessary for the fair presentation of the results for the interim periods presented. All such adjustments are of a normal recurring nature. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements (and the related notes) included in our Annual Report on Form 10-K for the year ended December 31, 2014 , as filed on February 27, 2015 , with the U.S. Securities and Exchange Commission (SEC). Significant Accounting Policies Income Taxes In calculating the provision for interim income taxes, in accordance with Accounting Standards Codification (ASC) 740, Income Taxes , we apply an estimated annual effective tax rate to year-to-date ordinary income. At the end of each interim period, we estimate the effective tax rate expected to be applicable for the full fiscal year. This method differs from that described in Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K, which describes our annual significant income tax accounting policy and related methodology. Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K regarding additional significant accounting policies. Recently Adopted Accounting Standards Receivables — Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (ASU 2014-04) As of January 1, 2015, we adopted ASU (Accounting Standards Update) 2014-04. The amendments in this ASU clarify the timing for which an entity should reclassify a loan that has been foreclosed or where an in substance repossession has occurred to real estate owned. The guidance requires a reclassification to occur when the entity obtains legal title upon completion of foreclosure or the borrower conveys all interest in the residential real estate property to the entity to satisfy the loan through completion of a deed in lieu of foreclosure or similar legal agreement. In addition, the ASU clarifies that redemption rights of the borrower should be ignored for purposes of determining whether legal title has transferred. We adopted the guidance utilizing a modified retrospective approach. The adoption of this guidance did not have a material effect on our consolidated financial condition or results of operations. Presentation of Financial Statements and Property, Plant, and Equipment — Reporting Discontinued Operations and Disclosure of Disposals of Components of an Entity (ASU 2014-08) As of January 1, 2015, we adopted ASU 2014-08. The amendments in this ASU modify the requirements for the reporting of discontinued operations. In order to qualify as a discontinued operation, the disposal of a component of an entity, a group of components, or a business of an entity must represent a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. The ASU further indicates that the timing for recording a discontinued operation is when one of the following occurs: the component, group of components, or business meets the criteria to be classified as held-for-sale; the component, group of components, or business is disposed of by sale; or the component, group of components, or business is disposed of other than by sale (for example abandonment or spinoff). In addition, the ASU also requires additional disclosure items about an entity’s discontinued operations. The amendments were applied prospectively solely to newly identified disposals that qualify as discontinued operations after the effective date. Items previously reported as discontinued operations maintain their classification based on the prior guidance. The adoption of this guidance did not have a material effect on our consolidated financial condition or results of operations. Transfers and Servicing — Repurchase-to-Maturity Transactions, Repurchase Financings and Disclosures (ASU 2014-11) As of January 1, 2015, we adopted ASU 2014-11. The amendments in this ASU change the accounting for repurchase-to-maturity transactions and repurchase financing transactions such that both will be reported as secured borrowings. In addition to the changes to how these transactions are reported, the ASU also includes new disclosure requirements. The amendments were applied to all transactions that fall under the guidance as of the date of adoption with a cumulative effect adjustment recorded on the date of initial adoption. The adoption of this guidance did not have a material effect on our consolidated financial condition or results of operations. Recently Issued Accounting Standards Revenue from Contracts with Customers (ASU 2014-09) and Revenue from Contracts with Customers — Deferral of the Effective Date (ASU 2015-14) In May 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-09. The purpose of this guidance is to streamline and consolidate existing revenue recognition principles in GAAP and to converge revenue recognition principles with International Financial Reporting Standards (IFRS). The core principle of the amendments is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to receive in exchange for those goods or services. The amendments include a five step process for consideration of the main principle, guidance on the accounting treatment for costs associated with a contract, and disclosure requirements related to the revenue process. As originally issued, the amendments in ASU 2014-09 were to be effective for us beginning on January 1, 2017. However, in August 2015, the FASB issued ASU 2015-14, which deferred the effective date of the guidance for us until January 1, 2018, and permitted early adoption as of the original effective date in ASU 2014-09. The amendments to the revenue recognition principles can be applied on adoption either through a full retrospective application or on a modified basis with a cumulative effect adjustment on the date of initial adoption with certain practical expedients. Management is assessing the impact of the adoption of this guidance. Consolidation — Amendments to the Consolidation Analysis (ASU 2015-02) In February 2015, the FASB issued ASU 2015-02. The amendments in this update modify the requirements of consolidation with respect to entities that are or are similar in nature to limited partnerships or are variable interest entities (VIEs). For entities that are or are similar to limited partnerships, the guidance clarifies the evaluation of kick-out rights, removes the presumption that the general partner will consolidate and generally states that such entities will be presumed to be VIEs unless proven otherwise. For VIEs, the guidance modifies the analysis related to the evaluation of servicing fees, excludes servicing fees that are deemed commensurate with the level of service required from the determination of the primary beneficiary and clarifies certain considerations related to the consolidation analysis when performing a related party assessment. The amendments are effective for us on January 1, 2016, with early adoption permitted. The amendments can be applied either through a full retrospective application or on a modified retrospective basis with a cumulative effect adjustment on the date of initial adoption. Based on our preliminary assessment within our ongoing implementation efforts, we are not anticipating a material impact to our consolidated financial condition or results of operations upon adoption. Imputation of Interest — Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03) and Imputation of Interest — Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements (ASU 2015-15) In April 2015, the FASB issued ASU 2015-03. The amendments in this update require that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. Currently debt issuance costs are presented as a deferred charge and are therefore presented as an asset. The recognition and measurement requirements will not change as a result of this guidance. Additionally, in August 2015, the FASB issued ASU 2015-15 which codified comments made by the SEC that costs associated with revolving lines of credit may continue to be presented as an asset subsequent to the adoption of the guidance in ASU 2015-03. The amendments in ASU 2015-03 are effective for us on January 1, 2016, with early adoption permitted. The amendments must be applied with retrospective application, with each balance sheet period presented showing the impacts of applying the guidance. The guidance is not expected to have a material impact to our consolidated financial condition or results of operations.

Discontinued and Held-for-sale

Discontinued and Held-for-sale Operations	9 Months Ended
	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	Discontinued and Held-for-sale Operations Discontinued Operations Prior to the adoption of ASU 2014-08, which is to be prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income . The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted. Select Automotive Finance Operations During the fourth quarter of 2012, we committed to sell our automotive finance operations in Europe and Latin America to General Motors Financial Company, Inc. (GMF). On the same date, we entered into an agreement with GMF to sell our 40% interest in a motor vehicle finance joint venture in China. During the second quarter of 2013, we completed the sale of our operations in Europe and the majority of Latin America. The transaction included European operations in Germany, the United Kingdom, Italy, Sweden, Switzerland, Austria, Belgium, France and the Netherlands, and Latin America operations in Mexico, Chile, and Colombia. During the fourth quarter of 2013, we completed the sale of our Latin American operations in Brazil. On January 2, 2015, the sale of our interest in the motor vehicle finance joint venture in China was completed and an after-tax gain of approximately $400 million was recorded. The tax expense included in this gain was reduced by the release of the valuation allowance on our capital loss carryforward deferred tax asset that was utilized to offset capital gains stemming from this sale. Other Operations Other operations relate to previous discontinued operations for which we continue to have minimal residual costs. Select Financial Information Select financial information of discontinued operations is summarized below. The pretax income or loss, including direct costs to transact a sale, includes any impairment recognized to present the operations at the lower-of-cost or fair value. Fair value was based on the estimated sales price, which could differ from the ultimate sales price due to price volatility, changing interest rates, changing foreign-currency rates, and future economic conditions. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Select Automotive Finance operations Total net revenue $ — $ 29 $ — $ 95 Pretax (loss) income including direct costs to transact a sale (a) (1 ) 46 452 101 Tax expense (b) 3 — 68 4 Other operations Pretax (loss) income $ (1 ) $ 5 $ 19 $ 25 Tax benefit — (79 ) (2 ) (77 ) (a) Includes certain treasury and other corporate activity recognized by Corporate and Other. (b) Includes certain income tax activity recognized by Corporate and Other. Held-for-sale Operations Assets of operations held-for-sale consisted of $634 million in other assets at December 31, 2014 related to the joint venture in China that was sold to GMF on January 2, 2015. No held-for-sale operations remain at September 30, 2015 .

Other Income, Net Of Losses

Other Income, Net Of Losses	9 Months Ended
	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Other Income, Net of Losses [Text Block]	Other Income, Net of Losses Details of other income, net of losses, were as follows. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Remarketing fees $ 25 $ 28 $ 78 $ 85 Late charges and other administrative fees 23 23 66 66 Income from equity-method investments 11 5 48 13 Other, net 21 22 59 50 Total other income, net of losses $ 80 $ 78 $ 251 $ 214

Other Operating Expenses

Other Operating Expenses	9 Months Ended
	Sep. 30, 2015
Operating Expenses [Abstract]
Other Operating Expenses [Text Block]	Other Operating Expenses Details of other operating expenses were as follows. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Insurance commissions $ 95 $ 95 $ 283 $ 279 Technology and communications 65 77 198 255 Lease and loan administration 31 32 92 92 Advertising and marketing 26 27 80 81 Professional services 23 20 68 73 Premises and equipment depreciation 20 23 62 61 Regulatory and licensing fees 18 23 59 69 Vehicle remarketing and repossession 20 22 56 61 Occupancy 13 12 38 34 Non-income taxes 11 12 26 32 Other 56 61 166 176 Total other operating expenses $ 378 $ 404 $ 1,128 $ 1,213

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Investment Securities [Text Block]	Investment Securities Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, and other investments. The cost, fair value, and gross unrealized gains and losses on available-for-sale securities were as follows. September 30, 2015 December 31, 2014 Amortized cost Gross unrealized Fair Amortized cost Gross unrealized Fair ($ in millions) gains losses gains losses Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 1,805 $ 5 $ (1 ) $ 1,809 $ 1,195 $ 1 $ (18 ) $ 1,178 U.S. States and political subdivisions 635 17 (1 ) 651 389 17 — 406 Foreign government 176 8 — 184 224 8 — 232 Mortgage-backed residential (a) 11,560 130 (76 ) 11,614 10,431 119 (125 ) 10,425 Mortgage-backed commercial 519 — (2 ) 517 254 — (1 ) 253 Asset-backed 1,947 6 (2 ) 1,951 1,989 5 (3 ) 1,991 Corporate debt 1,043 13 (9 ) 1,047 734 14 (2 ) 746 Total debt securities (b) (c) 17,685 179 (91 ) 17,773 15,216 164 (149 ) 15,231 Equity securities 1,097 1 (113 ) 985 891 49 (34 ) 906 Total available-for-sale securities $ 18,782 $ 180 $ (204 ) $ 18,758 $ 16,107 $ 213 $ (183 ) $ 16,137 (a) Residential mortgage-backed securities include agency-backed bonds totaling $8,536 million and $7,557 million at September 30, 2015 , and December 31, 2014 , respectively. (b) Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. Amounts deposited totaled $15 million at both September 30, 2015 , and December 31, 2014 . (c) Investment securities with a fair value of $1,702 million and $801 million at September 30, 2015 , and December 31, 2014 , were pledged to secure short-term borrowings or repurchase agreements and for other purposes as required by contractual obligation or law. Under these agreements, Ally has granted the counterparty the right to sell or pledge the underlying investment securities. The maturity distribution of available-for-sale debt securities outstanding is summarized in the following tables. Prepayments may cause actual maturities to differ from contractual maturities. Total Due in one year or less Due after one year through five years Due after five years through ten years Due after ten years (a) ($ in millions) Amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2015 Fair value of available-for-sale debt securities U.S. Treasury and federal agencies $ 1,809 1.6 % $ 7 5.0 % $ 905 1.2 % $ 897 2.1 % $ — — % U.S. States and political subdivisions 651 3.3 53 2.2 48 2.2 130 2.9 420 3.7 Foreign government 184 2.6 9 1.4 82 2.7 93 2.7 — — Mortgage-backed residential 11,614 2.8 — — 38 2.1 40 2.5 11,536 2.8 Mortgage-backed commercial 517 1.9 — — — — 3 2.7 514 1.9 Asset-backed 1,951 2.1 4 1.4 1,189 2.0 553 2.4 205 2.2 Corporate debt 1,047 2.9 48 3.1 601 2.5 368 3.3 30 5.5 Total available-for-sale debt securities $ 17,773 2.6 $ 121 2.6 $ 2,863 1.9 $ 2,084 2.5 $ 12,705 2.8 Amortized cost of available-for-sale debt securities $ 17,685 $ 120 $ 2,854 $ 2,067 $ 12,644 December 31, 2014 Fair value of available-for-sale debt securities U.S. Treasury and federal agencies $ 1,178 1.5 % $ 7 3.0 % $ 677 1.2 % $ 494 1.9 % $ — — % U.S. States and political subdivisions 406 3.7 34 1.9 12 2.1 106 3.0 254 4.3 Foreign government 232 2.7 — — 128 2.5 104 2.9 — — Mortgage-backed residential 10,425 2.6 34 3.1 58 2.1 — — 10,333 2.6 Mortgage-backed commercial 253 1.5 — — 30 1.8 — — 223 1.4 Asset-backed 1,991 1.9 — — 1,311 1.9 463 2.0 217 2.2 Corporate debt 746 3.2 33 3.1 460 2.7 216 3.8 37 5.6 Total available-for-sale debt securities $ 15,231 2.5 $ 108 2.7 $ 2,676 1.9 $ 1,383 2.4 $ 11,064 2.6 Amortized cost of available-for-sale debt securities $ 15,216 $ 108 $ 2,674 $ 1,374 $ 11,060 (a) Actual maturities may differ from contractual maturities due to call or prepayment options. The balances of cash equivalents were $1.3 billion and $2.0 billion at September 30, 2015 , and December 31, 2014 , respectively, and were composed primarily of money market accounts and short-term securities, including U.S. Treasury bills. The following table presents interest and dividends on available-for-sale securities. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Taxable interest $ 90 $ 87 $ 252 $ 256 Taxable dividends 7 6 18 18 Interest and dividends exempt from U.S. federal income tax 5 1 13 8 Interest and dividends on available-for-sale securities $ 102 $ 94 $ 283 $ 282 The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Gross realized gains $ 28 $ 48 $ 134 $ 150 Gross realized losses (11 ) (3 ) (14 ) (11 ) Other-than-temporary impairment (11 ) — (14 ) (10 ) Other gain on investments, net $ 6 $ 45 $ 106 $ 129 Certain available-for-sale securities were sold at a loss in 2015 and 2014 as a result of market conditions within these respective periods (e.g., a downgrade in the rating of a debt security), in accordance with our risk management policies and practices. The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the methodology that was applied to these securities, we believe that the unrealized losses relate to factors other than credit losses in the current market environment. As of September 30, 2015 , we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As of September 30, 2015 , we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at September 30, 2015 . Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments. September 30, 2015 December 31, 2014 Less than 12 months 12 months or longer Less than 12 months 12 months or longer ($ in millions) Fair Unrealized Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 220 $ — $ 373 $ (1 ) $ 297 $ (3 ) $ 859 $ (15 ) U.S. States and political subdivisions 173 (1 ) — — 50 — — — Foreign government 9 — — — — — — — Mortgage-backed 1,731 (11 ) 2,517 (67 ) 1,172 (10 ) 3,098 (116 ) Asset-backed 696 (2 ) 24 — 819 (3 ) 8 — Corporate debt 449 (8 ) 10 (1 ) 132 (2 ) 11 — Total temporarily impaired debt securities 3,278 (22 ) 2,924 (69 ) 2,470 (18 ) 3,976 (131 ) Temporarily impaired equity securities 793 (84 ) 68 (29 ) 231 (24 ) 40 (10 ) Total temporarily impaired available-for-sale securities $ 4,071 $ (106 ) $ 2,992 $ (98 ) $ 2,701 $ (42 ) $ 4,016 $ (141 )

Loans Held-for-Sale, Net Loans

Loans Held-for-Sale, Net Loans Held-for-Sale, Net	9 Months Ended
	Sep. 30, 2015
Loans Held-for-Sale, Net [Abstract]
Loans Held-for-Sale, Net [Text Block]	Loans Held-for-Sale, Net Loans held-for-sale represent loans that we intend to sell. In situations where we have not identified the specific loans to be sold, we may classify a percentage of the entire loan balance as held-for-investment and a percentage as held-for-sale based on an allocation methodology of loans with similar characteristics. In addition, we may also designate a portion of our originations as held-for-sale based on a similar allocation methodology. The composition of loans held-for-sale, net, was as follows. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive $ — $ 1,515 Consumer mortgage — 452 Commercial and industrial — Other 37 36 Total loans held-for-sale, net $ 37 $ 2,003

Finance Receivables And Loans,

Finance Receivables And Loans, Net	9 Months Ended
	Sep. 30, 2015
Loans and Leases Receivable, Net Reported Amount, by Category Alternative [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Finance Receivables and Loans, Net The composition of finance receivables and loans, net, reported at carrying value before allowance for loan losses was as follows. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive (a) $ 63,610 $ 56,570 Consumer mortgage (b)(c) 9,770 7,474 Commercial Commercial and industrial Automotive 29,020 30,871 Other 2,289 1,882 Commercial real estate — Automotive 3,302 3,151 Total commercial 34,611 35,904 Total finance receivables and loans (d) $ 107,991 $ 99,948 (a) Includes $107 million and $35 million of fair value adjustment for loans in hedge accounting relationships at September 30, 2015 , and December 31, 2014 , respectively. Refer to Note 20 for additional information. (b) Includes loans originated as interest-only mortgage loans of $1.0 billion and $1.2 billion at September 30, 2015 , and December 31, 2014 , respectively, 8% of which are expected to start principal amortization in the remainder of 2015, 33% in 2016, 21% in 2017, 2% in 2018, and 4% thereafter. (c) Includes consumer mortgages at a fair value of $1 million at both September 30, 2015 , and December 31, 2014 , as a result of fair value option election. (d) Totals include a net increase of $43 million at September 30, 2015 , compared to a net reduction of $266 million at December 31, 2014 , for unearned income, unamortized premiums and discounts, and deferred fees and costs. The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans. Three months ended September 30, 2015 ( $ in millions ) Consumer Consumer Commercial Total Allowance at July 1, 2015 $ 767 $ 119 $ 88 $ 974 Charge-offs (220 ) (10 ) (1 ) (231 ) Recoveries 64 4 2 70 Net charge-offs (156 ) (6 ) 1 (161 ) Provision for loan losses 200 6 5 211 Other (a) (7 ) — 1 (6 ) Allowance at September 30, 2015 $ 804 $ 119 $ 95 $ 1,018 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Three months ended September 30, 2014 ( $ in millions ) Consumer Consumer Commercial Total Allowance at July 1, 2014 $ 729 $ 302 $ 140 $ 1,171 Charge-offs (188 ) (13 ) — (201 ) Recoveries 51 1 — 52 Net charge-offs (137 ) (12 ) — (149 ) Provision for loan losses 112 (7 ) (3 ) 102 Other (a) (11 ) — — (11 ) Allowance at September 30, 2014 $ 693 $ 283 $ 137 $ 1,113 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Nine months ended September 30, 2015 ( $ in millions ) Consumer Consumer Commercial Total Allowance at January 1, 2015 $ 685 $ 152 $ 140 $ 977 Charge-offs (579 ) (41 ) (1 ) (621 ) Recoveries 195 12 3 210 Net charge-offs (384 ) (29 ) 2 (411 ) Provision for loan losses 510 4 (47 ) 467 Other (a) (7 ) (8 ) — (15 ) Allowance at September 30, 2015 $ 804 $ 119 $ 95 $ 1,018 Allowance for loan losses at September 30, 2015 Individually evaluated for impairment $ 22 $ 48 $ 19 $ 89 Collectively evaluated for impairment 782 71 76 929 Loans acquired with deteriorated credit quality — — — — Finance receivables and loans at historical cost at September 30, 2015 Ending balance $ 63,610 $ 9,769 $ 34,611 $ 107,990 Individually evaluated for impairment 285 268 75 628 Collectively evaluated for impairment 63,325 9,501 34,536 107,362 Loans acquired with deteriorated credit quality — — — — (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Nine months ended September 30, 2014 ( $ in millions ) Consumer Consumer Commercial Total Allowance at January 1, 2014 $ 673 $ 389 $ 146 $ 1,208 Charge-offs (511 ) (38 ) (5 ) (554 ) Recoveries 170 6 11 187 Net charge-offs (341 ) (32 ) 6 (367 ) Provision for loan losses 372 (55 ) (15 ) 302 Other (a) (11 ) (19 ) — (30 ) Allowance at September 30, 2014 $ 693 $ 283 $ 137 $ 1,113 Allowance for loan losses at September 30, 2014 Individually evaluated for impairment $ 25 $ 180 $ 15 $ 220 Collectively evaluated for impairment 668 103 122 893 Loans acquired with deteriorated credit quality — — — — Finance receivables and loans at historical cost at September 30, 2014 Ending balance $ 58,675 $ 7,594 $ 33,248 $ 99,517 Individually evaluated for impairment 289 904 73 1,266 Collectively evaluated for impairment 58,384 6,690 33,175 98,249 Loans acquired with deteriorated credit quality 2 — — 2 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. The following table presents information about significant sales of finance receivables and loans recorded at historical cost and transfers of finance receivables and loans from held-for-investment to held-for-sale. Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Consumer automotive $ 704 $ 1,562 $ 704 $ 1,562 Consumer mortgage 2 — 75 40 Commercial 1 — 1 — Total sales and transfers $ 707 $ 1,562 $ 780 $ 1,602 The following table presents information about significant purchases of finance receivables and loans. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Consumer automotive $ 272 $ — $ 272 $ — Consumer mortgage 990 83 3,640 98 Total purchases of finance receivables and loans $ 1,262 $ 83 $ 3,912 $ 98 The following table presents an analysis of our past due finance receivables and loans, net, recorded at historical cost reported at carrying value before allowance for loan losses. ( $ in millions ) 30-59 days 60-89 days 90 days Total Current Total finance September 30, 2015 Consumer automotive $ 1,439 $ 310 $ 180 $ 1,929 $ 61,681 $ 63,610 Consumer mortgage 101 19 88 208 9,561 9,769 Commercial Commercial and industrial Automotive — — 6 6 29,014 29,020 Other — — — — 2,289 2,289 Commercial real estate — Automotive — — — — 3,302 3,302 Total commercial — — 6 6 34,605 34,611 Total consumer and commercial $ 1,540 $ 329 $ 274 $ 2,143 $ 105,847 $ 107,990 December 31, 2014 Consumer automotive $ 1,340 $ 293 $ 164 $ 1,797 $ 54,773 $ 56,570 Consumer mortgage 76 25 124 225 7,248 7,473 Commercial Commercial and industrial Automotive — 9 — 9 30,862 30,871 Other — — — — 1,882 1,882 Commercial real estate — Automotive — — — — 3,151 3,151 Total commercial — 9 — 9 35,895 35,904 Total consumer and commercial $ 1,416 $ 327 $ 288 $ 2,031 $ 97,916 $ 99,947 The following table presents the carrying value before allowance for loan losses of our finance receivables and loans recorded at historical cost on nonaccrual status. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive $ 413 $ 386 Consumer mortgage 149 177 Commercial Commercial and industrial Automotive 26 32 Other 45 46 Commercial real estate — Automotive 4 4 Total commercial 75 82 Total consumer and commercial finance receivables and loans $ 637 $ 645 Management performs ongoing analysis of the consumer automotive, consumer mortgage, and commercial portfolios using a range of credit quality indicators to assess the adequacy of the allowance for loan losses based on historical and current trends. The following tables present the population of loans by quality indicators for our consumer automotive, consumer mortgage, and commercial portfolios. The following table presents performing and nonperforming credit quality indicators in accordance with our internal accounting policies for our consumer finance receivables and loans recorded at historical cost reported at carrying value before allowance for loan losses. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is determined not to be probable. Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information. September 30, 2015 December 31, 2014 ( $ in millions ) Performing Nonperforming Total Performing Nonperforming Total Consumer automotive $ 63,197 $ 413 $ 63,610 $ 56,184 $ 386 $ 56,570 Consumer mortgage 9,620 149 9,769 7,296 177 7,473 The following table presents pass and criticized credit quality indicators based on regulatory definitions for our commercial finance receivables and loans recorded at historical cost reported at carrying value before allowance for loan losses. September 30, 2015 December 31, 2014 ( $ in millions ) Pass Criticized (a) Total Pass Criticized (a) Total Commercial Commercial and industrial Automotive $ 27,423 $ 1,597 $ 29,020 $ 29,150 $ 1,721 $ 30,871 Other 1,856 433 2,289 1,509 373 1,882 Commercial real estate — Automotive 3,156 146 3,302 3,015 136 3,151 Total commercial $ 32,435 $ 2,176 $ 34,611 $ 33,674 $ 2,230 $ 35,904 (a) Includes loans classified as special mention, substandard, or doubtful. These classifications are based on regulatory definitions and generally represent loans within our portfolio that have a higher default risk or have already defaulted. Impaired Loans and Troubled Debt Restructurings Impaired Loans Loans are considered impaired when we determine it is probable that we will be unable to collect all amounts due according to the terms of the loan agreement. For more information on our impaired finance receivables and loans, refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K. The following table presents information about our impaired finance receivables and loans recorded at historical cost. ( $ in millions ) Unpaid principal balance Carrying value before allowance Impaired with no allowance Impaired with an allowance Allowance for impaired loans September 30, 2015 Consumer automotive $ 285 $ 285 $ — $ 285 $ 22 Consumer mortgage 271 268 63 205 48 Commercial Commercial and industrial Automotive 26 26 9 17 4 Other 45 45 — 45 15 Commercial real estate — Automotive 4 4 4 — — Total commercial 75 75 13 62 19 Total consumer and commercial finance receivables and loans $ 631 $ 628 $ 76 $ 552 $ 89 December 31, 2014 Consumer automotive $ 282 $ 282 $ — $ 282 $ 23 Consumer mortgage 340 336 86 250 62 Commercial Commercial and industrial Automotive 32 32 4 28 5 Other 46 46 — 46 15 Commercial real estate — Automotive 4 4 1 3 1 Total commercial 82 82 5 77 21 Total consumer and commercial finance receivables and loans $ 704 $ 700 $ 91 $ 609 $ 106 The following tables present average balance and interest income for our impaired finance receivables and loans. 2015 2014 Three months ended September 30, ( $ in millions ) Average Interest Average Interest Consumer automotive $ 288 $ 4 $ 297 $ 5 Consumer mortgage 268 3 914 7 Commercial Commercial and industrial Automotive 36 — 32 — Other 45 — 51 — Commercial real estate — Automotive 6 — 3 — Total commercial 87 — 86 — Total consumer and commercial finance receivables and loans $ 643 $ 7 $ 1,297 $ 12 2015 2014 Nine months ended September 30, ($ in millions) Average Interest Average Interest Consumer automotive $ 291 $ 13 $ 298 $ 14 Consumer mortgage 283 7 923 22 Commercial Commercial and industrial Automotive 35 1 68 1 Other 39 3 62 4 Commercial real estate — Automotive 5 — 7 — Total commercial 79 4 137 5 Total consumer and commercial finance receivables and loans $ 653 $ 24 $ 1,358 $ 41 Troubled Debt Restructurings Troubled Debt Restructurings (TDRs) are loan modifications where concessions were granted to borrowers experiencing financial difficulties. For automotive loans, we may offer several types of assistance to aid our customers, including extension of the loan maturity date and rewriting the loan terms. Additionally, numerous initiatives are in place to provide support to our mortgage customers in financial distress, including principal forgiveness, maturity extensions, delinquent interest capitalization, and changes to contractual interest rates. Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information. Total TDRs recorded at historical cost and reported at carrying value before allowance for loan losses were $601 million and $681 million at September 30, 2015 , and December 31, 2014 , respectively. The decrease was primarily due to the whole-loan sale of consumer mortgage TDRs during the first quarter of 2015. The following tables present information related to finance receivables and loans recorded at historical cost modified in connection with a TDR during the period. 2015 2014 Three months ended September 30, ( $ in millions ) Number of Pre-modification Post-modification Number of Pre-modification Post-modification Consumer automotive 4,612 $ 75 $ 66 4,361 $ 72 $ 63 Consumer mortgage 53 13 13 37 7 6 Commercial Commercial and industrial Automotive — — — — — — Other 1 21 21 — — — Commercial real estate — Automotive 1 3 3 — — — Total commercial 2 24 24 — — — Total consumer and commercial finance receivables and loans 4,667 $ 112 $ 103 4,398 $ 79 $ 69 2015 2014 Nine months ended September 30, ( $ in millions) Number of Pre-modification Post-modification Number of Pre-modification Post-modification Consumer automotive 12,763 $ 202 $ 173 13,681 $ 223 $ 193 Consumer mortgage 169 42 40 350 71 66 Commercial Commercial and industrial Automotive — — — 3 23 23 Other 1 21 21 3 48 48 Commercial real estate — Automotive 1 3 3 — — — Total commercial 2 24 24 6 71 71 Total consumer and commercial finance receivables and loans 12,934 $ 268 $ 237 14,037 $ 365 $ 330 The following tables present information about finance receivables and loans recorded at historical cost that have redefaulted during the reporting period and were within 12 months or less of being modified as a TDR. Redefault is when finance receivables and loans meet the requirements for evaluation under our charge-off policy (Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information) except for commercial finance receivables and loans, where redefault is defined as 90 days past due. 2015 2014 Three months ended September 30, ( $ in millions ) Number of Carrying value Charge-off amount Number of Carrying value Charge-off amount Consumer automotive 1,742 $ 21 $ 12 1,790 $ 22 $ 12 Consumer mortgage 2 1 — 5 1 — Commercial — — — — — — Total consumer and commercial finance receivables and loans 1,744 $ 22 $ 12 1,795 $ 23 $ 12 2015 2014 Nine months ended September 30, ( $ in millions ) Number of Carrying value Charge-off amount Number of Carrying value Charge-off amount Consumer automotive 4,822 $ 58 $ 33 5,020 $ 62 $ 33 Consumer mortgage 9 1 — 10 2 — Commercial — — — — — — Total consumer and commercial finance receivables and loans 4,831 $ 59 $ 33 5,030 $ 64 $ 33 At September 30, 2015 , and December 31, 2014 , commercial commitments to lend additional funds to borrowers owing receivables whose terms had been modified in a TDR were $2 million and $4 million , respectively.

Investment In Operating Leases,

Investment In Operating Leases, Net	9 Months Ended
	Sep. 30, 2015
Leases, Operating [Abstract]
Operating Leases of Lessor Disclosure [Text Block]	Investment in Operating Leases, Net Investments in operating leases were as follows. ($ in millions) September 30, 2015 December 31, 2014 Vehicles $ 21,270 $ 23,144 Accumulated depreciation (3,978 ) (3,634 ) Investment in operating leases, net $ 17,292 $ 19,510 Depreciation expense on operating lease assets includes remarketing gains and losses recognized on the sale of operating lease assets. The following summarizes the components of depreciation expense on operating lease assets. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Depreciation expense on operating lease assets (excluding remarketing gains) $ 633 $ 654 $ 1,995 $ 1,982 Remarketing gains (105 ) (105 ) (282 ) (382 ) Depreciation expense on operating lease assets $ 528 $ 549 $ 1,713 $ 1,600

Securitizations And Variable In

Securitizations And Variable Interest Entities	9 Months Ended
	Sep. 30, 2015
Securitizations And Variable Interest Entities [Abstract]
Securitizations And Variable Interest Entities Disclosure [Text Block]	Securitizations and Variable Interest Entities We are involved in several types of securitization and financing transactions that utilize special-purpose entities (SPEs). A SPE is an entity that is designed to fulfill a specified limited need of the sponsor. Our principal use of SPEs is to obtain liquidity by securitizing certain of our financial assets and operating lease assets. The SPEs involved in our securitization and other financing transactions are generally considered VIEs. VIEs are entities that have either a total equity investment at risk that is insufficient to permit the entity to finance its activities without additional subordinated financial support or whose equity investors at risk lack the ability to control the entity's activities. We provide a wide range of consumer and commercial automotive loans, operating leases, and commercial loans to a diverse customer base. We often securitize these loans (also referred to as financial assets) and leases through the use of securitization entities, which may or may not be consolidated on our Condensed Consolidated Balance Sheet . The pretax loss recognized on sales of financial assets into nonconsolidated securitization trusts and similar asset-backed financing entities for consumer automotive was $3 million for the three months and nine months ended September 30, 2015 . We provide long-term guarantee contracts to investors in certain nonconsolidated affordable housing entities and have extended a line of credit to provide liquidity and minimize our exposure under these contracts. Since we do not have control over the entities or the power to make decisions, we do not consolidate the entities and our involvement is limited to the guarantee and the line of credit. We have involvement with various other nonconsolidated equity investments, including affordable housing entities and venture capital funds and loan funds. We do not consolidate these entities and our involvement is limited to our outstanding investment, additional capital committed to these funds plus any previously recognized low income housing tax credits that are subject to recapture. Refer to Note 10 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for further description of our securitization activities and our involvement with VIEs. Our involvement with consolidated and nonconsolidated VIEs in which we hold variable interests is presented below. ($ in millions) Consolidated Assets of Maximum exposure to September 30, 2015 On-balance sheet variable interest entities Consumer automotive $ 29,429 (b) Commercial automotive 15,118 Off-balance sheet variable interest entities Consumer automotive — $ 2,870 $ 2,870 (c) Commercial other 197 (d) — (e) 445 (f) Total $ 44,744 $ 2,870 $ 3,315 December 31, 2014 On-balance sheet variable interest entities Consumer automotive $ 31,994 (b) Commercial automotive 18,171 Off-balance sheet variable interest entities Consumer automotive — $ 2,801 $ 2,801 (c) Commercial other 146 (d) — (e) 362 (f) Total $ 50,311 $ 2,801 $ 3,163 (a) Asset values represent the current unpaid principal balance of outstanding consumer finance receivables and loans within the VIEs. (b) Includes $10.2 billion and $12.7 billion of assets that are not encumbered by VIE beneficial interests held by third parties at September 30, 2015 , and December 31, 2014 , respectively. Ally or consolidated affiliates hold the interests in these assets which eliminate in consolidation. (c) Maximum exposure to loss represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions. This measure is based on the unlikely event that all of the loans have underwriting defects or other defects that trigger a representation and warranty provision and the collateral supporting the loans are worthless. This required disclosure is not an indication of our expected loss. (d) Includes $211 million and $164 million classified as other assets, offset by $14 million and $18 million classified as accrued expenses and other liabilities at September 30, 2015 , and December 31, 2014 , respectively. (e) Includes VIEs for which we have no management oversight and therefore we are not able to provide the total assets of the VIEs. (f) For certain nonconsolidated affordable housing entities, maximum exposure to loss represents the yield we guaranteed investors through long term guarantee contracts. The amount disclosed is based on the unlikely event that the underlying properties cease generating yield to investors and the yield delivered to investors in the form of low income tax housing credits is recaptured. For nonconsolidated equity investments, maximum exposure to loss represents our outstanding investment, additional committed capital, and low income housing tax credits subject to recapture. The amount disclosed is based on the unlikely event that our committed capital is funded, our investments become worthless, and the tax credits previously delivered to us are recaptured. This required disclosure is not an indication of our expected loss. Cash Flows with Off-balance Sheet Variable Interest Entities The following table summarizes cash flows received and paid related to securitization entities and asset-backed financings where the transfer is accounted for as a sale and we have a continuing involvement with the transferred assets (e.g., servicing) that were outstanding during the nine months ended September 30, 2015 , and 2014 . Additionally, this table contains information regarding cash flows received from and paid to nonconsolidated securitization entities that existed during each period. Nine months ended September 30, ( $ in millions ) Consumer automotive Consumer mortgage 2015 Cash proceeds from transfers completed during the period $ 1,044 $ — Servicing fees 21 — 2014 Cash proceeds from transfers completed during the period $ 1,557 $ — Servicing fees 6 — Representations and warranties obligations — (9 ) Delinquencies and Net Credit Losses The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses. Total Amount Amount 60 days or more past due ($ in millions) September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 On-balance sheet loans Consumer automotive $ 63,610 $ 58,085 $ 490 $ 457 Consumer mortgage 9,770 7,926 107 151 Commercial automotive 32,322 34,022 6 9 Commercial other 2,326 1,918 — — Total on-balance sheet loans 108,028 101,951 603 617 Off-balance sheet securitization entities Consumer automotive 2,870 2,801 8 5 Total off-balance sheet securitization entities 2,870 2,801 8 5 Whole-loan transactions (a) 2,030 929 15 33 Total $ 112,928 $ 105,681 $ 626 $ 655 (a) Whole-loan transactions are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors. Net credit losses Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 On-balance sheet loans Consumer automotive $ 156 $ 137 $ 384 $ 341 Consumer mortgage 6 12 29 32 Commercial automotive — — — 1 Commercial other (1 ) — (2 ) (7 ) Total on-balance sheet loans 161 149 411 367 Off-balance sheet securitization entities Consumer automotive 1 — 3 1 Total off-balance sheet securitization entities 1 — 3 1 Whole-loan transactions — 1 — 5 Total $ 162 $ 150 $ 414 $ 373

Servicing Activities

Servicing Activities	9 Months Ended
	Sep. 30, 2015
Servicing Activities [Abstract]
Servicing Activities [Text Block]	Servicing Activities Automotive Finance Servicing Activities We service consumer automotive contracts. Historically, we have sold a portion of our consumer automotive contracts. With respect to contracts we sell, we retain the right to service and earn a servicing fee for our servicing function. Typically, we conclude that the fee we are paid for servicing consumer automotive finance receivables represents adequate compensation, and consequently, we do not recognize a servicing asset or liability. We recognized automotive servicing fee income of $12 million and $32 million during the three months and nine months ended September 30, 2015 , respectively, compared to $6 million and $22 million during the three months and nine months ended September 30, 2014 . Automotive Finance Serviced Assets The current unpaid principal balance and any related unamortized deferred fees and costs of total serviced automotive finance loans and leases outstanding were as follows. ($ in millions) September 30, 2015 December 31, 2014 On-balance sheet automotive finance loans and leases Consumer automotive $ 63,352 $ 58,085 Commercial automotive 32,322 34,022 Operating leases 16,955 19,510 Other 61 55 Off-balance sheet automotive finance loans Loans sold to third-party investors Securitizations 2,901 2,832 Whole-loan 2,027 887 Total serviced automotive finance loans and leases $ 117,618 $ 115,391

Other Assets

Other Assets	9 Months Ended
	Sep. 30, 2015
Other Assets [Abstract]
Other Assets Disclosure [Text Block]	Other Assets The components of other assets were as follows. ($ in millions) September 30, 2015 December 31, 2014 Property and equipment at cost $ 648 $ 775 Accumulated depreciation (436 ) (550 ) Net property and equipment 212 225 Restricted cash collections for securitization trusts (a) 1,791 2,221 Net deferred tax assets 1,459 1,812 Nonmarketable equity securities 313 271 Fair value of derivative contracts in receivable position (b) 299 263 Cash reserve deposits held-for-securitization trusts (c) 255 303 Unamortized debt issuance costs 230 238 Other accounts receivable 196 298 Collateral placed with counterparties 72 236 Other assets 1,197 1,435 Total other assets $ 6,024 $ 7,302 (a) Represents cash collections from customer payments on securitized receivables. These funds are distributed to investors as payments on the related secured debt. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . (c) Represents credit enhancement in the form of cash reserves for various securitization transactions.

Deposit Liabilities

Deposit Liabilities	9 Months Ended
	Sep. 30, 2015
Deposits [Abstract]
Deposit Liabilities Disclosures [Text Block]	Deposit Liabilities Deposit liabilities consisted of the following. ( $ in millions ) September 30, 2015 December 31, 2014 Noninterest-bearing deposits $ 91 $ 64 Interest-bearing deposits Savings and money market checking accounts 33,839 26,769 Certificates of deposit 29,864 31,070 Dealer deposits 247 319 Total deposit liabilities $ 64,041 $ 58,222 At September 30, 2015 , and December 31, 2014 , certificates of deposit included $12.0 billion and $13.0 billion , respectively, of certificates of deposit in denominations of $100 thousand or more.

Short-Term Borrowings

Short-Term Borrowings	9 Months Ended
	Sep. 30, 2015
Short-term Debt [Abstract]
Short-term Debt [Text Block]	Short-term Borrowings The following table presents the composition of our short-term borrowings portfolio. September 30, 2015 December 31, 2014 ($ in millions) Unsecured Secured (a) Total Unsecured Secured (a) Total Demand notes $ 3,374 $ — $ 3,374 $ 3,338 $ — $ 3,338 Federal Home Loan Bank — 400 400 — 2,950 2,950 Securities sold under agreements to repurchase — 1,520 1,520 — 774 774 Other 84 — 84 — — — Total short-term borrowings $ 3,458 $ 1,920 $ 5,378 $ 3,338 $ 3,724 $ 7,062 (a) Refer to Note 14 for further details on assets restricted as collateral for payment of the related debt. We periodically enter into term repurchase agreements, short-term borrowing agreements in which we sell financial instruments to one or more investors while simultaneously committing to repurchase them at a specified future date, at the stated price plus accrued interest. As of September 30, 2015 , the financial instruments sold under agreement to repurchase consisted of mortgage-backed residential securities with the following maturities: $1,371 million within the next 30 days and $149 million in greater than 90 days. Refer to Note 5 and Note 23 for further details on investment securities sold under agreements to repurchase. The primary risk associated with these repurchase agreements is that the counterparty will be unable to perform under the terms of the contract. As the borrower, Ally is exposed to the excess market value of the securities pledged over the amount borrowed. Daily mark-to-market collateral management is designed to limit this risk to the initial margin. However, should a counterparty declare bankruptcy or become insolvent, Ally may incur additional delays and costs. As of September 30, 2015 , we received cash collateral totaling $4 million from counterparties under these collateral arrangements associated with our repurchase agreements.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2015
Long-term Debt, Unclassified [Abstract]
Long-term Debt [Text Block]	Long-term Debt The following table presents the composition of our long-term debt portfolio. September 30, 2015 December 31, 2014 ($ in millions) Unsecured Secured Total Unsecured Secured Total Long-term debt Due within one year $ 1,848 $ 11,565 $ 13,413 $ 4,809 $ 12,629 $ 17,438 Due after one year (a) 17,407 36,196 53,603 17,154 31,514 48,668 Fair value adjustment (b) 445 — 445 452 — 452 Total long-term debt (c) $ 19,700 $ 47,761 $ 67,461 $ 22,415 $ 44,143 $ 66,558 (a) Includes $2.6 billion of trust preferred securities at both September 30, 2015 , and December 31, 2014 . (b) Represents the fair value adjustment associated with the application of hedge accounting on certain of our long-term unsecured debt positions. Refer to Note 20 for additional information. (c) Includes advances from the Federal Home Loan Bank of Pittsburgh (FHLB) of $6.4 billion and $2.8 billion at September 30, 2015 , and December 31, 2014 , respectively. The following table presents the scheduled remaining maturity of long-term debt, assuming no early redemptions will occur. The actual payment of secured debt may vary based on the payment activity of the related pledged assets. Year ended December 31, ($ in millions) 2015 2016 2017 2018 2019 2020 and Fair value Total Unsecured Long-term debt $ 11 $ 1,934 $ 4,393 $ 2,951 $ 1,625 $ 9,741 $ 445 $ 21,100 Original issue discount (17 ) (74 ) (86 ) (97 ) (34 ) (1,092 ) — (1,400 ) Total unsecured (6 ) 1,860 4,307 2,854 1,591 8,649 445 19,700 Secured Long-term debt 3,731 10,150 14,403 8,913 5,521 5,043 — 47,761 Total long-term debt $ 3,725 $ 12,010 $ 18,710 $ 11,767 $ 7,112 $ 13,692 $ 445 $ 67,461 The following summarizes assets restricted as collateral for the payment of the related debt obligation primarily arising from securitization transactions accounted for as secured borrowings and repurchase agreements. September 30, 2015 December 31, 2014 ($ in millions) Total Ally Bank (a) Total Ally Bank (a) Investment securities (b) $ 1,591 $ — $ 786 $ 786 Mortgage assets held-for-investment and lending receivables 9,746 9,746 7,541 7,541 Consumer automotive finance receivables 34,186 9,491 33,438 11,263 Commercial automotive finance receivables 18,122 17,681 20,605 20,083 Investment in operating leases, net 6,810 3,947 6,820 4,672 Total assets restricted as collateral (c) (d) $ 70,455 $ 40,865 $ 69,190 $ 44,345 Secured debt (e) $ 49,681 $ 23,686 $ 47,867 $ 27,134 (a) Ally Bank is a component of the total column. (b) The investment securities are restricted under repurchase agreements. Refer to Note 13 for information on the repurchase agreements. (c) Ally Bank has an advance agreement with the FHLB, and had assets pledged to secure borrowings that were restricted as collateral to the FHLB totaling $13.0 billion and $10.7 billion at September 30, 2015 , and December 31, 2014 , respectively. These assets were composed primarily of consumer mortgage finance receivables and loans, net. Ally Bank has access to the Federal Reserve Bank Discount Window. Ally Bank had assets pledged and restricted as collateral to the Federal Reserve Bank totaling $3.0 billion and $3.2 billion at September 30, 2015 , and December 31, 2014 , respectively. These assets were composed of consumer automotive finance receivables and loans, net and investment in operating leases, net. Availability under these programs is only for the operations of Ally Bank and cannot be used to fund the operations or liabilities of Ally or its subsidiaries. (d) Excludes restricted cash and cash reserves for securitization trusts recorded within other assets on the Condensed Consolidated Balance Sheet . Refer to Note 11 for additional information. (e) Includes $1.9 billion and $3.7 billion of short-term borrowings at September 30, 2015 , and December 31, 2014 , respectively. Funding Facilities We utilize both committed credit facilities and other collateralized funding vehicles. The amounts outstanding under our various funding facilities are included on our Condensed Consolidated Balance Sheet . As of September 30, 2015 , Ally Bank had exclusive access to $3.25 billion of funding capacity from a committed credit facility. Funding programs supported by the Federal Reserve and the FHLB, together with repurchase agreements, complement Ally Bank’s private collateralized funding vehicles. The total capacity in our committed funding facilities is provided by banks and other financial institutions through private transactions. The committed secured funding facilities can be revolving in nature and allow for additional funding during the commitment period, or they can be amortizing and not allow for any further funding after the closing date. At September 30, 2015 , $21.2 billion of our $21.7 billion of committed capacity was revolving. Our revolving facilities generally have an original tenor ranging from 364 days to two years. As of September 30, 2015 , we had $17.4 billion of committed funding capacity from revolving facilities with a remaining tenor greater than 364 days. Committed Funding Facilities Outstanding Unused capacity (a) Total capacity ($ in millions) September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Bank funding Secured $ 3,015 $ 3,250 $ 235 $ 250 $ 3,250 $ 3,500 Parent funding Secured 17,154 15,030 1,256 3,425 18,410 18,455 Total committed facilities $ 20,169 $ 18,280 $ 1,491 $ 3,675 $ 21,660 $ 21,955 (a) F unding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	9 Months Ended
	Sep. 30, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	Accrued Expenses and Other Liabilities The components of accrued expenses and other liabilities were as follows. ($ in millions) September 30, 2015 December 31, 2014 Accounts payable $ 487 $ 298 Employee compensation and benefits 236 298 Reserves for insurance losses and loss adjustment expenses 182 208 Fair value of derivative contracts in payable position (a) 176 252 Deferred revenue 126 151 Other liabilities 544 528 Total accrued expenses and other liabilities $ 1,751 $ 1,735 (a) For additional information on derivative instruments and hedging activities, refer to Note 20 .

Preferred Stock

Preferred Stock	9 Months Ended
	Sep. 30, 2015
Preferred Stock, Including Additional Paid in Capital [Abstract]
Preferred Stock [Text Block]	Preferred Stock The following table summarizes information about our Series A and Series G preferred stock. September 30, 2015 December 31, 2014 Series A preferred stock (a) Carrying value ($ in millions) $ 696 $ 1,021 Par value (per share) 0.01 0.01 Liquidation preference (per share) 25 25 Number of shares authorized 40,870,560 40,870,560 Number of shares issued and outstanding 27,870,560 40,870,560 Dividend/coupon Prior to May 15, 2016 8.5 % 8.5 % On and after May 15, 2016 Three month Three month Series G preferred stock Carrying value ($ in millions) $ 117 $ 234 Par value (per share) 0.01 0.01 Liquidation preference (per share) 1,000 1,000 Number of shares authorized 2,576,601 2,576,601 Number of shares issued and outstanding 1,288,301 2,576,601 Dividend/coupon 7 % 7 % (a) Nonredeemable prior to May 15, 2016. Series A Preferred Stock On April 23, 2015, we announced a tender offer to purchase up to 13,000,000 shares of our outstanding Series A preferred stock for $26.65 per Series A share, which included an amount to cover accrued and unpaid dividends through the settlement date. The tender offer expired on May 20, 2015. On May 22, 2015, we repurchased 13,000,000 Series A Preferred Shares with an aggregate liquidation preference of $325 million for $347 million in cash. Upon repurchase of the tendered Series A Preferred shares on May 22, 2015, we derecognized the carrying value of $325 million and recognized the excess consideration paid of $22 million as an additional return to preferred shareholders. The remaining 27,870,560 Series A Preferred Shares following the repurchase were not impacted as a result of this transaction. Series G Preferred Stock On March 11, 2015, we issued a Notice of Partial Redemption to the holders of the outstanding Series G Preferred Stock to redeem, on a pro-rata basis, 1,288,300 shares at a redemption price of $1,000 per share plus $10.50 per share of accrued and unpaid dividends through the redemption date. On April 10, 2015, we redeemed 1,288,300 shares of our outstanding Series G Preferred Stock, with an aggregate liquidation preference of approximately $1,288 million for approximately $1,302 million in cash, which included $14 million in accrued and unpaid dividends. Upon redemption of the Series G Preferred shares, we derecognized the carrying value of $117 million and recognized the excess consideration paid of $1,171 million as an additional return to preferred shareholders. The remaining 1,288,301 Series G Preferred Shares following the redemption were not impacted as a result of this transaction.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Abstract]
Comprehensive Income (Loss) Note [Text Block]	Accumulated Other Comprehensive (Loss) Income The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income. ($ in millions) Unrealized losses on investment securities (a) Translation adjustments and net investment hedges (b) Cash flow hedges Defined benefit pension plans Accumulated other comprehensive loss Balance at December 31, 2013 $ (269 ) $ 65 $ 5 $ (77 ) $ (276 ) 2014 net change 148 (27 ) 1 4 126 Balance at September 30, 2014 $ (121 ) $ 38 $ 6 $ (73 ) $ (150 ) Balance at December 31, 2014 $ (21 ) $ 36 $ 7 $ (88 ) $ (66 ) 2015 net change (35 ) (21 ) — — (56 ) Balance at September 30, 2015 $ (56 ) $ 15 $ 7 $ (88 ) $ (122 ) (a) Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . The following tables present the before- and after-tax changes in each component of accumulated other comprehensive (loss) income. Three months ended September 30, 2015 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 106 $ (41 ) $ 65 Less: Net realized gains reclassified to income from continuing operations 6 (a) (3 ) (b) 3 Net change 100 (38 ) 62 Translation adjustments Net unrealized losses arising during the period (17 ) 5 (12 ) Less: Net realized losses reclassified to income from discontinued operations, net of tax (1 ) — (1 ) Net change (16 ) 5 (11 ) Net investment hedges Net unrealized gains arising during the period 15 (5 ) 10 Other comprehensive income $ 99 $ (38 ) $ 61 (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Three months ended September 30, 2014 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized losses arising during the period $ (15 ) $ 5 $ (10 ) Less: Net realized gains reclassified to income from continuing operations 45 (a) (1 ) (b) 44 Net change (60 ) 6 (54 ) Translation adjustments Net unrealized losses arising during the period (11 ) 4 (7 ) Net investment hedges Net unrealized gains arising during the period 8 (3 ) 5 Cash flow hedges Net unrealized gains arising during the period 1 — 1 Other comprehensive loss $ (62 ) $ 7 $ (55 ) (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Nine months ended September 30, 2015 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 53 $ (21 ) $ 32 Less: Net realized gains reclassified to income from continuing operations 106 (a) (39 ) (b) 67 Net change (53 ) 18 (35 ) Translation adjustments Net unrealized losses arising during the period (33 ) 11 (22 ) Less: Net realized gains reclassified to income from discontinued operations, net of tax 42 (20 ) 22 Net change (75 ) 31 (44 ) Net investment hedges Net unrealized gains arising during the period 31 (11 ) 20 Less: Net realized losses reclassified to income from discontinued operations, net of tax (4 ) 1 (3 ) Net change 35 (12 ) 23 Other comprehensive loss $ (93 ) $ 37 $ (56 ) (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Nine months ended September 30, 2014 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 358 $ (89 ) $ 269 Less: Net realized gains reclassified to income from continuing operations 129 (a) (8 ) (b) 121 Net change 229 (81 ) 148 Translation adjustments Net unrealized losses arising during the period (21 ) 8 (13 ) Less: Net realized gains reclassified to income from discontinued operations, net of tax 23 (3 ) 20 Net change (44 ) 11 (33 ) Net investment hedges Net unrealized gains arising during the period 10 (4 ) 6 Cash flow hedges Net unrealized gains arising during the period 1 — 1 Defined benefit pension plans Less: Net losses reclassified to income from continuing operations (7 ) (c) 3 (b) (4 ) Other comprehensive income $ 203 $ (77 ) $ 126 (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . (c) Includes losses reclassified to compensation and benefits expense in our Condensed Consolidated Statement of Comprehensive Income .

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings per Common Share The following table presents the calculation of basic and diluted earnings per common share. Three months ended September 30, Nine months ended September 30, ( $ in millions, except share data ) (a) 2015 2014 2015 2014 Net income from continuing operations $ 273 $ 293 $ 621 $ 774 Preferred stock dividends (b) (38 ) (67 ) (1,356 ) (200 ) Net income (loss) from continuing operations attributable to common shareholders 235 226 (735 ) 574 (Loss) income from discontinued operations, net of tax (5 ) 130 405 199 Net income (loss) attributable to common shareholders $ 230 $ 356 $ (330 ) $ 773 Basic weighted-average common shares outstanding (c) 483,073,329 481,611,138 482,725,342 480,916,395 Diluted weighted-average common shares outstanding (c) (d) 484,399,091 482,506,091 482,725,342 481,545,506 Basic earnings per common share Net income (loss) from continuing operations $ 0.49 $ 0.47 $ (1.52 ) $ 1.19 (Loss) income from discontinued operations, net of tax (0.01 ) 0.27 0.84 0.41 Net income (loss) $ 0.48 $ 0.74 $ (0.68 ) $ 1.60 Diluted earnings per common share Net income (loss) from continuing operations $ 0.49 $ 0.47 $ (1.52 ) $ 1.19 (Loss) income from discontinued operations, net of tax (0.01 ) 0.27 0.84 0.41 Net income (loss) $ 0.47 $ 0.74 $ (0.68 ) $ 1.60 (a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers. (b) Preferred stock dividends for the nine months ended September 30, 2015 , include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized. Refer to Note 16 for additional preferred stock information. (c) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months ended September 30, 2015 , and 2014 , respectively. (d) Due to antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months ended September 30, 2015 , basic weighted-average common shares outstanding were used to calculate basic and diluted earnings per share.

Regulatory Capital

Regulatory Capital	9 Months Ended
	Sep. 30, 2015
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements under Banking Regulations [Text Block]	Regulatory Capital and Other Regulatory Matters As a BHC, we and our wholly-owned state-chartered banking subsidiary, Ally Bank, are subject to capital requirements issued by U.S. banking regulators that require us to maintain risk-based and leverage capital ratios above minimum levels. A risk-based capital ratio is a ratio of a banking organization’s regulatory capital to its risk-weighted assets. A leverage capital ratio is a ratio of a banking organization’s regulatory capital to a measure of assets or exposures that is not risk-weighted. As of January 1, 2015, Ally and Ally Bank became subject to the rules implementing the 2010 Basel III capital framework in the United States (U.S. Basel III), which reflect new and higher capital requirements, capital buffers, and new regulatory capital definitions, deductions and adjustments. Certain aspects of U.S. Basel III, including the new capital buffers and regulatory capital deductions, will be phased in over several years. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary action by regulators that, if undertaken, could have a direct material effect on the Condensed Consolidated Financial Statements or the results of operations and financial condition of Ally and Ally Bank. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our capital, assets and certain off-balance sheet items. These measures and related classifications, which are used in the calculation of our risk-based and leverage capital ratios, are also subject to qualitative judgments by the regulators about the components of capital, the risk-weightings of our assets and other exposures, and other factors. The U.S. banking regulators also use these ratios and guidelines as part of the capital planning and stress testing processes. In addition, in order for Ally to maintain its status as a FHC, Ally and its bank subsidiary, Ally Bank, must remain “well-capitalized” and “well-managed,” as defined under applicable law. Effective January 1, 2015, the “well-capitalized” standard for insured depository institutions, such as Ally Bank, was revised to reflect the new and higher capital requirements under U.S. Basel III. Under U.S. Basel III, Ally must maintain a minimum Common Equity Tier 1 risk-based capital ratio of 4.5% , a minimum Tier 1 risk-based capital ratio of 6% , and a minimum Total risk-based capital ratio of 8% . In addition to these minimum requirements, Ally will also be subject to a Common Equity Tier 1 capital conservation buffer of more than 2.5% , subject to a phase-in period from January 1, 2016 through December 31, 2018. Failure to maintain the full amount of the buffer will result in restrictions on Ally’s ability to make capital distributions, including dividend payment and stock repurchases and redemptions, and to pay discretionary bonuses to executive officers. In addition to these new risk-based capital standards, U.S. Basel III subjects all U.S. banking organizations, including Ally, to a minimum Tier 1 leverage ratio of 4%, the denominator of which takes into account only on-balance sheet assets. In addition to introducing new capital ratios, U.S. Basel III revises the eligibility criteria for regulatory capital instruments and provides for the phase-out of existing capital instruments that do not satisfy the new criteria. Subject to certain exceptions (e.g., for certain debt or equity issued to the U.S. government under the Emergency Economic Stabilization Act), trust preferred and other “hybrid” securities will be phased out from a banking organization’s Tier 1 capital by January 1, 2016. Also, subject to a phase-in schedule, certain new items will be deducted from Common Equity Tier 1 capital, and certain other deductions from regulatory capital will be modified. Among other things, U.S. Basel III requires significant investments in the common shares of unconsolidated financial institutions, mortgage servicing rights, and certain deferred tax assets that exceed specified individual and aggregate thresholds to be deducted from Common Equity Tier 1 capital. U.S. Basel III also revises the standardized approach for calculating risk-weighted assets by, among other things, modifying certain risk weights and introducing new methods for calculating risk-weighted assets for certain types of assets and exposures. Ally is subject to the U.S. Basel III standardized approach for counterparty credit risk. It is not subject to the U.S. Basel III advanced approaches for counterparty credit risk. Ally is currently not subject to the U.S. market risk capital rule, which applies only to banking organizations with significant trading assets and liabilities. During 2010, Ally, IB Finance Holding Company, LLC (IB Finance), Ally Bank, and the Federal Deposit Insurance Corporation (FDIC) entered into a Capital and Liquidity Maintenance Agreement (CLMA). The CLMA was restated on July 13, 2015. The CLMA requires capital at Ally Bank to be maintained at a level such that Ally Bank's leverage ratio is at least 15% . For this purpose, the leverage ratio is determined in accordance with the FDIC's regulations related to capital maintenance. The following table summarizes our capital ratios under the U.S. Basel III capital framework. Under Basel III Under Basel I September 30, 2015 (a) December 31, 2014 (b) Required Well-capitalized ( $ in millions ) Amount Ratio Amount Ratio Risk-based capital Common Equity Tier 1 (to risk-weighted assets) (c) Ally Financial Inc. $ 13,444 10.05 % $ 12,588 9.64 % 4.50 % (d) Ally Bank 16,311 17.50 16,022 16.89 4.50 6.50 % Tier 1 (to risk-weighted assets) Ally Financial Inc. $ 16,087 12.02 % $ 16,389 12.55 % 6.00 % 6.00 % Ally Bank 16,311 17.50 16,022 16.89 6.00 8.00 Total (to risk-weighted assets) Ally Financial Inc. $ 17,327 12.95 % $ 17,294 13.24 % 8.00 % 10.00 % Ally Bank 16,739 17.96 16,468 17.36 8.00 10.00 Tier 1 leverage (to adjusted quarterly average assets) (e) Ally Financial Inc. $ 16,087 10.43 % $ 16,389 10.94 % 4.00 % (d) Ally Bank 16,311 15.35 16,022 15.44 15.00 (f) 5.00 % (a) U.S. Basel III became effective for us on January 1, 2015, subject to transitional provisions primarily related to deductions and adjustments impacting Common Equity Tier 1 capital and Tier 1 capital. (b) Capital ratios as of December 31, 2014 are presented under the U.S. Basel I capital framework. (c) Previously referred to as Tier 1 Common Equity under the U.S. Basel I capital framework. (d) Currently, there is no ratio component for determining whether a BHC is "well-capitalized." (e) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology. (f) Ally Bank, in accordance with the CLMA, is required to maintain a Tier 1 leverage ratio of at least 15% . At September 30, 2015 , Ally and Ally Bank were “well-capitalized” and met all capital requirements to which each was subject. Capital Planning and Stress Tests As a BHC with $50 billion or more of consolidated assets, Ally is required to conduct periodic company-run stress tests, is subject to an annual supervisory stress test conducted by the Board of Governors of the Federal Reserve System (FRB), and must submit an annual capital plan to the FRB. In addition, as an insured state nonmember bank with $50 billion or more in total consolidated assets, Ally Bank is required to conduct annual company-run stress tests. Ally’s capital plan must include a description of all planned capital actions over a nine-quarter planning horizon. The capital plan must also include a discussion of how Ally will maintain capital above the minimum regulatory capital ratios and above a Tier 1 common equity-to-total risk-weighted assets ratio of 5% under baseline, adverse, and severely adverse economic scenarios, and serve as a source of strength to Ally Bank. The FRB must approve Ally's capital plan before Ally may take any capital action. Even with an approved capital plan, Ally must seek the approval of the FRB before making a capital distribution if, among other factors, Ally would not meet its regulatory capital requirements after making the proposed capital distribution. On January 5, 2015, Ally submitted the results of its semi-annual stress test and its proposed capital actions to the FRB, and Ally Bank submitted the results of its annual company-run stress test to the FDIC. On March 6, 2015, Ally and Ally Bank publicly disclosed summary results of the stress test under the most severe scenario in accordance with regulatory requirements. On March 11, 2015 , Ally received a non-objection to its capital plan from the FRB, including the proposed capital actions contained in our submission. As a result, we redeemed $1.3 billion in Series G preferred securities in April 2015, and repurchased $325 million in Series A preferred securities in May 2015, pursuant to a tender offer. In addition, on July 6, 2015, Ally submitted to the FRB the results of our company-run mid-year stress test conducted under multiple macroeconomic scenarios. We disclosed the results of this stress test under the most severe scenario on July 15, 2015, in accordance with regulatory requirements.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Instruments and Hedging Activities We enter into interest rate, foreign-currency, and equity swaps, futures, forwards, options, and swaptions in connection with our market risk management activities. Derivative instruments are used to manage interest rate risk relating to specific groups of assets and liabilities, including automotive loan assets and debt. We use foreign exchange contracts to mitigate foreign-currency risk associated with foreign-currency-denominated debt, foreign exchange transactions, and our net investment in foreign subsidiaries. In addition, we also enter into equity option contracts to manage our exposure to the equity markets. Our primary objective for utilizing derivative financial instruments is to manage interest rate risk associated with our fixed- and variable-rate assets and liabilities, foreign exchange risks related to our foreign-currency denominated assets and liabilities, and market risks related to our investment portfolio and certain of our executive share-based compensation plans. Interest Rate Risk We monitor our mix of fixed- and variable-rate assets and liabilities. When it is cost-effective to do so, we may enter into interest rate swaps, forwards, futures, options, and swaptions to achieve our desired mix of fixed- and variable-rate assets and liabilities. We execute interest rate swaps, forwards, futures, options, and swaptions to modify our exposure to interest rate risk by converting certain fixed-rate instruments to a variable-rate and certain variable-rate instruments to a fixed-rate. We use a mix of both derivatives that qualify for hedge accounting treatment and economic hedges. Derivatives qualifying for hedge accounting consist of receive-fixed swaps designated as fair value hedges of specific fixed-rate debt obligations, pay-fixed swaps designated as fair value hedges of specific portfolios of fixed-rate held-for-investment retail automotive loan assets, and pay-fixed swaps designated as cash flow hedges of the expected future cash flows in the form of interest payments on certain outstanding variable-rate borrowings associated with our secured debt. We also execute economic hedges, which consist of interest rate swaps and interest rate caps held to mitigate interest rate risk associated with our debt portfolio. We also use interest rate swaps to economically hedge our net fixed-versus-variable interest rate exposure. We enter into economic hedges in the form of short-dated, exchange-traded Eurodollar futures to hedge the interest rate exposure of our fixed-rate automotive loans, as well as forwards, options, and swaptions to economically hedge our net fixed-versus-variable interest rate exposure. Foreign Exchange Risk We enter into derivative financial instrument contracts to mitigate the risk associated with variability in cash flows related to our various foreign-currency exposures. We enter into foreign-currency forwards with external counterparties as net investment hedges of foreign exchange exposure on our investments in foreign subsidiaries. Our equity is impacted by the cumulative translation adjustments resulting from the translation of foreign subsidiary results; this impact is reflected in our accumulated other comprehensive (loss) income. Our remaining foreign subsidiaries in wind-down maintain both assets and liabilities in local currencies. These local currencies are generally the subsidiaries' functional currencies for accounting purposes. Foreign-currency exchange-rate gains and losses arise when the assets or liabilities of our subsidiaries are denominated in currencies that differ from its functional currency. We utilized a cross-currency swap to economically hedge foreign exchange exposure on foreign-currency-denominated debt by converting the funding currency to our functional currency. This swap was entered into concurrent with the debt issuance with the terms of the derivative matching the terms of the underlying debt. This swap matured during the second quarter of 2015. We also enter into foreign currency forwards to economically hedge our foreign denominated debt, our centralized lending program, and foreign-denominated third party loans. The hedge of foreign denominated debt was entered into concurrent with the debt issuance with the terms of the derivative matching the terms of the underlying debt. The centralized lending program manages liquidity for our subsidiary businesses, but as of September 30, 2015 , this activity is immaterial. Foreign-currency-denominated loan agreements are executed with our foreign subsidiaries in their local currencies. We evaluate our foreign-currency exposure resulting from intercompany lending and manage our currency risk exposure by entering into foreign-currency derivatives with external counterparties. Our remaining foreign-currency derivatives, such as hedges of foreign-denominated third party loans, are recorded at fair value with changes recorded as income offsetting the gains and losses on the associated foreign-currency transactions. Market Risk We enter into equity options to economically hedge our exposure to the equity markets. We purchase options to assume a long position on certain equities and write options to assume a short position. We have also entered into prepaid equity forward contracts to economically hedge the price risk associated with certain of our executive share-based compensation plans. The prepaid equity forward contracts are hybrid instruments containing an embedded forward contract, which is considered a derivative instrument. The embedded derivative instrument is bifurcated from the host contract and is recorded at fair value with changes in fair value recorded in compensation and benefits expense. The balance of the prepaid component of these equity forward contracts was $47 million as of September 30, 2015 , and was recorded within other assets on the Condensed Consolidated Balance Sheet . Counterparty Credit Risk Derivative financial instruments contain an element of credit risk if counterparties are unable to meet the terms of the agreements. Credit risk associated with derivative financial instruments is measured as the net replacement cost should the counterparties that owe us under the contract completely fail to perform under the terms of those contracts, assuming no recoveries of underlying collateral as measured by the market value of the derivative financial instrument. To mitigate the risk of counterparty default, we maintain collateral agreements with certain counterparties. The agreements require both parties to maintain collateral in the event the fair values of the derivative financial instruments meet established thresholds. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls. Certain derivative instruments contain provisions that require us to either post additional collateral or immediately settle any outstanding liability balances upon the occurrence of a specified credit risk-related event. No such specified credit risk related events occurred during the third quarter of 2015. We placed cash collateral totaling $72 million and securities collateral totaling $111 million at September 30, 2015 , and $221 million and $15 million at December 31, 2014 , respectively, in accounts maintained by counterparties. This amount primarily relates to collateral posted to support our derivative positions. This amount also excludes cash and securities pledged as collateral under repurchase agreements. Refer to Note 13 for details on the repurchase agreements. The receivables for cash collateral placed are included in our Condensed Consolidated Balance Sheet in other assets. We received cash collateral from counterparties totaling $129 million at September 30, 2015 to support these derivative positions. We received cash collateral from counterparties totaling $71 million at December 31, 2014 . The payables for cash collateral received are included on our Condensed Consolidated Balance Sheet in accrued expenses and other liabilities. In certain circumstances, we receive or post securities as collateral with counterparties. We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met. At September 30, 2015 , and December 31, 2014 , we received noncash collateral of $ 8 million and $15 million , respectively. Included in these amounts is noncash collateral where we have been granted the right to sell or pledge the underlying assets. We have not sold or pledged any of the noncash collateral received under these agreements. Balance Sheet Presentation The following table summarizes the fair value amounts of derivative instruments reported on our Condensed Consolidated Balance Sheet . The fair value amounts are presented on a gross basis, are segregated by derivatives that are designated and qualifying as hedging instruments or those that are not, and are further segregated by type of contract within those two categories. Notional amounts are reference amounts from which contractual obligations are derived and are not recorded on the balance sheet. In our view, derivative notional is not an accurate measure of our derivative exposure when viewed in isolation from other factors, such as market rate fluctuations and counterparty credit risk. September 30, 2015 December 31, 2014 Derivative contracts in a Notional Derivative contracts in a Notional ( $ in millions ) receivable payable receivable position (a) payable Derivatives qualifying for hedge accounting Interest rate contracts Swaps (c) (d) $ 182 $ 33 $ 17,204 $ 118 $ 7 $ 18,554 Foreign exchange contracts Forwards 2 — 233 — — 210 Total derivatives qualifying for hedge accounting 184 33 17,437 118 7 18,764 Economic hedges Interest rate contracts Swaps 50 71 6,353 40 65 11,979 Futures and forwards 5 4 7,850 4 2 18,886 Written options — 56 18,007 — 94 14,823 Purchased options 55 — 18,086 94 — 15,159 Total interest rate risk 110 131 50,296 138 161 60,847 Foreign exchange contracts Swaps — — — — 74 1,210 Futures and forwards 1 1 161 5 4 304 Total foreign exchange risk 1 1 161 5 78 1,514 Equity contracts Forwards — 8 47 — 3 74 Written options — 3 1 — 3 1 Purchased options 4 — — 2 — — Total equity risk 4 11 48 2 6 75 Total economic hedges 115 143 50,505 145 245 62,436 Total derivatives $ 299 $ 176 $ 67,942 $ 263 $ 252 $ 81,200 (a) Derivative contracts in a receivable position are classified as other assets on the Condensed Consolidated Balance Sheet , and includes accrued interest of $34 million and $50 million at September 30, 2015 , and December 31, 2014 , respectively. (b) Derivative contracts in a liability position are classified as accrued expenses and other liabilities on the Condensed Consolidated Balance Sheet , and includes accrued interest of $9 million and $17 million at September 30, 2015 , and December 31, 2014 , respectively. (c) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate debt obligations with $182 million and $97 million in a receivable position, $0 million and $1 million in a payable position, and a $5.7 billion and $4.7 billion notional amount at September 30, 2015 , and December 31, 2014 , respectively. Of the hedge notional amount at September 30, 2015 , $2.2 billion is associated with debt maturing in five or more years. (d) Other fair value hedges include pay-fixed swaps on portfolios of held-for-investment automotive loan assets with $0 million and $21 million in a receivable position, $33 million and $6 million in a payable position, and an $11.5 billion and $13.9 billion notional amount at September 30, 2015 , and December 31, 2014 , respectively. Statement of Comprehensive Income Presentation The following table summarizes the location and amounts of gains and losses on derivative instruments reported in our Condensed Consolidated Statement of Comprehensive Income . Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Derivatives qualifying for hedge accounting (Loss) gain recognized in earnings on derivatives Interest rate contracts Interest and fees on finance receivables and loans (a) $ (34 ) $ 28 $ (50 ) $ 22 Interest on long-term debt (b) 132 (39 ) 121 102 Gain (loss) recognized in earnings on hedged items Interest rate contracts Interest and fees on finance receivables and loans (c) 38 (15 ) 73 14 Interest on long-term debt (d) (135 ) 49 (128 ) (90 ) Total derivatives qualifying for hedge accounting 1 23 16 48 Economic derivatives (Loss) gain recognized in earnings on derivatives Interest rate contracts Loss on mortgage and automotive loans, net (2 ) — (2 ) — Other income, net of losses — (5 ) (9 ) (24 ) Total interest rate contracts (2 ) (5 ) (11 ) (24 ) Foreign exchange contracts (e) Interest on long-term debt (1 ) (108 ) (139 ) (117 ) Other income, net of losses 1 8 9 8 Total foreign exchange contracts — (100 ) (130 ) (109 ) Equity contracts Compensation and benefits expense (4 ) (6 ) (7 ) (6 ) Total equity contracts (4 ) (6 ) (7 ) (6 ) Loss recognized in earnings on derivatives $ (5 ) $ (88 ) $ (132 ) $ (91 ) (a) Amounts exclude losses related to interest for qualifying accounting hedges of retail automotive loans held-for-investment, which are primarily offset by the fixed coupon payments of the loans. The losses were $18 million and $16 million for the three months ended September 30, 2015 , and 2014 , respectively, and $50 million and $43 million for the nine months ended September 30, 2015 , and 2014 , respectively. (b) Amounts exclude gains related to interest for qualifying accounting hedges of debt, which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $24 million and $27 million for the three months ended September 30, 2015 , and 2014 , respectively, and $71 million and $89 million for the nine months ended September 30, 2015 , and 2014 , respectively. (c) Amounts exclude losses related to amortization of deferred loan basis adjustments on the de-designated hedged item of $1 million for the three months ended September 30, 2015, and $1 million for the nine months ended September 30, 2015. (d) Amounts exclude gains related to amortization of deferred basis adjustments on the de-designated hedged item of $14 million and $38 million for the three months ended September 30, 2015 , and 2014 , respectively, and $59 million and $120 million for the nine months ended September 30, 2015 , and 2014 , respectively. (e) Amounts exclude gains related to the revaluation of the related foreign-denominated debt or receivable of $1 million and $102 million for the three months ended September 30, 2015 , and 2014 , respectively, and $134 million and $112 million for the nine months ended September 30, 2015 , and 2014 , respectively. The following table summarizes derivative instruments used in cash flow and net investment hedge accounting relationships. Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Cash flow hedges Interest rate contracts Loss reclassified from accumulated other comprehensive income to interest on long-term debt $ — $ (1 ) $ — $ (1 ) Total interest on long-term debt $ — $ (1 ) $ — $ (1 ) Gain recognized in other comprehensive income $ — $ 1 $ — $ 1 Net investment hedges Foreign exchange contracts Loss reclassified from accumulated other comprehensive loss to income from discontinued operations, net $ — $ — $ (4 ) $ — Total loss from discontinued operations, net $ — $ — $ (4 ) $ — Gain recognized in other comprehensive income (a) $ 15 $ 8 $ 35 $ 10 (a) The amounts represent the effective portion of net investment hedges. There are offsetting amounts recognized in accumulated other comprehensive income related to the revaluation of the related net investment in foreign operations, including the tax impacts of the hedge and related net investment, as disclosed separately in Note 17 . There were losses of $16 million and losses of $10 million for the three months ended September 30, 2015 , and 2014 , respectively. There were losses of $56 million and $37 million for the nine months ended September 30, 2015 , and 2014 , respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes We recognized total income tax expense from continuing operations of $144 million and $341 million for the three months and nine months ended September 30, 2015 , compared to income tax expense of $127 million and $285 million for the same periods in 2014 . The increase in income tax expense for the three months ended September 30, 2015 , compared to the same period in 2014 , was primarily driven by decreases in capital gains resulting in less tax benefit on the release of the valuation allowance against capital loss carryforwards and a reduction in tax credits. The increase in income tax expense for the nine months ended September 30, 2015, compared to the same period in 2014, was primarily driven by a non-recurring tax benefit in the second quarter of 2014 related to the reduction in the liability for unrecognized tax benefits as a result of the completion of the U.S. federal audit related to our 2009 through 2011 tax years. As of each reporting date, we consider existing evidence, both positive and negative, that could impact our view with regard to future realization of deferred tax assets. We continue to believe it is more likely than not that the benefit for certain foreign tax credits and state net operating loss carryforwards will not be realized. In recognition of this risk, we continue to provide a partial valuation allowance on the deferred tax assets relating to these carryforwards. It is reasonably possible the unrecognized tax benefits disclosed in our 2014 Annual Report will decrease by up to $180 million over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction as anticipated.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Fair Value Measurements For purposes of this disclosure, fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability (exit price) in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. Fair value is based on the assumptions market participants would use when pricing an asset or liability. Additionally, entities are required to consider all aspects of nonperformance risk, including the entity’s own credit standing, when measuring the fair value of a liability. GAAP specifies a three-level hierarchy that is used when measuring and disclosing fair value. The fair value hierarchy gives the highest priority to quoted prices available in active markets (i.e., observable inputs) and the lowest priority to data lacking transparency (i.e., unobservable inputs). An instrument’s categorization within the fair value hierarchy is based on the lowest level of significant input to its valuation. The following is a description of the three hierarchy levels. Level 1 Inputs are quoted prices in active markets for identical assets or liabilities at the measurement date. Additionally, the entity must have the ability to access the active market, and the quoted prices cannot be adjusted by the entity. Level 2 Inputs are other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices in active markets for similar assets or liabilities; quoted prices in inactive markets for identical or similar assets or liabilities; or inputs that are observable or can be corroborated by observable market data by correlation or other means for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs are supported by little or no market activity. The unobservable inputs represent management's best assumptions of how market participants would price the assets or liabilities. Generally, Level 3 assets and liabilities are valued using pricing models, discounted cash flow methodologies, or similar techniques that require significant judgment or estimation. Transfers Transfers into or out of any hierarchy level are recognized at the end of the reporting period in which the transfer occurred. There were no transfers between any levels during the nine months ended September 30, 2015 . Following are descriptions of the valuation methodologies used to measure material assets and liabilities at fair value and details of the valuation models, key inputs to those models, and significant assumptions utilized. • Available-for-sale securities — All classes of available-for-sale securities are carried at fair value based on observable market prices, when available. If observable market prices are not available, our valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate and consider recent market transactions, experience with similar securities, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we are required to utilize various significant assumptions including market observable inputs (e.g., forward interest rates) and internally developed inputs (including prepayment speeds, delinquency levels, and credit losses). • Mortgage loans held-for-sale, net — Certain of our mortgage loans held-for-sale are accounted for at fair value because of fair value option elections. Mortgage loans held-for-sale are typically pooled together and sold into certain exit markets depending on underlying attributes of the loan, such as eligibility with the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae) (collectively, the Government-sponsored Enterprises, or GSEs), product type, interest rate, and credit quality. Mortgage loans previously classified as Level 2 were mainly GSE-eligible mortgage loans carried at fair value due to fair value option election, which were valued predominantly using published forward agency prices. It also included any domestic loans where recently negotiated market prices for the loan pool exist with a counterparty (which approximates fair value) or quoted market prices for similar loans are available. These mortgage loans were transferred into Level 3 as of December 31, 2014, based on decreased observability of significant inputs resulting from no longer being an active seller of mortgage loans to GSEs. As a result, at December 31, 2014, they were valued based on a discounted cash flow basis utilizing cash flow projections from internally developed models that utilized prepayment, default, and discount rate assumptions. Refer to the section within this note titled Fair Value Option for Financial Assets for further information about the fair value elections. • Interests retained in financial asset sales — The interests retained are in securitization trusts and deferred purchase prices on the sale of whole-loans. Due to inactivity in the market, valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate; therefore, we classified these assets as Level 3. The valuation considers recent market transactions, experience with similar assets, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we utilize various significant assumptions, including market observable inputs (e.g., forward interest rates) and internally developed inputs (e.g., prepayment speeds, delinquency levels, and credit losses). • Derivative instruments — We enter into a variety of derivative financial instruments as part of our risk management strategies. Certain of these derivatives are exchange traded, such as Eurodollar futures, options of Eurodollar futures, and equity options. To determine the fair value of these instruments, we utilize the quoted market prices for the particular derivative contracts; therefore, we classified these contracts as Level 1. We also execute over-the-counter (OTC) and centrally-cleared derivative contracts, such as interest rate swaps, a cross-currency swap, swaptions, foreign-currency denominated forward contracts, prepaid equity forward contracts, caps, floors, and agency to-be-announced securities. For OTC contracts, we utilize third-party-developed valuation models that are widely accepted in the market to value these OTC derivative contracts. The specific terms of the contract and market observable inputs (such as interest rate forward curves, interpolated volatility assumptions, or equity pricing) are used in the model. We classified these OTC derivative contracts as Level 2 because all significant inputs into these models were market observable. For centrally-cleared contracts, we utilize unadjusted prices obtained from the clearing house as the basis for valuation, and they are also classified as Level 2. Historically, we had a cross-currency swap and interest rate caps accounted for as derivative instruments that were classified as Level 3. However, at September 30, 2015 , and December 31, 2014 , we did not have any positions classified as Level 3. We are required to consider all aspects of nonperformance risk, including our own credit standing, when measuring fair value of a liability. We reduce credit risk on the majority of our derivatives by entering into legally enforceable agreements that enable the posting and receiving of collateral associated with the fair value of our derivative positions on an ongoing basis. In the event that we do not enter into legally enforceable agreements that enable the posting and receiving of collateral, we will consider our credit risk and the credit risk of our counterparties in the valuation of derivative instruments through a credit valuation adjustment (CVA), if warranted. The CVA calculation utilizes the credit default swap spreads of the counterparty. Recurring Fair Value The following tables display the assets and liabilities measured at fair value on a recurring basis including financial instruments elected for the fair value option. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The tables below display the hedges separately from the hedged items; therefore, they do not directly display the impact of our risk management activities. Recurring fair value measurements September 30, 2015 ($ in millions) Level 1 Level 2 Level 3 Total Assets Investment securities Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 1,114 $ 695 $ — $ 1,809 U.S. State and political subdivisions — 651 — 651 Foreign government 10 174 — 184 Mortgage-backed residential — 11,614 — 11,614 Mortgage-backed commercial — 517 — 517 Asset-backed — 1,951 — 1,951 Corporate debt securities — 1,047 — 1,047 Total debt securities 1,124 16,649 — 17,773 Equity securities (a) 985 — — 985 Total available-for-sale securities 2,109 16,649 — 18,758 Other assets Interests retained in financial asset sales — — 29 29 Derivative contracts in a receivable position (b) Interest rate 5 287 — 292 Foreign currency — 3 — 3 Other 4 — — 4 Total derivative contracts in a receivable position 9 290 — 299 Total assets $ 2,118 $ 16,939 $ 29 $ 19,086 Liabilities Accrued expenses and other liabilities Derivative contracts in a payable position (b) Interest rate $ (4 ) $ (160 ) $ — $ (164 ) Foreign currency — (1 ) — (1 ) Other (3 ) (8 ) — (11 ) Total derivative contracts in a payable position (7 ) (169 ) — (176 ) Total liabilities $ (7 ) $ (169 ) $ — $ (176 ) (a) Our investment in any one industry did not exceed 13% . (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . Recurring fair value measurements December 31, 2014 ($ in millions) Level 1 Level 2 Level 3 Total Assets Investment securities Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 217 $ 961 $ — $ 1,178 U.S. State and political subdivisions — 406 — 406 Foreign government 14 218 — 232 Mortgage-backed residential — 10,425 — 10,425 Mortgage-backed commercial — 253 — 253 Asset-backed — 1,991 — 1,991 Corporate debt securities — 746 — 746 Total debt securities 231 15,000 — 15,231 Equity securities (a) 906 — — 906 Total available-for-sale securities 1,137 15,000 — 16,137 Mortgage loans held-for-sale, net (b) — — 3 3 Other assets Interests retained in financial asset sales — — 47 47 Derivative contracts in a receivable position (c) Interest rate 4 252 — 256 Foreign currency — 5 — 5 Other 2 — — 2 Total derivative contracts in a receivable position 6 257 — 263 Collateral placed with counterparties (d) — 15 — 15 Total assets $ 1,143 $ 15,272 $ 50 $ 16,465 Liabilities Accrued expenses and other liabilities Derivative contracts in a payable position (c) Interest rate $ (2 ) $ (166 ) $ — $ (168 ) Foreign currency — (78 ) — (78 ) Other (2 ) (4 ) — (6 ) Total derivative contracts in a payable position (4 ) (248 ) — (252 ) Total liabilities $ (4 ) $ (248 ) $ — $ (252 ) (a) Our investment in any one industry did not exceed 16% . (b) Carried at fair value due to fair value option elections. (c) For additional information on derivative instruments and hedging activities, refer to Note 20 . (d) Represents collateral in the form of investment securities. Cash collateral was excluded. The following tables present the reconciliation for all Level 3 assets and liabilities measured at fair value on a recurring basis. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The Level 3 items presented below may be hedged by derivatives and other financial instruments that are classified as Level 1 or Level 2. Thus, the following tables do not fully reflect the impact of our risk management activities. Level 3 recurring fair value measurements Net realized/unrealized gains Fair value at September 30, 2015 Net unrealized gains included in earnings ($ in millions) Fair value at July 1, 2015 included in earnings included in OCI Purchases Sales Issuances Settlements Transfers out of Level 3 Assets Mortgage loans held-for-sale, net $ 4 $ — $ — $ — $ (4 ) $ — $ — $ — $ — $ — Other assets Interests retained in financial asset sales 32 1 (a) — — — 1 (5 ) — 29 — Total assets $ 36 $ 1 $ — $ — $ (4 ) $ 1 $ (5 ) $ — $ 29 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair value at July 1, 2014 Net realized/unrealized gains Purchases Sales Issuances Settlements Transfers out of Level 3 Fair value at September 30, 2014 Net unrealized gains included in earnings ($ in millions) included in earnings included in OCI Assets Other assets Interests retained in financial asset sales $ 74 $ 4 (a) $ — $ — $ — $ — $ (17 ) $ — $ 61 $ — Total assets $ 74 $ 4 $ — $ — $ — $ — $ (17 ) $ — $ 61 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair Value at Jan. 1, 2015 Net realized/unrealized Purchases Sales Issuances Settlements Transfers out of Level 3 Fair value at September 30, 2015 Net unrealized gains included in earnings still held at September 30, 2015 ($ in millions) included in earnings included in OCI Assets Mortgage loans held-for-sale, net $ 3 $ 1 $ — $ — $ (4 ) $ — $ — $ — $ — $ — Other assets Interests retained in financial asset sales 47 8 (a) — — — 2 (28 ) — 29 — Total assets $ 50 $ 9 $ — $ — $ (4 ) $ 2 $ (28 ) $ — $ 29 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair Value at Jan. 1, 2014 Net realized/unrealized Purchases Sales Issuances Settlements Transfers out of level 3 Fair value at September 30, 2014 Net unrealized gains included in earnings still held at September 30, 2014 ($ in millions) included in earnings included in OCI Assets Other assets Interests retained in financial asset sales $ 100 $ 9 (a) $ — $ — $ — $ — $ (48 ) $ — $ 61 $ — Derivative contracts, net (1 ) — — — — — (2 ) 3 — — Total assets $ 99 $ 9 $ — $ — $ — $ — $ (50 ) $ 3 $ 61 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Nonrecurring Fair Value We may be required to measure certain assets and liabilities at fair value from time to time. These periodic fair value measures typically result from the application of lower-of-cost or fair value accounting or certain impairment measures. These items would constitute nonrecurring fair value measures. The following tables display the assets and liabilities measured at fair value on a nonrecurring basis. Nonrecurring fair value measurements Lower-of-cost or fair value or valuation reserve allowance Total gain included in earnings for the three months ended Total gain included in earnings for the nine months ended September 30, 2015 ($ in millions) Level 1 Level 2 Level 3 Total Assets Loans held-for-sale, net Other $ — $ — $ 37 $ 37 $ — n/m (a) n/m (a) Total loans held-for-sale, net — — 37 37 — n/m (a) n/m (a) Commercial finance receivables and loans, net (b) Automotive — — 13 13 (4 ) n/m (a) n/m (a) Other — — 30 30 (15 ) n/m (a) n/m (a) Total commercial finance receivables and loans, net — — 43 43 (19 ) n/m (a) n/m (a) Other assets Repossessed and foreclosed assets (c) — — 9 9 (3 ) n/m (a) n/m (a) Other — — 2 2 — n/m (a) n/m (a) Total assets $ — $ — $ 91 $ 91 $ (22 ) n/m n/m n/m = not meaningful (a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance. (b) Represents the portion of the portfolio specifically impaired during 2015 . The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables. (c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value. Nonrecurring fair value measurements Lower-of-cost or fair value or valuation reserve allowance Total gain included in earnings for the three months ended Total gain included in earnings for the nine months ended September 30, 2014 ($ in millions) Level 1 Level 2 Level 3 Total Assets Commercial finance receivables and loans, net (a) Automotive $ — $ — $ 16 $ 16 $ (1 ) n/m (b) n/m (b) Other — — 37 37 (14 ) n/m (b) n/m (b) Total commercial finance receivables and loans, net — — 53 53 (15 ) n/m (b) n/m (b) Other assets Repossessed and foreclosed assets (c) — — 8 8 (3 ) n/m (b) n/m (b) Other — — 2 2 — $ — $ — Total assets $ — $ — $ 63 $ 63 $ (18 ) n/m n/m n/m = not meaningful (a) Represents the portion of the portfolio specifically impaired during 2014 . The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables. (b) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance. (c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value. Fair Value Option for Financial Assets We elected the fair value option for an insignificant amount of conforming and government-insured mortgage loans held-for-investment. We elected the fair value option to mitigate earnings volatility by better matching the accounting for the assets with the related hedges. Our intent in electing fair value measurement was to mitigate a divergence between accounting losses and economic exposure for certain assets and liabilities. Fair Value of Financial Instruments The following table presents the carrying and estimated fair value of financial instruments, except for those recorded at fair value on a recurring basis presented in the previous section of this note titled Recurring Fair Value. When possible, we use quoted market prices to determine fair value. Where quoted market prices are not available, the fair value is internally derived based on appropriate valuation methodologies with respect to the amount and timing of future cash flows and estimated discount rates. However, considerable judgment is required in interpreting market data to develop estimates of fair value, so the estimates are not necessarily indicative of the amounts that could be realized or would be paid in a current market exchange. The effect of using different market assumptions or estimation methodologies could be material to the estimated fair values. Fair value information presented herein was based on information available at September 30, 2015 , and December 31, 2014 . Estimated fair value ($ in millions) Carrying value Level 1 Level 2 Level 3 Total September 30, 2015 Financial assets Loans held-for-sale, net $ 37 $ — $ — $ 37 $ 37 Finance receivables and loans, net 106,973 — — 107,846 107,846 Nonmarketable equity investments 313 — 287 43 330 Financial liabilities Deposit liabilities $ 64,041 $ — $ — $ 64,728 $ 64,728 Short-term borrowings 5,378 — — 5,378 5,378 Long-term debt 67,461 — 21,384 47,762 69,146 December 31, 2014 Financial assets Loans held-for-sale, net $ 2,003 $ — $ 485 $ 1,554 $ 2,039 Finance receivables and loans, net 98,971 — — 99,430 99,430 Nonmarketable equity investments 271 — 246 33 279 Financial liabilities Deposit liabilities $ 58,222 $ — $ — $ 58,777 $ 58,777 Short-term borrowings 7,062 — — 7,063 7,063 Long-term debt 66,558 — 25,224 44,084 69,308 The following describes the methodologies and assumptions used to determine fair value for the significant classes of financial instruments. In addition to the valuation methods discussed below, we also followed guidelines for determining whether a market was not active and a transaction was not distressed. As such, we assumed the price that would be received in an orderly transaction (including a market-based return) and not in forced liquidation or distressed sale. • Cash and cash equivalents — Included in cash and cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and which are subject to an insignificant risk of change in value due to interest rate, quoted price, or penalty on withdrawal. Classified as Level 1 under the fair value hierarchy, cash and cash equivalents generally expose us to limited credit risk and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates. As such, the carrying value approximates the fair value of these instruments. • Loans held-for-sale, net — Loans held-for-sale classified as Level 3 include all loans valued using internally developed valuation models because observable market prices were not available. We based our valuation of automotive loans held-for-sale on internally developed discounted cash flow models (an income approach). These valuation models estimate the exit price we expect to receive in the loan’s principal market, which, depending on characteristics of the loans, may be the whole-loan market or the securitization market. Although we utilize and give priority to market observable inputs, such as interest rates and market spreads within these models, we are typically required to utilize internal inputs, such as prepayment speeds (absolute prepayment model, or ABS), gross loss range by loan segment (percentage of receivable balance lost in the event of default), and credit spreads (the risk premium component added to observed benchmark rate to determine the discount rate used in the discounted cash flow model). While numerous controls exist to calibrate, corroborate, and validate these internal inputs, these internal inputs require the use of judgment and can have a significant impact on the determination of the loan’s value. Accordingly, we classified all automotive loans held-for-sale as Level 3 as of December 31, 2014. Loans held-for-sale classified as Level 2 as of December 31, 2014, represent mortgage TDR loans valued using quoted prices in active markets for similar assets. • Finance receivables and loans, net — With the exception of mortgage loans held-for-investment, the fair value of finance receivables and loans was based on discounted future cash flows using applicable spreads to approximate current rates applicable to each category of finance receivables and loans (an income approach using Level 3 inputs). The carrying value of commercial receivables in certain markets and certain automotive and other receivables for which interest rates reset on a short-term basis with applicable market indices are assumed to approximate fair value either because of the short-term nature or because of the interest rate adjustment feature. The fair value of commercial receivables in other markets was based on discounted future cash flows using applicable spreads to approximate current rates applicable to similar assets in those markets. For consumer mortgage loans, we used valuation methods and assumptions similar to those used for mortgage loans held-for-sale. These valuations consider unique attributes of the loans such as geography, delinquency status, product type, and other factors. Refer to the section above titled Mortgage loans held-for-sale, net , for a description of methodologies and assumptions used to determine the fair value of mortgage loans held-for-sale. • Deposit liabilities — Deposit liabilities represent certain consumer and brokered bank deposits, mortgage escrow deposits, and dealer deposits. The fair value of deposits at Level 3 were estimated by discounting projected cash flows based on discount factors derived from the forward interest rate swap curve. • Short-term borrowings and Long-term debt — Level 2 debt was valued using quoted market prices for similar instruments, when available, or other means for substantiation with observable inputs. Debt valued by discounting projected cash flows using internally derived inputs, such as prepayment speeds and discount rates, was classified as Level 3.

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities	9 Months Ended
	Sep. 30, 2015
Offsetting [Abstract]
Assets and Liabilities Subject to Enforceable Master Netting Arrangements [Text Block]	Offsetting Assets and Liabilities Our derivative contracts and repurchase/reverse repurchase transactions are supported by qualifying master netting and master repurchase agreements. These agreements are legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the agreement to the non-defaulting entity upon an event of default of the counterparty, including bankruptcy, insolvency, or similar proceeding, and (2) provide the non-defaulting entity the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to liquidate or set off collateral promptly upon an event of default of the counterparty. To further mitigate the risk of counterparty default related to derivative instruments, we maintain collateral agreements with certain counterparties. The agreements require both parties to maintain collateral in the event the fair values of the derivative financial instruments meet established thresholds. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls, such that the net replacement cost of the non-defaulting party is covered in the event of counterparty default. In certain instances as it relates to our derivative instruments, we have the option to report derivative assets and liabilities as well as assets and liabilities associated with cash collateral received or delivered that is governed by a master netting agreement on a net basis as long as certain qualifying criteria are met. Similarly, for our repurchase/reverse repurchase transactions, we have the option to report recognized assets and liabilities subject to a master netting agreement on a net basis if certain qualifying criteria are met. At September 30, 2015 , these instruments are reported as gross assets and gross liabilities on the Condensed Consolidated Balance Sheet . The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows. Gross Amounts of Recognized Assets/(Liabilities) Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets/(Liabilities) Presented in the Condensed Consolidated Balance Sheet Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet September 30, 2015 ( $ in millions ) Financial Instruments Collateral (a) (b) (c) Net Amount Assets Derivative assets in net asset positions $ 298 $ — $ 298 $ (114 ) $ (122 ) $ 62 Derivative assets in net liability positions 1 — 1 (1 ) — — Total assets (d) $ 299 $ — $ 299 $ (115 ) $ (122 ) $ 62 Liabilities Derivative liabilities in net liability positions $ (54 ) $ — $ (54 ) $ 1 $ 11 $ (42 ) Derivative liabilities in net asset positions (114 ) — (114 ) 114 — — Derivative liabilities with no offsetting arrangements (8 ) — (8 ) — — (8 ) Total derivative liabilities (d) (176 ) — (176 ) 115 11 (50 ) Securities sold under agreements to repurchase (e) (1,520 ) — (1,520 ) — 1,520 — Total liabilities $ (1,696 ) $ — $ (1,696 ) $ 115 $ 1,531 $ (50 ) (a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty. (b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and non-cash collateral received. $8 million of non-cash derivative collateral pledged to us was excluded at September 30, 2015 . We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met. (c) Certain agreements grant us the right to sell or pledge the non-cash assets we receive as collateral. Non-cash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $8 million at September 30, 2015 . We have not sold or pledged any of the non-cash collateral received under these agreements as of September 30, 2015 . (d) For additional information on derivative instruments and hedging activities, refer to Note 20 . (e) For additional information on securities sold under agreements to repurchase, refer to Note 13 . Gross Amounts of Recognized Assets/(Liabilities) Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets/(Liabilities) Presented in the Condensed Consolidated Balance Sheet Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet December 31, 2014 ( $ in millions ) Financial Instruments Collateral (a) Net Amount Assets Derivative assets in net asset positions $ 216 $ — $ 216 $ (60 ) $ (68 ) $ 88 Derivative assets in net liability positions 47 — 47 (47 ) — — Total assets (b) $ 263 $ — $ 263 $ (107 ) $ (68 ) $ 88 Liabilities Derivative liabilities in net liability positions $ (188 ) $ — $ (188 ) $ 47 $ 54 $ (87 ) Derivative liabilities in net asset positions (60 ) — (60 ) 60 — — Derivative liabilities with no offsetting arrangements (4 ) — (4 ) — — (4 ) Total derivative liabilities (b) (252 ) — (252 ) 107 54 (91 ) Securities sold under agreements to repurchase (c) (774 ) — (774 ) — 774 — Total liabilities $ (1,026 ) $ — $ (1,026 ) $ 107 $ 828 $ (91 ) (a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . (c) For additional information on securities sold under agreements to repurchase, refer to Note 13 .

Segment And Geographic Informat

Segment And Geographic Information	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	Segment and Geographic Information Operating segments are defined as components of an enterprise that engage in business activity from which revenues are earned and expenses incurred for which discrete financial information is available that is evaluated regularly by our chief operating decision maker in deciding how to allocate resources and in assessing performance. We report our results of operations on a line-of-business basis through three operating segments: Automotive Finance operations, Insurance operations, and Mortgage operations, with the remaining activity reported in Corporate and Other. The operating segments are determined based on the products and services offered, and reflect the manner in which financial information is currently evaluated by management. The following is a description of each of our reportable operating segments. Automotive Finance operations — Provides automotive financing services to consumers and automotive dealers. Our automotive financing services include providing retail installment sales financing, loans, and leases; offering term loans to dealers, financing dealer floorplans and other lines of credit to dealers; fleet financing, and vehicle remarketing services. Insurance operations — Offers both consumer financial and insurance products sold primarily through the automotive dealer channel, and commercial insurance products sold to dealers. As part of our focus on offering dealers a broad range of consumer financial and insurance products, we provide vehicle service contracts, maintenance coverage, and guaranteed automobile protection (GAP) products. We also underwrite selected commercial insurance coverages, which primarily insure dealers' vehicle inventories. Mortgage operations — Our ongoing Mortgage operations include the management of our held-for-investment mortgage portfolio and includes the execution of bulk purchases of high-quality jumbo mortgage loans originated by third parties. Corporate and Other primarily consists of Corporate Finance, centralized corporate treasury activities, such as management of the cash and corporate investment securities portfolios, short- and long-term debt, retail and brokered deposit liabilities, derivative instruments, the amortization of the discount associated with debt issuances and bond exchanges, and the residual impacts of our corporate funds-transfer pricing (FTP) and treasury asset liability management (ALM) activities. Corporate and Other also includes certain equity investments, overhead that was previously allocated to operations that have since been sold or classified as discontinued operations, and reclassifications and eliminations between the reportable operating segments. Corporate Finance provides senior secured commercial-lending products to primarily U.S.-based middle market companies. We utilize an FTP methodology for the majority of our business operations. The FTP methodology assigns charge rates and credit rates to classes of assets and liabilities based on expected duration and the LIBOR swap curve plus an assumed credit spread. Matching duration allocates interest income and interest expense to these reportable segments so their respective results are insulated from interest rate risk. This methodology is consistent with our ALM practices, which includes managing interest rate risk centrally at a corporate level. The net residual impact of the FTP methodology is included within the results of Corporate and Other. The information presented in our reportable operating segments and geographic areas tables that follow are based in part on internal allocations, which involve management judgment. Financial information for our reportable operating segments is summarized as follows. Three months ended September 30, ($ in millions) Automotive Finance operations Insurance operations Mortgage operations Corporate and Other (a) Consolidated (b) 2015 Net financing revenue $ 870 $ 16 $ 20 $ 64 $ 970 Other revenue 63 233 10 26 332 Total net revenue 933 249 30 90 1,302 Provision for loan losses 201 — 6 4 211 Total noninterest expense 385 209 17 63 674 Income from continuing operations before income tax expense $ 347 $ 40 $ 7 $ 23 $ 417 Total assets $ 113,843 $ 6,997 $ 9,772 $ 25,493 $ 156,105 2014 Net financing revenue $ 850 $ 16 $ 9 $ 14 $ 889 Other revenue 69 287 — 19 375 Total net revenue 919 303 9 33 1,264 Provision for loan losses 109 — (7 ) — 102 Total noninterest expense 395 243 19 85 742 Income (loss) from continuing operations before income tax expense $ 415 $ 60 $ (3 ) $ (52 ) $ 420 Total assets $ 110,937 $ 7,178 $ 7,402 $ 23,678 $ 149,195 (a) Total assets for Corporate Finance were $2.3 billion and $1.7 billion at September 30, 2015 , and 2014 , respectively. (b) Net financing revenue after the provision for loan losses totaled $759 million and $787 million for the three months ended September 30, 2015 , and 2014 , respectively. Nine months ended September 30, ($ in millions) Automotive Finance operations Insurance operations Mortgage operations Corporate and Other (a) Consolidated (b) 2015 Net financing revenue $ 2,529 $ 42 $ 50 $ 115 $ 2,736 Other revenue (loss) 170 769 84 (237 ) 786 Total net revenue (loss) 2,699 811 134 (122 ) 3,522 Provision for loan losses 460 — 4 3 467 Total noninterest expense 1,160 678 46 209 2,093 Income (loss) from continuing operations before income tax expense $ 1,079 $ 133 $ 84 $ (334 ) $ 962 Total assets $ 113,843 $ 6,997 $ 9,772 $ 25,493 $ 156,105 2014 Net financing revenue (loss) $ 2,554 $ 47 $ 35 $ (60 ) $ 2,576 Other revenue 195 849 13 4 1,061 Total net revenue (loss) 2,749 896 48 (56 ) 3,637 Provision for loan losses 367 — (55 ) (10 ) 302 Total noninterest expense 1,167 785 62 262 2,276 Income (loss) from continuing operations before income tax expense $ 1,215 $ 111 $ 41 $ (308 ) $ 1,059 Total assets $ 110,937 $ 7,178 $ 7,402 $ 23,678 $ 149,195 (a) Total assets for Corporate Finance were $2.3 billion and $1.7 billion at September 30, 2015 , and 2014 , respectively. (b) Net financing revenue after the provision for loan losses totaled $2.3 billion for each of the nine months ended September 30, 2015 , and 2014 , respectively. Information concerning principal geographic areas was as follows. Three months ended September 30, ($ in millions) Revenue (a) Income (loss) Net income (b)(c) 2015 Canada $ 24 $ 11 $ 9 Europe — 1 — Asia-Pacific — — — Total foreign (d) 24 12 9 Total domestic (e) 1,278 405 259 Total $ 1,302 $ 417 $ 268 2014 Canada $ 31 $ 7 $ 9 Europe — (1 ) 1 Asia-Pacific — — 29 Total foreign 31 6 39 Total domestic (e) 1,233 414 384 Total $ 1,264 $ 420 $ 423 (a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements . (b) Domestic amounts include original discount amortization of $16 million and $51 million for the three months ended September 30, 2015 , and 2014 , respectively. (c) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated. (d) Our foreign operations as of September 30, 2015 , consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down. (e) Amounts include eliminations between our domestic and foreign operations. Nine months ended September 30, ($ in millions) Revenue (a) Income Net income (loss) (b)(c) 2015 Canada $ 76 $ 35 $ 30 Europe 1 5 28 Latin America — — — Asia-Pacific — — 452 Total foreign (d) 77 40 510 Total domestic (e) 3,445 922 516 Total $ 3,522 $ 962 $ 1,026 2014 Canada $ 95 $ 36 $ 55 Europe 2 — 5 Latin America — — (8 ) Asia-Pacific — — 95 Total foreign 97 36 147 Total domestic (e) 3,540 1,023 826 Total $ 3,637 $ 1,059 $ 973 (a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements . (b) Domestic amounts include original discount amortization of $45 million and $149 million for the nine months ended September 30, 2015 , and 2014 , respectively. (c) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated. (d) Our foreign operations as of September 30, 2015 , consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down. (e) Amounts include eliminations between our domestic and foreign operations.

Parent And Guarantor Consolidat

Parent And Guarantor Consolidating Financial Statements	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Guarantor Financial Statements [Text Block]	Parent and Guarantor Condensed Consolidating Financial Statements Certain of our senior notes issued by the parent are guaranteed by 100% directly owned subsidiaries of Ally (the Guarantors). As of September 30, 2015 , the Guarantors include Ally US LLC and IB Finance, each of which fully and unconditionally guarantee the senior notes on a joint and several basis. The following financial statements present condensed consolidating financial data for (i) Ally Financial Inc. (on a parent company-only basis); (ii) the Guarantors; (iii) the nonguarantor subsidiaries (all other subsidiaries); and (iv) an elimination column for adjustments to arrive at (v) the information for the parent company, the Guarantors, and nonguarantors on a consolidated basis. Investments in subsidiaries are accounted for by the parent company and the Guarantors using the equity-method for this presentation. Results of operations of subsidiaries are therefore classified in the parent company’s and Guarantors’ investment in subsidiaries accounts. The elimination entries set forth in the following condensed consolidating financial statements eliminate distributed and undistributed income of subsidiaries, investments in subsidiaries, and intercompany balances and transactions between the parent, the Guarantors, and nonguarantors. Condensed Consolidating Statements of Comprehensive Income Three months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (33 ) $ — $ 1,199 $ — $ 1,166 Interest and fees on finance receivables and loans — intercompany 3 — 1 (4 ) — Interest on loans held-for-sale — — 2 — 2 Interest and dividends on available-for-sale investment securities — — 102 — 102 Interest on cash and cash equivalents — — 2 — 2 Interest-bearing cash — intercompany — — 2 (2 ) — Operating leases 1 — 829 — 830 Total financing revenue and other interest income (29 ) — 2,137 (6 ) 2,102 Interest expense Interest on deposits 3 — 178 — 181 Interest on short-term borrowings 10 — 3 — 13 Interest on long-term debt 272 — 138 — 410 Interest on intercompany debt 3 — 3 (6 ) — Total interest expense 288 — 322 (6 ) 604 Depreciation expense on operating lease assets 1 — 527 — 528 Net financing (loss) revenue (318 ) — 1,288 — 970 Cash dividends from subsidiaries Nonbank subsidiaries 494 — — (494 ) — Other revenue Servicing fees 289 — 210 (487 ) 12 Insurance premiums and service revenue earned — — 236 — 236 Loss on mortgage and automotive loans, net (1 ) — (1 ) — (2 ) Other gain on investments, net — — 6 — 6 Other income, net of losses 78 — 119 (117 ) 80 Total other revenue 366 — 570 (604 ) 332 Total net revenue 542 — 1,858 (1,098 ) 1,302 Provision for loan losses 48 — 163 — 211 Noninterest expense Compensation and benefits expense 138 — 212 (115 ) 235 Insurance losses and loss adjustment expenses — — 61 — 61 Other operating expenses 315 — 552 (489 ) 378 Total noninterest expense 453 — 825 (604 ) 674 Income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries 41 — 870 (494 ) 417 Income tax (benefit) expense from continuing operations (30 ) — 174 — 144 Net income from continuing operations 71 — 696 (494 ) 273 Loss from discontinued operations, net of tax (5 ) — — — (5 ) Undistributed income (loss) of subsidiaries Bank subsidiary 254 254 — (508 ) — Nonbank subsidiaries (52 ) (1 ) — 53 — Net income 268 253 696 (949 ) 268 Other comprehensive income, net of tax 61 65 55 (120 ) 61 Comprehensive income $ 329 $ 318 $ 751 $ (1,069 ) $ 329 Three months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ 16 $ — $ 1,098 $ — $ 1,114 Interest and fees on finance receivables and loans — intercompany 10 — 21 (31 ) — Interest and dividends on available-for-sale investment securities — — 94 — 94 Interest on cash and cash equivalents — — 2 — 2 Interest-bearing cash - intercompany — — 1 (1 ) — Operating leases 1 — 898 — 899 Total financing revenue and other interest income 27 — 2,114 (32 ) 2,109 Interest expense Interest on deposits 3 — 163 — 166 Interest on short-term borrowings 10 — 2 — 12 Interest on long-term debt 350 — 143 — 493 Interest on intercompany debt 22 — 10 (32 ) — Total interest expense 385 — 318 (32 ) 671 Depreciation expense on operating lease assets (4 ) — 553 — 549 Net financing (loss) revenue (354 ) — 1,243 — 889 Cash dividends from subsidiaries Bank subsidiaries 150 150 — (300 ) — Nonbank subsidiaries 141 — — (141 ) — Other revenue Servicing fees 6 — — — 6 Insurance premiums and service revenue earned — — 246 — 246 (Loss) gain on mortgage and automotive loans, net (2 ) — 2 — — Other gain on investments, net — — 45 — 45 Other income, net of losses 206 — 373 (501 ) 78 Total other revenue 210 — 666 (501 ) 375 Total net revenue 147 150 1,909 (942 ) 1,264 Provision for loan losses 88 — 14 — 102 Noninterest expense Compensation and benefits expense 153 — 199 (111 ) 241 Insurance losses and loss adjustment expenses — — 97 — 97 Other operating expenses 252 — 542 (390 ) 404 Total noninterest expense 405 — 838 (501 ) 742 (Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries (346 ) 150 1,057 (441 ) 420 Income tax (benefit) expense from continuing operations (68 ) — 195 — 127 Net (loss) income from continuing operations (278 ) 150 862 (441 ) 293 Income from discontinued operations, net of tax 127 — 3 — 130 Undistributed income (loss) of subsidiaries Bank subsidiary 150 150 — (300 ) — Nonbank subsidiaries 424 (2 ) — (422 ) — Net income 423 298 865 (1,163 ) 423 Other comprehensive loss, net of tax (55 ) (3 ) (50 ) 53 (55 ) Comprehensive income $ 368 $ 295 $ 815 $ (1,110 ) $ 368 Nine months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (45 ) $ — $ 3,403 $ — $ 3,358 Interest and fees on finance receivables and loans — intercompany 15 — 22 (37 ) — Interest on loans held-for-sale — — 40 — 40 Interest and dividends on available-for-sale investment securities — — 283 — 283 Interest on cash and cash equivalents 1 — 5 — 6 Interest-bearing cash — intercompany — — 6 (6 ) — Operating leases 1 — 2,585 — 2,586 Total financing revenue and other interest income (28 ) — 6,344 (43 ) 6,273 Interest expense Interest on deposits 8 — 522 — 530 Interest on short-term borrowings 30 — 6 — 36 Interest on long-term debt 856 — 402 — 1,258 Interest on intercompany debt 28 — 15 (43 ) — Total interest expense 922 — 945 (43 ) 1,824 Depreciation expense on operating lease assets 1 — 1,712 — 1,713 Net financing (loss) revenue (951 ) — 3,687 — 2,736 Cash dividends from subsidiaries Bank subsidiary 525 525 — (1,050 ) — Nonbank subsidiaries 980 — — (980 ) — Other revenue Servicing fees 846 — 621 (1,435 ) 32 Insurance premiums and service revenue earned — — 706 — 706 (Loss) gain on mortgage and automotive loans, net (9 ) — 54 — 45 Loss on extinguishment of debt (353 ) — (1 ) — (354 ) Other gain on investments, net — — 106 — 106 Other income, net of losses 199 — 398 (346 ) 251 Total other revenue 683 — 1,884 (1,781 ) 786 Total net revenue 1,237 525 5,571 (3,811 ) 3,522 Provision for loan losses 111 — 356 — 467 Noninterest expense Compensation and benefits expense 431 — 634 (339 ) 726 Insurance losses and loss adjustment expenses — — 239 — 239 Other operating expenses 935 — 1,635 (1,442 ) 1,128 Total noninterest expense 1,366 — 2,508 (1,781 ) 2,093 (Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries (240 ) 525 2,707 (2,030 ) 962 Income tax (benefit) expense from continuing operations (231 ) — 572 — 341 Net (loss) income from continuing operations (9 ) 525 2,135 (2,030 ) 621 Income from discontinued operations, net of tax 367 — 38 — 405 Undistributed income (loss) of subsidiaries Bank subsidiary 302 302 — (604 ) — Nonbank subsidiaries 366 (1 ) — (365 ) — Net income 1,026 826 2,173 (2,999 ) 1,026 Other comprehensive (loss) income, net of tax (56 ) 40 (64 ) 24 (56 ) Comprehensive income $ 970 $ 866 $ 2,109 $ (2,975 ) $ 970 Nine months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (2 ) $ — $ 3,347 $ — $ 3,345 Interest and fees on finance receivables and loans — intercompany 26 — 64 (90 ) — Interest on loans held-for-sale — — 1 — 1 Interest and dividends on available-for-sale investment securities — — 282 — 282 Interest on cash and cash equivalents 1 — 5 — 6 Interest-bearing — intercompany — — 4 (4 ) — Operating leases 269 — 2,384 — 2,653 Total financing revenue and other interest income 294 — 6,087 (94 ) 6,287 Interest expense Interest on deposits 11 — 484 — 495 Interest on short-term borrowings 32 — 8 — 40 Interest on long-term debt 1,143 — 433 — 1,576 Interest on intercompany debt 68 — 26 (94 ) — Total interest expense 1,254 — 951 (94 ) 2,111 Depreciation expense on operating lease assets 164 — 1,436 — 1,600 Net financing (loss) revenue (1,124 ) — 3,700 — 2,576 Cash dividends from subsidiaries Bank subsidiary 1,650 1,650 — (3,300 ) — Nonbank subsidiaries 462 — — (462 ) — Other revenue Servicing fees 22 — — — 22 Insurance premiums and service revenue earned — — 736 — 736 (Loss) gain on mortgage and automotive loans, net (2 ) — 8 — 6 Loss on extinguishment of debt (46 ) — — — (46 ) Other gain on investments, net — — 129 — 129 Other income, net of losses 591 — 1,007 (1,384 ) 214 Total other revenue 565 — 1,880 (1,384 ) 1,061 Total net revenue 1,553 1,650 5,580 (5,146 ) 3,637 Provision for loan losses 165 — 137 — 302 Noninterest expense Compensation and benefits expense 441 — 604 (335 ) 710 Insurance losses and loss adjustment expenses — — 353 — 353 Other operating expenses 648 — 1,614 (1,049 ) 1,213 Total noninterest expense 1,089 — 2,571 (1,384 ) 2,276 Income from continuing operations before income tax (benefit) expense and undistributed (loss) income of subsidiaries 299 1,650 2,872 (3,762 ) 1,059 Income tax (benefit) expense from continuing operations (309 ) — 594 — 285 Net income from continuing operations 608 1,650 2,278 (3,762 ) 774 Income from discontinued operations, net of tax 172 — 27 — 199 Undistributed (loss) income of subsidiaries Bank subsidiary (802 ) (802 ) — 1,604 — Nonbank subsidiaries 995 (2 ) — (993 ) — Net income 973 846 2,305 (3,151 ) 973 Other comprehensive income, net of tax 126 116 124 (240 ) 126 Comprehensive income $ 1,099 $ 962 $ 2,429 $ (3,391 ) $ 1,099 Condensed Consolidating Balance Sheet September 30, 2015 ($ in millions) Parent (a) Guarantors Nonguarantors (a) Consolidating adjustments Ally consolidated Assets Cash and cash equivalents Noninterest-bearing $ 797 $ — $ 869 $ — $ 1,666 Interest-bearing 1,201 — 2,360 — 3,561 Interest-bearing — intercompany — — 722 (722 ) — Total cash and cash equivalents 1,998 — 3,951 (722 ) 5,227 Investment securities — — 18,758 — 18,758 Loans held-for-sale, net — — 37 — 37 Finance receivables and loans, net Finance receivables and loans, net 3,818 — 104,173 — 107,991 Intercompany loans to Nonbank subsidiaries 1,781 — 546 (2,327 ) — Allowance for loan losses (86 ) — (932 ) — (1,018 ) Total finance receivables and loans, net 5,513 — 103,787 (2,327 ) 106,973 Investment in operating leases, net 92 — 17,200 — 17,292 Intercompany receivables from Bank subsidiary 338 — — (338 ) — Nonbank subsidiaries 218 — 242 (460 ) — Investment in subsidiaries Bank subsidiary 16,296 16,296 — (32,592 ) — Nonbank subsidiaries 10,931 12 — (10,943 ) — Premiums receivable and other insurance assets — — 1,816 (22 ) 1,794 Other assets 4,932 — 3,971 (2,879 ) 6,024 Total assets $ 40,318 $ 16,308 $ 149,762 $ (50,283 ) $ 156,105 Liabilities Deposit liabilities Noninterest-bearing $ — $ — $ 91 $ — $ 91 Interest-bearing 248 — 63,702 — 63,950 Total deposit liabilities 248 — 63,793 — 64,041 Short-term borrowings 3,458 — 1,920 — 5,378 Long-term debt 19,820 — 47,641 — 67,461 Intercompany debt to Nonbank subsidiaries 1,268 — 1,781 (3,049 ) — Intercompany payables to Bank subsidiary 24 — — (24 ) — Nonbank subsidiaries 374 — 420 (794 ) — Interest payable 223 — 214 — 437 Unearned insurance premiums and service revenue — — 2,438 — 2,438 Accrued expenses and other liabilities 304 82 4,245 (2,880 ) 1,751 Total liabilities 25,719 82 122,452 (6,747 ) 141,506 Total equity 14,599 16,226 27,310 (43,536 ) 14,599 Total liabilities and equity $ 40,318 $ 16,308 $ 149,762 $ (50,283 ) $ 156,105 (a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership. December 31, 2014 ($ in millions) Parent (a) Guarantors Nonguarantors (a) Consolidating adjustments Ally consolidated Assets Cash and cash equivalents Noninterest-bearing $ 986 $ — $ 362 $ — $ 1,348 Interest-bearing 1,300 — 2,928 — 4,228 Interest-bearing — intercompany — — 615 (615 ) — Total cash and cash equivalents 2,286 — 3,905 (615 ) 5,576 Investment securities — — 16,137 — 16,137 Loans held-for-sale, net 3 — 2,000 — 2,003 Finance receivables and loans, net Finance receivables and loans, net 4,225 — 95,723 — 99,948 Intercompany loans to Bank subsidiary 625 — — (625 ) — Nonbank subsidiaries 3,500 — 1,770 (5,270 ) — Allowance for loan losses (102 ) — (875 ) — (977 ) Total finance receivables and loans, net 8,248 — 96,618 (5,895 ) 98,971 Investment in operating leases, net — — 19,510 — 19,510 Intercompany receivables from Bank subsidiary 219 — — (219 ) — Nonbank subsidiaries 267 — 393 (660 ) — Investment in subsidiaries Bank subsidiary 15,967 15,967 — (31,934 ) — Nonbank subsidiaries 11,559 12 — (11,571 ) — Premiums receivable and other insurance assets — — 1,717 (22 ) 1,695 Other assets 4,889 — 4,879 (2,466 ) 7,302 Assets of operations held-for-sale 634 — — — 634 Total assets $ 44,072 $ 15,979 $ 145,159 $ (53,382 ) $ 151,828 Liabilities Deposit liabilities Noninterest-bearing $ — $ — $ 64 $ — $ 64 Interest-bearing 319 — 57,839 — 58,158 Total deposit liabilities 319 — 57,903 — 58,222 Short-term borrowings 3,338 — 3,724 — 7,062 Long-term debt 21,199 — 45,359 — 66,558 Intercompany debt to Nonbank subsidiaries 2,385 — 4,125 (6,510 ) — Intercompany payables to Bank subsidiary 94 — — (94 ) — Nonbank subsidiaries 454 — 354 (808 ) — Interest payable 316 — 161 — 477 Unearned insurance premiums and service revenue — — 2,375 — 2,375 Accrued expenses and other liabilities 568 82 3,551 (2,466 ) 1,735 Total liabilities 28,673 82 117,552 (9,878 ) 136,429 Total equity 15,399 15,897 27,607 (43,504 ) 15,399 Total liabilities and equity $ 44,072 $ 15,979 $ 145,159 $ (53,382 ) $ 151,828 (a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership. Condensed Consolidating Statement of Cash Flows Nine months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Operating activities Net cash provided by operating activities $ 51 $ 525 $ 5,408 $ (2,030 ) $ 3,954 Investing activities Purchases of available-for-sale securities — — (10,011 ) — (10,011 ) Proceeds from sales of available-for-sale securities — — 4,408 — 4,408 Proceeds from maturities and repayments of available-for-sale securities — — 3,141 — 3,141 Net decrease (increase) in finance receivables and loans 398 — (9,573 ) — (9,175 ) Proceeds from sales of finance receivables and loans — — 2,665 — 2,665 Net decrease in loans — intercompany 2,392 — 1,225 (3,617 ) — Net (increase) decrease in operating lease assets (94 ) — 526 — 432 Capital contributions to subsidiaries (228 ) (1 ) 1 228 — Returns of contributed capital 881 — — (881 ) — Proceeds from sale of business units, net 1,049 — — — 1,049 Net change in restricted cash (12 ) — 501 — 489 Other, net (29 ) — 12 — (17 ) Net cash provided by (used in) investing activities 4,357 (1 ) (7,105 ) (4,270 ) (7,019 ) Financing activities Net change in short-term borrowings — third party 120 — (1,812 ) — (1,692 ) Net (decrease) increase in deposits (72 ) — 5,891 — 5,819 Proceeds from issuance of long-term debt — third party 4,037 — 19,807 — 23,844 Repayments of long-term debt — third party (5,866 ) — (17,588 ) — (23,454 ) Net change in debt — intercompany (1,117 ) — (2,393 ) 3,510 — Repurchase and redemption of preferred stock (442 ) — — — (442 ) Dividends paid — third party (1,356 ) — — — (1,356 ) Dividends paid and returns of contributed capital — intercompany — (525 ) (2,386 ) 2,911 — Capital contributions from parent — 1 227 (228 ) — Net cash (used in) provided by financing activities (4,696 ) (524 ) 1,746 6,193 2,719 Effect of exchange-rate changes on cash and cash equivalents — — (3 ) — (3 ) Net (decrease) increase in cash and cash equivalents (288 ) — 46 (107 ) (349 ) Cash and cash equivalents at beginning of year 2,286 — 3,905 (615 ) 5,576 Cash and cash equivalents at September 30 $ 1,998 $ — $ 3,951 $ (722 ) $ 5,227 Nine months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Operating activities Net cash provided by operating activities $ 544 $ 1,639 $ 4,036 $ (3,761 ) $ 2,458 Investing activities Purchases of available-for-sale securities — — (4,117 ) — (4,117 ) Proceeds from sales of available-for-sale securities — — 2,974 — 2,974 Proceeds from maturities and repayments of available-for-sale securities — — 1,877 — 1,877 Net decrease (increase) in finance receivables and loans 1,669 — (2,936 ) — (1,267 ) Proceeds from sales of finance receivables and loans — — 1,557 — 1,557 Net (increase) decrease in loans — intercompany (104 ) — 147 (43 ) — Net decrease (increase) in operating lease assets 146 — (3,411 ) — (3,265 ) Capital contributions to subsidiaries (744 ) — — 744 — Returns of contributed capital 1,251 — — (1,251 ) — Proceeds from sale of business unit, net 46 — 1 — 47 Net change in restricted cash — — 2,128 — 2,128 Other, net (17 ) — 88 — 71 Net cash provided by (used in) investing activities 2,247 — (1,692 ) (550 ) 5 Financing activities Net change in short-term borrowings — third party 151 — (3,449 ) — (3,298 ) Net (decrease) increase in deposits (72 ) — 3,573 — 3,501 Proceeds from issuance of long-term debt — third party 2,310 — 16,632 — 18,942 Repayments of long-term debt — third party (5,535 ) — (15,704 ) — (21,239 ) Net change in debt — intercompany (143 ) — 104 39 — Dividends paid — third party (200 ) — — — (200 ) Dividends paid and returns of contributed capital — intercompany — (1,676 ) (3,337 ) 5,013 — Capital contributions from parent — — 744 (744 ) — Net cash used in financing activities (3,489 ) (1,676 ) (1,437 ) 4,308 (2,294 ) Effect of exchange-rate changes on cash and cash equivalents — — (1 ) — (1 ) Net (decrease) increase in cash and cash equivalents (698 ) (37 ) 906 (3 ) 168 Cash and cash equivalents at beginning of year 2,930 37 2,974 (410 ) 5,531 Cash and cash equivalents at September 30 $ 2,232 $ — $ 3,880 $ (413 ) $ 5,699

Contingencies And Other Risks

Contingencies And Other Risks	9 Months Ended
	Sep. 30, 2015
Loss Contingency [Abstract]
Contingencies Disclosure and Other Risks [Text Block]	Contingencies and Other Risks In the normal course of business, we enter into transactions that expose us to varying degrees of risk. For additional information on contingencies and other risks arising from such transactions, refer to Note 30 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K. Legal Proceedings We are or may be subject to potential liability under various governmental proceedings, claims, and legal actions that are pending or otherwise asserted against us. We are named as defendants in a number of legal actions, and we are involved in governmental proceedings arising in connection with our respective businesses. Some of the pending actions purport to be class actions, and certain legal actions include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages. We establish reserves for legal claims when payments associated with the claims become probable and the payments can be reasonably estimated. Given the inherent difficulty of predicting the outcome of litigation and regulatory matters, it is generally very difficult to predict what the eventual outcome will be, and when the matter will be resolved. The actual costs of resolving legal claims may be higher or lower than any amounts reserved for the claims. On the basis of information currently available, advice of counsel, available insurance coverage, and established reserves, it is the opinion of management that the eventual outcome of the current actions against us will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows. However, it is possible that the ultimate resolution of legal matters, if unfavorable, may be material to our consolidated financial condition, results of operations, or cash flows in a particular period. Regulatory Matters Ally and its subsidiaries, including Ally Bank, are or may become involved from time to time in formal and informal reviews, investigations, examinations, proceedings, and information-gathering requests by federal and state government and self-regulatory agencies, including, among others, the U.S. Department of Justice (DOJ), SEC, Consumer Financial Protection Bureau (CFPB), the FRB, the FDIC, the Utah Department of Financial Institutions, and the Federal Trade Commission regarding their respective operations. Mortgage Matters We have received subpoenas from the DOJ that include a broad request for documentation and other information relating to residential mortgage-backed securities issued by our former mortgage subsidiary, Residential Capital, LLC and its subsidiaries (ResCap RMBS). In connection with these requests, the DOJ is investigating potential fraud and other potential legal claims related to ResCap RMBS, including its investigation of potential claims under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989. The DOJ is also investigating potential claims under the False Claims Act (FCA) related to representations made by us in connection with investments in Ally made by the United States Department of the Treasury pursuant to the Troubled Asset Relief Program in 2008 and 2009 regarding certain claims against Residential Capital, LLC or its subsidiaries at that time. We continue to engage in discussions with the DOJ with respect to legal and factual aspects of their investigations and potential claims. Further, at the request of the DOJ, we have entered into an agreement to voluntarily extend the statutes of limitations related to potential FCA claims to the end of January 2016. We have separately received subpoenas and document requests from the SEC that include information covering a wide range of mortgage-related matters. These matters could result in material adverse consequences including, without limitation, adverse judgments, significant settlements, fines, penalties, injunctions, or other actions. Automotive Subprime Matters In October 2014, we received a document request from the SEC in connection with its investigation related to subprime automotive finance and related securitization activities. Separately, in December 2014, we received a subpoena from the DOJ requesting similar information. In May 2015, we received an information request from the New York Department of Financial Services requesting similar information. We are currently cooperating with each of these agencies with respect to these matters. These matters could result in material adverse consequences including, without limitation, adverse judgments, significant settlements, fines, penalties, injunctions, or other actions. CFPB In December 2013, Ally Financial Inc. and Ally Bank entered into Consent Orders issued by the CFPB and the DOJ pertaining to the allegation of disparate impact in the automotive finance business. The Consent Orders require Ally to create a compliance plan addressing, at a minimum, the communication of Ally’s expectations of Equal Credit Opportunity Act compliance to dealers, maintenance of Ally’s existing limits on dealer finance income for contracts acquired by Ally, and monitoring for potential discrimination both at the dealer level and within our portfolio of contracts acquired across all dealers. Ally formed a compliance committee consisting of certain Ally and Ally Bank directors to oversee Ally’s execution of the Consent Orders’ terms. Ally is required to meet certain stipulations under the Consent Orders, including a requirement to make monetary payments when ongoing remediation targets are not attained. These matters could result in material adverse consequences including, without limitation, adverse judgments, significant settlements, fines, penalties, injunctions, or other actions. Other Contingencies We are subject to potential liability under various other exposures including tax, nonrecourse loans, self-insurance, and other miscellaneous contingencies. We establish reserves for these contingencies when the loss becomes probable and the amount can be reasonably estimated. The actual costs of resolving these items may be substantially higher or lower than the amounts reserved for any one item. Based on information currently available, it is the opinion of management that the eventual outcome of these items will not have a material adverse impact on our results of operations, financial position, or cash flows.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Declaration of Quarterly Dividend Payments On October 21, 2015 , the Ally Board of Directors declared quarterly dividend payments on certain outstanding preferred stock. This included a cash dividend of $17.31 per share, or a total of $22 million , on Fixed Rate Cumulative Perpetual Preferred Stock, Series G; and a cash dividend of $0.53 per share, or a total of $15 million , on Fixed Rate/Floating Rate Perpetual Preferred Stock, Series A. The dividends are payable to shareholders of record as of November 1, 2015 , and are payable on November 16, 2015 .

Description Of Business, Basi34

Description Of Business, Basis of Presentation, And Changes in Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Income Tax, Policy [Policy Text Block]	Income Taxes In calculating the provision for interim income taxes, in accordance with Accounting Standards Codification (ASC) 740, Income Taxes , we apply an estimated annual effective tax rate to year-to-date ordinary income. At the end of each interim period, we estimate the effective tax rate expected to be applicable for the full fiscal year. This method differs from that described in Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K, which describes our annual significant income tax accounting policy and related methodology.
Discontinued Operations, Policy [Policy Text Block]	Discontinued Operations Prior to the adoption of ASU 2014-08, which is to be prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income . The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted.

Discontinued and Held-for-sal35

Discontinued and Held-for-sale Operations Discontinued and Held-for-sale Operations (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Discontinued Operations, Policy [Policy Text Block]	Discontinued Operations Prior to the adoption of ASU 2014-08, which is to be prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income . The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted.

Discontinued and Held-for-sal36

Discontinued and Held-for-sale Operations (Tables)	9 Months Ended
	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	Select financial information of discontinued operations is summarized below. The pretax income or loss, including direct costs to transact a sale, includes any impairment recognized to present the operations at the lower-of-cost or fair value. Fair value was based on the estimated sales price, which could differ from the ultimate sales price due to price volatility, changing interest rates, changing foreign-currency rates, and future economic conditions. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Select Automotive Finance operations Total net revenue $ — $ 29 $ — $ 95 Pretax (loss) income including direct costs to transact a sale (a) (1 ) 46 452 101 Tax expense (b) 3 — 68 4 Other operations Pretax (loss) income $ (1 ) $ 5 $ 19 $ 25 Tax benefit — (79 ) (2 ) (77 ) (a) Includes certain treasury and other corporate activity recognized by Corporate and Other. (b) Includes certain income tax activity recognized by Corporate and Other.

Other Income, Net Of Losses (Ta

Other Income, Net Of Losses (Tables)	9 Months Ended
	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Schedule of Other Nonoperating Income, by Component [Table Text Block]	Details of other income, net of losses, were as follows. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Remarketing fees $ 25 $ 28 $ 78 $ 85 Late charges and other administrative fees 23 23 66 66 Income from equity-method investments 11 5 48 13 Other, net 21 22 59 50 Total other income, net of losses $ 80 $ 78 $ 251 $ 214

Other Operating Expenses (Table

Other Operating Expenses (Tables)	9 Months Ended
	Sep. 30, 2015
Operating Expenses [Abstract]
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]	Details of other operating expenses were as follows. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Insurance commissions $ 95 $ 95 $ 283 $ 279 Technology and communications 65 77 198 255 Lease and loan administration 31 32 92 92 Advertising and marketing 26 27 80 81 Professional services 23 20 68 73 Premises and equipment depreciation 20 23 62 61 Regulatory and licensing fees 18 23 59 69 Vehicle remarketing and repossession 20 22 56 61 Occupancy 13 12 38 34 Non-income taxes 11 12 26 32 Other 56 61 166 176 Total other operating expenses $ 378 $ 404 $ 1,128 $ 1,213

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, and other investments. The cost, fair value, and gross unrealized gains and losses on available-for-sale securities were as follows. September 30, 2015 December 31, 2014 Amortized cost Gross unrealized Fair Amortized cost Gross unrealized Fair ($ in millions) gains losses gains losses Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 1,805 $ 5 $ (1 ) $ 1,809 $ 1,195 $ 1 $ (18 ) $ 1,178 U.S. States and political subdivisions 635 17 (1 ) 651 389 17 — 406 Foreign government 176 8 — 184 224 8 — 232 Mortgage-backed residential (a) 11,560 130 (76 ) 11,614 10,431 119 (125 ) 10,425 Mortgage-backed commercial 519 — (2 ) 517 254 — (1 ) 253 Asset-backed 1,947 6 (2 ) 1,951 1,989 5 (3 ) 1,991 Corporate debt 1,043 13 (9 ) 1,047 734 14 (2 ) 746 Total debt securities (b) (c) 17,685 179 (91 ) 17,773 15,216 164 (149 ) 15,231 Equity securities 1,097 1 (113 ) 985 891 49 (34 ) 906 Total available-for-sale securities $ 18,782 $ 180 $ (204 ) $ 18,758 $ 16,107 $ 213 $ (183 ) $ 16,137 (a) Residential mortgage-backed securities include agency-backed bonds totaling $8,536 million and $7,557 million at September 30, 2015 , and December 31, 2014 , respectively. (b) Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. Amounts deposited totaled $15 million at both September 30, 2015 , and December 31, 2014 . (c) Investment securities with a fair value of $1,702 million and $801 million at September 30, 2015 , and December 31, 2014 , were pledged to secure short-term borrowings or repurchase agreements and for other purposes as required by contractual obligation or law. Under these agreements, Ally has granted the counterparty the right to sell or pledge the underlying investment securities.
Investments Classified by Contractual Maturity Date [Table Text Block]	The maturity distribution of available-for-sale debt securities outstanding is summarized in the following tables. Prepayments may cause actual maturities to differ from contractual maturities. Total Due in one year or less Due after one year through five years Due after five years through ten years Due after ten years (a) ($ in millions) Amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2015 Fair value of available-for-sale debt securities U.S. Treasury and federal agencies $ 1,809 1.6 % $ 7 5.0 % $ 905 1.2 % $ 897 2.1 % $ — — % U.S. States and political subdivisions 651 3.3 53 2.2 48 2.2 130 2.9 420 3.7 Foreign government 184 2.6 9 1.4 82 2.7 93 2.7 — — Mortgage-backed residential 11,614 2.8 — — 38 2.1 40 2.5 11,536 2.8 Mortgage-backed commercial 517 1.9 — — — — 3 2.7 514 1.9 Asset-backed 1,951 2.1 4 1.4 1,189 2.0 553 2.4 205 2.2 Corporate debt 1,047 2.9 48 3.1 601 2.5 368 3.3 30 5.5 Total available-for-sale debt securities $ 17,773 2.6 $ 121 2.6 $ 2,863 1.9 $ 2,084 2.5 $ 12,705 2.8 Amortized cost of available-for-sale debt securities $ 17,685 $ 120 $ 2,854 $ 2,067 $ 12,644 December 31, 2014 Fair value of available-for-sale debt securities U.S. Treasury and federal agencies $ 1,178 1.5 % $ 7 3.0 % $ 677 1.2 % $ 494 1.9 % $ — — % U.S. States and political subdivisions 406 3.7 34 1.9 12 2.1 106 3.0 254 4.3 Foreign government 232 2.7 — — 128 2.5 104 2.9 — — Mortgage-backed residential 10,425 2.6 34 3.1 58 2.1 — — 10,333 2.6 Mortgage-backed commercial 253 1.5 — — 30 1.8 — — 223 1.4 Asset-backed 1,991 1.9 — — 1,311 1.9 463 2.0 217 2.2 Corporate debt 746 3.2 33 3.1 460 2.7 216 3.8 37 5.6 Total available-for-sale debt securities $ 15,231 2.5 $ 108 2.7 $ 2,676 1.9 $ 1,383 2.4 $ 11,064 2.6 Amortized cost of available-for-sale debt securities $ 15,216 $ 108 $ 2,674 $ 1,374 $ 11,060 (a) Actual maturities may differ from contractual maturities due to call or prepayment options.
Investment Income [Table Text Block]	The following table presents interest and dividends on available-for-sale securities. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Taxable interest $ 90 $ 87 $ 252 $ 256 Taxable dividends 7 6 18 18 Interest and dividends exempt from U.S. federal income tax 5 1 13 8 Interest and dividends on available-for-sale securities $ 102 $ 94 $ 283 $ 282
Schedule of Realized Gain (Loss) [Table Text Block]	The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Gross realized gains $ 28 $ 48 $ 134 $ 150 Gross realized losses (11 ) (3 ) (14 ) (11 ) Other-than-temporary impairment (11 ) — (14 ) (10 ) Other gain on investments, net $ 6 $ 45 $ 106 $ 129
Schedule of Unrealized Loss on Investments [Table Text Block]	The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the methodology that was applied to these securities, we believe that the unrealized losses relate to factors other than credit losses in the current market environment. As of September 30, 2015 , we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As of September 30, 2015 , we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at September 30, 2015 . Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments. September 30, 2015 December 31, 2014 Less than 12 months 12 months or longer Less than 12 months 12 months or longer ($ in millions) Fair Unrealized Fair Unrealized Fair Unrealized Fair Unrealized Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 220 $ — $ 373 $ (1 ) $ 297 $ (3 ) $ 859 $ (15 ) U.S. States and political subdivisions 173 (1 ) — — 50 — — — Foreign government 9 — — — — — — — Mortgage-backed 1,731 (11 ) 2,517 (67 ) 1,172 (10 ) 3,098 (116 ) Asset-backed 696 (2 ) 24 — 819 (3 ) 8 — Corporate debt 449 (8 ) 10 (1 ) 132 (2 ) 11 — Total temporarily impaired debt securities 3,278 (22 ) 2,924 (69 ) 2,470 (18 ) 3,976 (131 ) Temporarily impaired equity securities 793 (84 ) 68 (29 ) 231 (24 ) 40 (10 ) Total temporarily impaired available-for-sale securities $ 4,071 $ (106 ) $ 2,992 $ (98 ) $ 2,701 $ (42 ) $ 4,016 $ (141 )

Loans Held-for-Sale, Net Loan40

Loans Held-for-Sale, Net Loans Held-for-Sale, Net (Tables)	9 Months Ended
	Sep. 30, 2015
Loans Held-for-Sale, Net [Abstract]
Loans Held-for-Sale, Net [Table Text Block]	The composition of loans held-for-sale, net, was as follows. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive $ — $ 1,515 Consumer mortgage — 452 Commercial and industrial — Other 37 36 Total loans held-for-sale, net $ 37 $ 2,003

Finance Receivables And Loans41

Finance Receivables And Loans, Net (Tables)	9 Months Ended
	Sep. 30, 2015
Loans and Leases Receivable, Net Reported Amount, by Category Alternative [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The composition of finance receivables and loans, net, reported at carrying value before allowance for loan losses was as follows. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive (a) $ 63,610 $ 56,570 Consumer mortgage (b)(c) 9,770 7,474 Commercial Commercial and industrial Automotive 29,020 30,871 Other 2,289 1,882 Commercial real estate — Automotive 3,302 3,151 Total commercial 34,611 35,904 Total finance receivables and loans (d) $ 107,991 $ 99,948 (a) Includes $107 million and $35 million of fair value adjustment for loans in hedge accounting relationships at September 30, 2015 , and December 31, 2014 , respectively. Refer to Note 20 for additional information. (b) Includes loans originated as interest-only mortgage loans of $1.0 billion and $1.2 billion at September 30, 2015 , and December 31, 2014 , respectively, 8% of which are expected to start principal amortization in the remainder of 2015, 33% in 2016, 21% in 2017, 2% in 2018, and 4% thereafter. (c) Includes consumer mortgages at a fair value of $1 million at both September 30, 2015 , and December 31, 2014 , as a result of fair value option election. (d) Totals include a net increase of $43 million at September 30, 2015 , compared to a net reduction of $266 million at December 31, 2014 , for unearned income, unamortized premiums and discounts, and deferred fees and costs.
Allowance for Credit Losses on Financing Receivables [Table Text Block]	The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans. Three months ended September 30, 2015 ( $ in millions ) Consumer Consumer Commercial Total Allowance at July 1, 2015 $ 767 $ 119 $ 88 $ 974 Charge-offs (220 ) (10 ) (1 ) (231 ) Recoveries 64 4 2 70 Net charge-offs (156 ) (6 ) 1 (161 ) Provision for loan losses 200 6 5 211 Other (a) (7 ) — 1 (6 ) Allowance at September 30, 2015 $ 804 $ 119 $ 95 $ 1,018 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Three months ended September 30, 2014 ( $ in millions ) Consumer Consumer Commercial Total Allowance at July 1, 2014 $ 729 $ 302 $ 140 $ 1,171 Charge-offs (188 ) (13 ) — (201 ) Recoveries 51 1 — 52 Net charge-offs (137 ) (12 ) — (149 ) Provision for loan losses 112 (7 ) (3 ) 102 Other (a) (11 ) — — (11 ) Allowance at September 30, 2014 $ 693 $ 283 $ 137 $ 1,113 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Nine months ended September 30, 2015 ( $ in millions ) Consumer Consumer Commercial Total Allowance at January 1, 2015 $ 685 $ 152 $ 140 $ 977 Charge-offs (579 ) (41 ) (1 ) (621 ) Recoveries 195 12 3 210 Net charge-offs (384 ) (29 ) 2 (411 ) Provision for loan losses 510 4 (47 ) 467 Other (a) (7 ) (8 ) — (15 ) Allowance at September 30, 2015 $ 804 $ 119 $ 95 $ 1,018 Allowance for loan losses at September 30, 2015 Individually evaluated for impairment $ 22 $ 48 $ 19 $ 89 Collectively evaluated for impairment 782 71 76 929 Loans acquired with deteriorated credit quality — — — — Finance receivables and loans at historical cost at September 30, 2015 Ending balance $ 63,610 $ 9,769 $ 34,611 $ 107,990 Individually evaluated for impairment 285 268 75 628 Collectively evaluated for impairment 63,325 9,501 34,536 107,362 Loans acquired with deteriorated credit quality — — — — (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale. Nine months ended September 30, 2014 ( $ in millions ) Consumer Consumer Commercial Total Allowance at January 1, 2014 $ 673 $ 389 $ 146 $ 1,208 Charge-offs (511 ) (38 ) (5 ) (554 ) Recoveries 170 6 11 187 Net charge-offs (341 ) (32 ) 6 (367 ) Provision for loan losses 372 (55 ) (15 ) 302 Other (a) (11 ) (19 ) — (30 ) Allowance at September 30, 2014 $ 693 $ 283 $ 137 $ 1,113 Allowance for loan losses at September 30, 2014 Individually evaluated for impairment $ 25 $ 180 $ 15 $ 220 Collectively evaluated for impairment 668 103 122 893 Loans acquired with deteriorated credit quality — — — — Finance receivables and loans at historical cost at September 30, 2014 Ending balance $ 58,675 $ 7,594 $ 33,248 $ 99,517 Individually evaluated for impairment 289 904 73 1,266 Collectively evaluated for impairment 58,384 6,690 33,175 98,249 Loans acquired with deteriorated credit quality 2 — — 2 (a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.
Schedule Of Sales Of Financing Receivables And Loans [Table Text Block]	The following table presents information about significant sales of finance receivables and loans recorded at historical cost and transfers of finance receivables and loans from held-for-investment to held-for-sale. Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Consumer automotive $ 704 $ 1,562 $ 704 $ 1,562 Consumer mortgage 2 — 75 40 Commercial 1 — 1 — Total sales and transfers $ 707 $ 1,562 $ 780 $ 1,602
Schedule of Purchases of Financing Receivables and Loans [Table Text Block]	The following table presents information about significant purchases of finance receivables and loans. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Consumer automotive $ 272 $ — $ 272 $ — Consumer mortgage 990 83 3,640 98 Total purchases of finance receivables and loans $ 1,262 $ 83 $ 3,912 $ 98
Past Due Financing Receivables [Table Text Block]	The following table presents an analysis of our past due finance receivables and loans, net, recorded at historical cost reported at carrying value before allowance for loan losses. ( $ in millions ) 30-59 days 60-89 days 90 days Total Current Total finance September 30, 2015 Consumer automotive $ 1,439 $ 310 $ 180 $ 1,929 $ 61,681 $ 63,610 Consumer mortgage 101 19 88 208 9,561 9,769 Commercial Commercial and industrial Automotive — — 6 6 29,014 29,020 Other — — — — 2,289 2,289 Commercial real estate — Automotive — — — — 3,302 3,302 Total commercial — — 6 6 34,605 34,611 Total consumer and commercial $ 1,540 $ 329 $ 274 $ 2,143 $ 105,847 $ 107,990 December 31, 2014 Consumer automotive $ 1,340 $ 293 $ 164 $ 1,797 $ 54,773 $ 56,570 Consumer mortgage 76 25 124 225 7,248 7,473 Commercial Commercial and industrial Automotive — 9 — 9 30,862 30,871 Other — — — — 1,882 1,882 Commercial real estate — Automotive — — — — 3,151 3,151 Total commercial — 9 — 9 35,895 35,904 Total consumer and commercial $ 1,416 $ 327 $ 288 $ 2,031 $ 97,916 $ 99,947
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	The following table presents the carrying value before allowance for loan losses of our finance receivables and loans recorded at historical cost on nonaccrual status. ( $ in millions ) September 30, 2015 December 31, 2014 Consumer automotive $ 413 $ 386 Consumer mortgage 149 177 Commercial Commercial and industrial Automotive 26 32 Other 45 46 Commercial real estate — Automotive 4 4 Total commercial 75 82 Total consumer and commercial finance receivables and loans $ 637 $ 645
Financing Receivable Credit Quality Indicators [Table Text Block]	The following table presents performing and nonperforming credit quality indicators in accordance with our internal accounting policies for our consumer finance receivables and loans recorded at historical cost reported at carrying value before allowance for loan losses. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is determined not to be probable. Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information. September 30, 2015 December 31, 2014 ( $ in millions ) Performing Nonperforming Total Performing Nonperforming Total Consumer automotive $ 63,197 $ 413 $ 63,610 $ 56,184 $ 386 $ 56,570 Consumer mortgage 9,620 149 9,769 7,296 177 7,473 The following table presents pass and criticized credit quality indicators based on regulatory definitions for our commercial finance receivables and loans recorded at historical cost reported at carrying value before allowance for loan losses. September 30, 2015 December 31, 2014 ( $ in millions ) Pass Criticized (a) Total Pass Criticized (a) Total Commercial Commercial and industrial Automotive $ 27,423 $ 1,597 $ 29,020 $ 29,150 $ 1,721 $ 30,871 Other 1,856 433 2,289 1,509 373 1,882 Commercial real estate — Automotive 3,156 146 3,302 3,015 136 3,151 Total commercial $ 32,435 $ 2,176 $ 34,611 $ 33,674 $ 2,230 $ 35,904 (a) Includes loans classified as special mention, substandard, or doubtful. These classifications are based on regulatory definitions and generally represent loans within our portfolio that have a higher default risk or have already defaulted.
Impaired Financing Receivables [Table Text Block]	The following table presents information about our impaired finance receivables and loans recorded at historical cost. ( $ in millions ) Unpaid principal balance Carrying value before allowance Impaired with no allowance Impaired with an allowance Allowance for impaired loans September 30, 2015 Consumer automotive $ 285 $ 285 $ — $ 285 $ 22 Consumer mortgage 271 268 63 205 48 Commercial Commercial and industrial Automotive 26 26 9 17 4 Other 45 45 — 45 15 Commercial real estate — Automotive 4 4 4 — — Total commercial 75 75 13 62 19 Total consumer and commercial finance receivables and loans $ 631 $ 628 $ 76 $ 552 $ 89 December 31, 2014 Consumer automotive $ 282 $ 282 $ — $ 282 $ 23 Consumer mortgage 340 336 86 250 62 Commercial Commercial and industrial Automotive 32 32 4 28 5 Other 46 46 — 46 15 Commercial real estate — Automotive 4 4 1 3 1 Total commercial 82 82 5 77 21 Total consumer and commercial finance receivables and loans $ 704 $ 700 $ 91 $ 609 $ 106 The following tables present average balance and interest income for our impaired finance receivables and loans. 2015 2014 Three months ended September 30, ( $ in millions ) Average Interest Average Interest Consumer automotive $ 288 $ 4 $ 297 $ 5 Consumer mortgage 268 3 914 7 Commercial Commercial and industrial Automotive 36 — 32 — Other 45 — 51 — Commercial real estate — Automotive 6 — 3 — Total commercial 87 — 86 — Total consumer and commercial finance receivables and loans $ 643 $ 7 $ 1,297 $ 12 2015 2014 Nine months ended September 30, ($ in millions) Average Interest Average Interest Consumer automotive $ 291 $ 13 $ 298 $ 14 Consumer mortgage 283 7 923 22 Commercial Commercial and industrial Automotive 35 1 68 1 Other 39 3 62 4 Commercial real estate — Automotive 5 — 7 — Total commercial 79 4 137 5 Total consumer and commercial finance receivables and loans $ 653 $ 24 $ 1,358 $ 41
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	The following tables present information related to finance receivables and loans recorded at historical cost modified in connection with a TDR during the period. 2015 2014 Three months ended September 30, ( $ in millions ) Number of Pre-modification Post-modification Number of Pre-modification Post-modification Consumer automotive 4,612 $ 75 $ 66 4,361 $ 72 $ 63 Consumer mortgage 53 13 13 37 7 6 Commercial Commercial and industrial Automotive — — — — — — Other 1 21 21 — — — Commercial real estate — Automotive 1 3 3 — — — Total commercial 2 24 24 — — — Total consumer and commercial finance receivables and loans 4,667 $ 112 $ 103 4,398 $ 79 $ 69 2015 2014 Nine months ended September 30, ( $ in millions) Number of Pre-modification Post-modification Number of Pre-modification Post-modification Consumer automotive 12,763 $ 202 $ 173 13,681 $ 223 $ 193 Consumer mortgage 169 42 40 350 71 66 Commercial Commercial and industrial Automotive — — — 3 23 23 Other 1 21 21 3 48 48 Commercial real estate — Automotive 1 3 3 — — — Total commercial 2 24 24 6 71 71 Total consumer and commercial finance receivables and loans 12,934 $ 268 $ 237 14,037 $ 365 $ 330
Finance receivables and loans redefaulted during the period [Table Text Block]	The following tables present information about finance receivables and loans recorded at historical cost that have redefaulted during the reporting period and were within 12 months or less of being modified as a TDR. Redefault is when finance receivables and loans meet the requirements for evaluation under our charge-off policy (Refer to Note 1 to the Consolidated Financial Statements in our 2014 Annual Report on Form 10-K for additional information) except for commercial finance receivables and loans, where redefault is defined as 90 days past due. 2015 2014 Three months ended September 30, ( $ in millions ) Number of Carrying value Charge-off amount Number of Carrying value Charge-off amount Consumer automotive 1,742 $ 21 $ 12 1,790 $ 22 $ 12 Consumer mortgage 2 1 — 5 1 — Commercial — — — — — — Total consumer and commercial finance receivables and loans 1,744 $ 22 $ 12 1,795 $ 23 $ 12 2015 2014 Nine months ended September 30, ( $ in millions ) Number of Carrying value Charge-off amount Number of Carrying value Charge-off amount Consumer automotive 4,822 $ 58 $ 33 5,020 $ 62 $ 33 Consumer mortgage 9 1 — 10 2 — Commercial — — — — — — Total consumer and commercial finance receivables and loans 4,831 $ 59 $ 33 5,030 $ 64 $ 33

Investment In Operating Lease42

Investment In Operating Leases, Net (Tables)	9 Months Ended
	Sep. 30, 2015
Leases, Operating [Abstract]
Schedule of Property Subject to or Available for Operating Lease [Table Text Block]	Investments in operating leases were as follows. ($ in millions) September 30, 2015 December 31, 2014 Vehicles $ 21,270 $ 23,144 Accumulated depreciation (3,978 ) (3,634 ) Investment in operating leases, net $ 17,292 $ 19,510
Depreciation Expense On Operating Lease Assets [Table Text Block]	Depreciation expense on operating lease assets includes remarketing gains and losses recognized on the sale of operating lease assets. The following summarizes the components of depreciation expense on operating lease assets. Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 Depreciation expense on operating lease assets (excluding remarketing gains) $ 633 $ 654 $ 1,995 $ 1,982 Remarketing gains (105 ) (105 ) (282 ) (382 ) Depreciation expense on operating lease assets $ 528 $ 549 $ 1,713 $ 1,600

Securitizations And Variable 43

Securitizations And Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2015
Securitizations And Variable Interest Entities [Abstract]
Schedule of Variable Interest Entities [Table Text Block]	Our involvement with consolidated and nonconsolidated VIEs in which we hold variable interests is presented below. ($ in millions) Consolidated Assets of Maximum exposure to September 30, 2015 On-balance sheet variable interest entities Consumer automotive $ 29,429 (b) Commercial automotive 15,118 Off-balance sheet variable interest entities Consumer automotive — $ 2,870 $ 2,870 (c) Commercial other 197 (d) — (e) 445 (f) Total $ 44,744 $ 2,870 $ 3,315 December 31, 2014 On-balance sheet variable interest entities Consumer automotive $ 31,994 (b) Commercial automotive 18,171 Off-balance sheet variable interest entities Consumer automotive — $ 2,801 $ 2,801 (c) Commercial other 146 (d) — (e) 362 (f) Total $ 50,311 $ 2,801 $ 3,163 (a) Asset values represent the current unpaid principal balance of outstanding consumer finance receivables and loans within the VIEs. (b) Includes $10.2 billion and $12.7 billion of assets that are not encumbered by VIE beneficial interests held by third parties at September 30, 2015 , and December 31, 2014 , respectively. Ally or consolidated affiliates hold the interests in these assets which eliminate in consolidation. (c) Maximum exposure to loss represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions. This measure is based on the unlikely event that all of the loans have underwriting defects or other defects that trigger a representation and warranty provision and the collateral supporting the loans are worthless. This required disclosure is not an indication of our expected loss. (d) Includes $211 million and $164 million classified as other assets, offset by $14 million and $18 million classified as accrued expenses and other liabilities at September 30, 2015 , and December 31, 2014 , respectively. (e) Includes VIEs for which we have no management oversight and therefore we are not able to provide the total assets of the VIEs. (f) For certain nonconsolidated affordable housing entities, maximum exposure to loss represents the yield we guaranteed investors through long term guarantee contracts. The amount disclosed is based on the unlikely event that the underlying properties cease generating yield to investors and the yield delivered to investors in the form of low income tax housing credits is recaptured. For nonconsolidated equity investments, maximum exposure to loss represents our outstanding investment, additional committed capital, and low income housing tax credits subject to recapture. The amount disclosed is based on the unlikely event that our committed capital is funded, our investments become worthless, and the tax credits previously delivered to us are recaptured. This required disclosure is not an indication of our expected loss.
Schedule Of Cash Flow Received And Paid To Nonconsolidated Securitization Entities [Table Text Block]	The following table summarizes cash flows received and paid related to securitization entities and asset-backed financings where the transfer is accounted for as a sale and we have a continuing involvement with the transferred assets (e.g., servicing) that were outstanding during the nine months ended September 30, 2015 , and 2014 . Additionally, this table contains information regarding cash flows received from and paid to nonconsolidated securitization entities that existed during each period. Nine months ended September 30, ( $ in millions ) Consumer automotive Consumer mortgage 2015 Cash proceeds from transfers completed during the period $ 1,044 $ — Servicing fees 21 — 2014 Cash proceeds from transfers completed during the period $ 1,557 $ — Servicing fees 6 — Representations and warranties obligations — (9 )
Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together [Table Text Block]	The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses. Total Amount Amount 60 days or more past due ($ in millions) September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 On-balance sheet loans Consumer automotive $ 63,610 $ 58,085 $ 490 $ 457 Consumer mortgage 9,770 7,926 107 151 Commercial automotive 32,322 34,022 6 9 Commercial other 2,326 1,918 — — Total on-balance sheet loans 108,028 101,951 603 617 Off-balance sheet securitization entities Consumer automotive 2,870 2,801 8 5 Total off-balance sheet securitization entities 2,870 2,801 8 5 Whole-loan transactions (a) 2,030 929 15 33 Total $ 112,928 $ 105,681 $ 626 $ 655 (a) Whole-loan transactions are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors. Net credit losses Three months ended September 30, Nine months ended September 30, ($ in millions) 2015 2014 2015 2014 On-balance sheet loans Consumer automotive $ 156 $ 137 $ 384 $ 341 Consumer mortgage 6 12 29 32 Commercial automotive — — — 1 Commercial other (1 ) — (2 ) (7 ) Total on-balance sheet loans 161 149 411 367 Off-balance sheet securitization entities Consumer automotive 1 — 3 1 Total off-balance sheet securitization entities 1 — 3 1 Whole-loan transactions — 1 — 5 Total $ 162 $ 150 $ 414 $ 373

Servicing Activities (Tables)

Servicing Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Servicing Activities [Abstract]
Schedule Of Total Serviced Automobile Loans Outstanding [Table Text Block]	The current unpaid principal balance and any related unamortized deferred fees and costs of total serviced automotive finance loans and leases outstanding were as follows. ($ in millions) September 30, 2015 December 31, 2014 On-balance sheet automotive finance loans and leases Consumer automotive $ 63,352 $ 58,085 Commercial automotive 32,322 34,022 Operating leases 16,955 19,510 Other 61 55 Off-balance sheet automotive finance loans Loans sold to third-party investors Securitizations 2,901 2,832 Whole-loan 2,027 887 Total serviced automotive finance loans and leases $ 117,618 $ 115,391

Other Assets (Tables)

Other Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Other Assets [Abstract]
Schedule of Other Assets [Table Text Block]	The components of other assets were as follows. ($ in millions) September 30, 2015 December 31, 2014 Property and equipment at cost $ 648 $ 775 Accumulated depreciation (436 ) (550 ) Net property and equipment 212 225 Restricted cash collections for securitization trusts (a) 1,791 2,221 Net deferred tax assets 1,459 1,812 Nonmarketable equity securities 313 271 Fair value of derivative contracts in receivable position (b) 299 263 Cash reserve deposits held-for-securitization trusts (c) 255 303 Unamortized debt issuance costs 230 238 Other accounts receivable 196 298 Collateral placed with counterparties 72 236 Other assets 1,197 1,435 Total other assets $ 6,024 $ 7,302 (a) Represents cash collections from customer payments on securitized receivables. These funds are distributed to investors as payments on the related secured debt. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . (c) Represents credit enhancement in the form of cash reserves for various securitization transactions.

Deposit Liabilities (Tables)

Deposit Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Deposits [Abstract]
Schedule of Deposit Liabilities [Table Text Block]	Deposit liabilities consisted of the following. ( $ in millions ) September 30, 2015 December 31, 2014 Noninterest-bearing deposits $ 91 $ 64 Interest-bearing deposits Savings and money market checking accounts 33,839 26,769 Certificates of deposit 29,864 31,070 Dealer deposits 247 319 Total deposit liabilities $ 64,041 $ 58,222

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2015
Short-term Debt [Abstract]
Schedule of Short-term Debt [Table Text Block]	The following table presents the composition of our short-term borrowings portfolio. September 30, 2015 December 31, 2014 ($ in millions) Unsecured Secured (a) Total Unsecured Secured (a) Total Demand notes $ 3,374 $ — $ 3,374 $ 3,338 $ — $ 3,338 Federal Home Loan Bank — 400 400 — 2,950 2,950 Securities sold under agreements to repurchase — 1,520 1,520 — 774 774 Other 84 — 84 — — — Total short-term borrowings $ 3,458 $ 1,920 $ 5,378 $ 3,338 $ 3,724 $ 7,062 (a) Refer to Note 14 for further details on assets restricted as collateral for payment of the related debt.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2015
Long-term Debt, Unclassified [Abstract]
Long-term Debt Portfolio [Table Text Block]	The following table presents the composition of our long-term debt portfolio. September 30, 2015 December 31, 2014 ($ in millions) Unsecured Secured Total Unsecured Secured Total Long-term debt Due within one year $ 1,848 $ 11,565 $ 13,413 $ 4,809 $ 12,629 $ 17,438 Due after one year (a) 17,407 36,196 53,603 17,154 31,514 48,668 Fair value adjustment (b) 445 — 445 452 — 452 Total long-term debt (c) $ 19,700 $ 47,761 $ 67,461 $ 22,415 $ 44,143 $ 66,558 (a) Includes $2.6 billion of trust preferred securities at both September 30, 2015 , and December 31, 2014 . (b) Represents the fair value adjustment associated with the application of hedge accounting on certain of our long-term unsecured debt positions. Refer to Note 20 for additional information. (c) Includes advances from the Federal Home Loan Bank of Pittsburgh (FHLB) of $6.4 billion and $2.8 billion at September 30, 2015 , and December 31, 2014 , respectively.
Scheduled Remaining Maturity of Long-term Debt [Table Text Block]	The following table presents the scheduled remaining maturity of long-term debt, assuming no early redemptions will occur. The actual payment of secured debt may vary based on the payment activity of the related pledged assets. Year ended December 31, ($ in millions) 2015 2016 2017 2018 2019 2020 and Fair value Total Unsecured Long-term debt $ 11 $ 1,934 $ 4,393 $ 2,951 $ 1,625 $ 9,741 $ 445 $ 21,100 Original issue discount (17 ) (74 ) (86 ) (97 ) (34 ) (1,092 ) — (1,400 ) Total unsecured (6 ) 1,860 4,307 2,854 1,591 8,649 445 19,700 Secured Long-term debt 3,731 10,150 14,403 8,913 5,521 5,043 — 47,761 Total long-term debt $ 3,725 $ 12,010 $ 18,710 $ 11,767 $ 7,112 $ 13,692 $ 445 $ 67,461
Pledged assets for the payment of the related secured borrowings and repurchase agreements [Table Text Block]	The following summarizes assets restricted as collateral for the payment of the related debt obligation primarily arising from securitization transactions accounted for as secured borrowings and repurchase agreements. September 30, 2015 December 31, 2014 ($ in millions) Total Ally Bank (a) Total Ally Bank (a) Investment securities (b) $ 1,591 $ — $ 786 $ 786 Mortgage assets held-for-investment and lending receivables 9,746 9,746 7,541 7,541 Consumer automotive finance receivables 34,186 9,491 33,438 11,263 Commercial automotive finance receivables 18,122 17,681 20,605 20,083 Investment in operating leases, net 6,810 3,947 6,820 4,672 Total assets restricted as collateral (c) (d) $ 70,455 $ 40,865 $ 69,190 $ 44,345 Secured debt (e) $ 49,681 $ 23,686 $ 47,867 $ 27,134 (a) Ally Bank is a component of the total column. (b) The investment securities are restricted under repurchase agreements. Refer to Note 13 for information on the repurchase agreements. (c) Ally Bank has an advance agreement with the FHLB, and had assets pledged to secure borrowings that were restricted as collateral to the FHLB totaling $13.0 billion and $10.7 billion at September 30, 2015 , and December 31, 2014 , respectively. These assets were composed primarily of consumer mortgage finance receivables and loans, net. Ally Bank has access to the Federal Reserve Bank Discount Window. Ally Bank had assets pledged and restricted as collateral to the Federal Reserve Bank totaling $3.0 billion and $3.2 billion at September 30, 2015 , and December 31, 2014 , respectively. These assets were composed of consumer automotive finance receivables and loans, net and investment in operating leases, net. Availability under these programs is only for the operations of Ally Bank and cannot be used to fund the operations or liabilities of Ally or its subsidiaries. (d) Excludes restricted cash and cash reserves for securitization trusts recorded within other assets on the Condensed Consolidated Balance Sheet . Refer to Note 11 for additional information. (e) Includes $1.9 billion and $3.7 billion of short-term borrowings at September 30, 2015 , and December 31, 2014 , respectively.
Schedule Of Committed Funding Facilities [Table Text Block]	Outstanding Unused capacity (a) Total capacity ($ in millions) September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Bank funding Secured $ 3,015 $ 3,250 $ 235 $ 250 $ 3,250 $ 3,500 Parent funding Secured 17,154 15,030 1,256 3,425 18,410 18,455 Total committed facilities $ 20,169 $ 18,280 $ 1,491 $ 3,675 $ 21,660 $ 21,955 (a) F unding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

Accrued Expenses and Other Li49

Accrued Expenses and Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Schedule of Accrued Liabilities [Table Text Block]	The components of accrued expenses and other liabilities were as follows. ($ in millions) September 30, 2015 December 31, 2014 Accounts payable $ 487 $ 298 Employee compensation and benefits 236 298 Reserves for insurance losses and loss adjustment expenses 182 208 Fair value of derivative contracts in payable position (a) 176 252 Deferred revenue 126 151 Other liabilities 544 528 Total accrued expenses and other liabilities $ 1,751 $ 1,735 (a) For additional information on derivative instruments and hedging activities, refer to Note 20 .

Preferred Stock (Tables)

Preferred Stock (Tables)	9 Months Ended
	Sep. 30, 2015
Preferred Stock, Including Additional Paid in Capital [Abstract]
Schedule of Stock by Class [Table Text Block]	The following table summarizes information about our Series A and Series G preferred stock. September 30, 2015 December 31, 2014 Series A preferred stock (a) Carrying value ($ in millions) $ 696 $ 1,021 Par value (per share) 0.01 0.01 Liquidation preference (per share) 25 25 Number of shares authorized 40,870,560 40,870,560 Number of shares issued and outstanding 27,870,560 40,870,560 Dividend/coupon Prior to May 15, 2016 8.5 % 8.5 % On and after May 15, 2016 Three month Three month Series G preferred stock Carrying value ($ in millions) $ 117 $ 234 Par value (per share) 0.01 0.01 Liquidation preference (per share) 1,000 1,000 Number of shares authorized 2,576,601 2,576,601 Number of shares issued and outstanding 1,288,301 2,576,601 Dividend/coupon 7 % 7 % (a) Nonredeemable prior to May 15, 2016.

Accumulated Other Comprehensi51

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income. ($ in millions) Unrealized losses on investment securities (a) Translation adjustments and net investment hedges (b) Cash flow hedges Defined benefit pension plans Accumulated other comprehensive loss Balance at December 31, 2013 $ (269 ) $ 65 $ 5 $ (77 ) $ (276 ) 2014 net change 148 (27 ) 1 4 126 Balance at September 30, 2014 $ (121 ) $ 38 $ 6 $ (73 ) $ (150 ) Balance at December 31, 2014 $ (21 ) $ 36 $ 7 $ (88 ) $ (66 ) 2015 net change (35 ) (21 ) — — (56 ) Balance at September 30, 2015 $ (56 ) $ 15 $ 7 $ (88 ) $ (122 ) (a) Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 .
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	The following tables present the before- and after-tax changes in each component of accumulated other comprehensive (loss) income. Three months ended September 30, 2015 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 106 $ (41 ) $ 65 Less: Net realized gains reclassified to income from continuing operations 6 (a) (3 ) (b) 3 Net change 100 (38 ) 62 Translation adjustments Net unrealized losses arising during the period (17 ) 5 (12 ) Less: Net realized losses reclassified to income from discontinued operations, net of tax (1 ) — (1 ) Net change (16 ) 5 (11 ) Net investment hedges Net unrealized gains arising during the period 15 (5 ) 10 Other comprehensive income $ 99 $ (38 ) $ 61 (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Three months ended September 30, 2014 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized losses arising during the period $ (15 ) $ 5 $ (10 ) Less: Net realized gains reclassified to income from continuing operations 45 (a) (1 ) (b) 44 Net change (60 ) 6 (54 ) Translation adjustments Net unrealized losses arising during the period (11 ) 4 (7 ) Net investment hedges Net unrealized gains arising during the period 8 (3 ) 5 Cash flow hedges Net unrealized gains arising during the period 1 — 1 Other comprehensive loss $ (62 ) $ 7 $ (55 ) (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Nine months ended September 30, 2015 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 53 $ (21 ) $ 32 Less: Net realized gains reclassified to income from continuing operations 106 (a) (39 ) (b) 67 Net change (53 ) 18 (35 ) Translation adjustments Net unrealized losses arising during the period (33 ) 11 (22 ) Less: Net realized gains reclassified to income from discontinued operations, net of tax 42 (20 ) 22 Net change (75 ) 31 (44 ) Net investment hedges Net unrealized gains arising during the period 31 (11 ) 20 Less: Net realized losses reclassified to income from discontinued operations, net of tax (4 ) 1 (3 ) Net change 35 (12 ) 23 Other comprehensive loss $ (93 ) $ 37 $ (56 ) (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . Nine months ended September 30, 2014 ($ in millions) Before Tax Tax Effect After Tax Investment securities Net unrealized gains arising during the period $ 358 $ (89 ) $ 269 Less: Net realized gains reclassified to income from continuing operations 129 (a) (8 ) (b) 121 Net change 229 (81 ) 148 Translation adjustments Net unrealized losses arising during the period (21 ) 8 (13 ) Less: Net realized gains reclassified to income from discontinued operations, net of tax 23 (3 ) 20 Net change (44 ) 11 (33 ) Net investment hedges Net unrealized gains arising during the period 10 (4 ) 6 Cash flow hedges Net unrealized gains arising during the period 1 — 1 Defined benefit pension plans Less: Net losses reclassified to income from continuing operations (7 ) (c) 3 (b) (4 ) Other comprehensive income $ 203 $ (77 ) $ 126 (a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income . (b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income . (c) Includes losses reclassified to compensation and benefits expense in our Condensed Consolidated Statement of Comprehensive Income .

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table presents the calculation of basic and diluted earnings per common share. Three months ended September 30, Nine months ended September 30, ( $ in millions, except share data ) (a) 2015 2014 2015 2014 Net income from continuing operations $ 273 $ 293 $ 621 $ 774 Preferred stock dividends (b) (38 ) (67 ) (1,356 ) (200 ) Net income (loss) from continuing operations attributable to common shareholders 235 226 (735 ) 574 (Loss) income from discontinued operations, net of tax (5 ) 130 405 199 Net income (loss) attributable to common shareholders $ 230 $ 356 $ (330 ) $ 773 Basic weighted-average common shares outstanding (c) 483,073,329 481,611,138 482,725,342 480,916,395 Diluted weighted-average common shares outstanding (c) (d) 484,399,091 482,506,091 482,725,342 481,545,506 Basic earnings per common share Net income (loss) from continuing operations $ 0.49 $ 0.47 $ (1.52 ) $ 1.19 (Loss) income from discontinued operations, net of tax (0.01 ) 0.27 0.84 0.41 Net income (loss) $ 0.48 $ 0.74 $ (0.68 ) $ 1.60 Diluted earnings per common share Net income (loss) from continuing operations $ 0.49 $ 0.47 $ (1.52 ) $ 1.19 (Loss) income from discontinued operations, net of tax (0.01 ) 0.27 0.84 0.41 Net income (loss) $ 0.47 $ 0.74 $ (0.68 ) $ 1.60 (a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers. (b) Preferred stock dividends for the nine months ended September 30, 2015 , include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized. Refer to Note 16 for additional preferred stock information. (c) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months ended September 30, 2015 , and 2014 , respectively. (d) Due to antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months ended September 30, 2015 , basic weighted-average common shares outstanding were used to calculate basic and diluted earnings per share.

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
	Sep. 30, 2015
Regulatory Capital Requirements [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	The following table summarizes our capital ratios under the U.S. Basel III capital framework. Under Basel III Under Basel I September 30, 2015 (a) December 31, 2014 (b) Required Well-capitalized ( $ in millions ) Amount Ratio Amount Ratio Risk-based capital Common Equity Tier 1 (to risk-weighted assets) (c) Ally Financial Inc. $ 13,444 10.05 % $ 12,588 9.64 % 4.50 % (d) Ally Bank 16,311 17.50 16,022 16.89 4.50 6.50 % Tier 1 (to risk-weighted assets) Ally Financial Inc. $ 16,087 12.02 % $ 16,389 12.55 % 6.00 % 6.00 % Ally Bank 16,311 17.50 16,022 16.89 6.00 8.00 Total (to risk-weighted assets) Ally Financial Inc. $ 17,327 12.95 % $ 17,294 13.24 % 8.00 % 10.00 % Ally Bank 16,739 17.96 16,468 17.36 8.00 10.00 Tier 1 leverage (to adjusted quarterly average assets) (e) Ally Financial Inc. $ 16,087 10.43 % $ 16,389 10.94 % 4.00 % (d) Ally Bank 16,311 15.35 16,022 15.44 15.00 (f) 5.00 % (a) U.S. Basel III became effective for us on January 1, 2015, subject to transitional provisions primarily related to deductions and adjustments impacting Common Equity Tier 1 capital and Tier 1 capital. (b) Capital ratios as of December 31, 2014 are presented under the U.S. Basel I capital framework. (c) Previously referred to as Tier 1 Common Equity under the U.S. Basel I capital framework. (d) Currently, there is no ratio component for determining whether a BHC is "well-capitalized." (e) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology. (f) Ally Bank, in accordance with the CLMA, is required to maintain a Tier 1 leverage ratio of at least 15% .

Derivative Instruments and He54

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value Amounts of Derivative Instruments Reported On Our Condensed Consolidated Balance Sheet [Table Text Block]	The following table summarizes the fair value amounts of derivative instruments reported on our Condensed Consolidated Balance Sheet . The fair value amounts are presented on a gross basis, are segregated by derivatives that are designated and qualifying as hedging instruments or those that are not, and are further segregated by type of contract within those two categories. Notional amounts are reference amounts from which contractual obligations are derived and are not recorded on the balance sheet. In our view, derivative notional is not an accurate measure of our derivative exposure when viewed in isolation from other factors, such as market rate fluctuations and counterparty credit risk. September 30, 2015 December 31, 2014 Derivative contracts in a Notional Derivative contracts in a Notional ( $ in millions ) receivable payable receivable position (a) payable Derivatives qualifying for hedge accounting Interest rate contracts Swaps (c) (d) $ 182 $ 33 $ 17,204 $ 118 $ 7 $ 18,554 Foreign exchange contracts Forwards 2 — 233 — — 210 Total derivatives qualifying for hedge accounting 184 33 17,437 118 7 18,764 Economic hedges Interest rate contracts Swaps 50 71 6,353 40 65 11,979 Futures and forwards 5 4 7,850 4 2 18,886 Written options — 56 18,007 — 94 14,823 Purchased options 55 — 18,086 94 — 15,159 Total interest rate risk 110 131 50,296 138 161 60,847 Foreign exchange contracts Swaps — — — — 74 1,210 Futures and forwards 1 1 161 5 4 304 Total foreign exchange risk 1 1 161 5 78 1,514 Equity contracts Forwards — 8 47 — 3 74 Written options — 3 1 — 3 1 Purchased options 4 — — 2 — — Total equity risk 4 11 48 2 6 75 Total economic hedges 115 143 50,505 145 245 62,436 Total derivatives $ 299 $ 176 $ 67,942 $ 263 $ 252 $ 81,200 (a) Derivative contracts in a receivable position are classified as other assets on the Condensed Consolidated Balance Sheet , and includes accrued interest of $34 million and $50 million at September 30, 2015 , and December 31, 2014 , respectively. (b) Derivative contracts in a liability position are classified as accrued expenses and other liabilities on the Condensed Consolidated Balance Sheet , and includes accrued interest of $9 million and $17 million at September 30, 2015 , and December 31, 2014 , respectively. (c) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate debt obligations with $182 million and $97 million in a receivable position, $0 million and $1 million in a payable position, and a $5.7 billion and $4.7 billion notional amount at September 30, 2015 , and December 31, 2014 , respectively. Of the hedge notional amount at September 30, 2015 , $2.2 billion is associated with debt maturing in five or more years. (d) Other fair value hedges include pay-fixed swaps on portfolios of held-for-investment automotive loan assets with $0 million and $21 million in a receivable position, $33 million and $6 million in a payable position, and an $11.5 billion and $13.9 billion notional amount at September 30, 2015 , and December 31, 2014 , respectively.
Gains and Losses On Derivative Instruments Reported in Statement of Comprehensive Income [Table Text Block]	The following table summarizes the location and amounts of gains and losses on derivative instruments reported in our Condensed Consolidated Statement of Comprehensive Income . Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Derivatives qualifying for hedge accounting (Loss) gain recognized in earnings on derivatives Interest rate contracts Interest and fees on finance receivables and loans (a) $ (34 ) $ 28 $ (50 ) $ 22 Interest on long-term debt (b) 132 (39 ) 121 102 Gain (loss) recognized in earnings on hedged items Interest rate contracts Interest and fees on finance receivables and loans (c) 38 (15 ) 73 14 Interest on long-term debt (d) (135 ) 49 (128 ) (90 ) Total derivatives qualifying for hedge accounting 1 23 16 48 Economic derivatives (Loss) gain recognized in earnings on derivatives Interest rate contracts Loss on mortgage and automotive loans, net (2 ) — (2 ) — Other income, net of losses — (5 ) (9 ) (24 ) Total interest rate contracts (2 ) (5 ) (11 ) (24 ) Foreign exchange contracts (e) Interest on long-term debt (1 ) (108 ) (139 ) (117 ) Other income, net of losses 1 8 9 8 Total foreign exchange contracts — (100 ) (130 ) (109 ) Equity contracts Compensation and benefits expense (4 ) (6 ) (7 ) (6 ) Total equity contracts (4 ) (6 ) (7 ) (6 ) Loss recognized in earnings on derivatives $ (5 ) $ (88 ) $ (132 ) $ (91 ) (a) Amounts exclude losses related to interest for qualifying accounting hedges of retail automotive loans held-for-investment, which are primarily offset by the fixed coupon payments of the loans. The losses were $18 million and $16 million for the three months ended September 30, 2015 , and 2014 , respectively, and $50 million and $43 million for the nine months ended September 30, 2015 , and 2014 , respectively. (b) Amounts exclude gains related to interest for qualifying accounting hedges of debt, which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $24 million and $27 million for the three months ended September 30, 2015 , and 2014 , respectively, and $71 million and $89 million for the nine months ended September 30, 2015 , and 2014 , respectively. (c) Amounts exclude losses related to amortization of deferred loan basis adjustments on the de-designated hedged item of $1 million for the three months ended September 30, 2015, and $1 million for the nine months ended September 30, 2015. (d) Amounts exclude gains related to amortization of deferred basis adjustments on the de-designated hedged item of $14 million and $38 million for the three months ended September 30, 2015 , and 2014 , respectively, and $59 million and $120 million for the nine months ended September 30, 2015 , and 2014 , respectively. (e) Amounts exclude gains related to the revaluation of the related foreign-denominated debt or receivable of $1 million and $102 million for the three months ended September 30, 2015 , and 2014 , respectively, and $134 million and $112 million for the nine months ended September 30, 2015 , and 2014 , respectively.
Derivative Instruments Used in Cash Flow and Net Investment Hedge Accounting Relationships [Table Text Block]	The following table summarizes derivative instruments used in cash flow and net investment hedge accounting relationships. Three months ended September 30, Nine months ended September 30, ( $ in millions ) 2015 2014 2015 2014 Cash flow hedges Interest rate contracts Loss reclassified from accumulated other comprehensive income to interest on long-term debt $ — $ (1 ) $ — $ (1 ) Total interest on long-term debt $ — $ (1 ) $ — $ (1 ) Gain recognized in other comprehensive income $ — $ 1 $ — $ 1 Net investment hedges Foreign exchange contracts Loss reclassified from accumulated other comprehensive loss to income from discontinued operations, net $ — $ — $ (4 ) $ — Total loss from discontinued operations, net $ — $ — $ (4 ) $ — Gain recognized in other comprehensive income (a) $ 15 $ 8 $ 35 $ 10 (a) The amounts represent the effective portion of net investment hedges. There are offsetting amounts recognized in accumulated other comprehensive income related to the revaluation of the related net investment in foreign operations, including the tax impacts of the hedge and related net investment, as disclosed separately in Note 17 . There were losses of $16 million and losses of $10 million for the three months ended September 30, 2015 , and 2014 , respectively. There were losses of $56 million and $37 million for the nine months ended September 30, 2015 , and 2014 , respectively.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements - Recurring Basis [Table Text Block]	The following tables display the assets and liabilities measured at fair value on a recurring basis including financial instruments elected for the fair value option. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The tables below display the hedges separately from the hedged items; therefore, they do not directly display the impact of our risk management activities. Recurring fair value measurements September 30, 2015 ($ in millions) Level 1 Level 2 Level 3 Total Assets Investment securities Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 1,114 $ 695 $ — $ 1,809 U.S. State and political subdivisions — 651 — 651 Foreign government 10 174 — 184 Mortgage-backed residential — 11,614 — 11,614 Mortgage-backed commercial — 517 — 517 Asset-backed — 1,951 — 1,951 Corporate debt securities — 1,047 — 1,047 Total debt securities 1,124 16,649 — 17,773 Equity securities (a) 985 — — 985 Total available-for-sale securities 2,109 16,649 — 18,758 Other assets Interests retained in financial asset sales — — 29 29 Derivative contracts in a receivable position (b) Interest rate 5 287 — 292 Foreign currency — 3 — 3 Other 4 — — 4 Total derivative contracts in a receivable position 9 290 — 299 Total assets $ 2,118 $ 16,939 $ 29 $ 19,086 Liabilities Accrued expenses and other liabilities Derivative contracts in a payable position (b) Interest rate $ (4 ) $ (160 ) $ — $ (164 ) Foreign currency — (1 ) — (1 ) Other (3 ) (8 ) — (11 ) Total derivative contracts in a payable position (7 ) (169 ) — (176 ) Total liabilities $ (7 ) $ (169 ) $ — $ (176 ) (a) Our investment in any one industry did not exceed 13% . (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . Recurring fair value measurements December 31, 2014 ($ in millions) Level 1 Level 2 Level 3 Total Assets Investment securities Available-for-sale securities Debt securities U.S. Treasury and federal agencies $ 217 $ 961 $ — $ 1,178 U.S. State and political subdivisions — 406 — 406 Foreign government 14 218 — 232 Mortgage-backed residential — 10,425 — 10,425 Mortgage-backed commercial — 253 — 253 Asset-backed — 1,991 — 1,991 Corporate debt securities — 746 — 746 Total debt securities 231 15,000 — 15,231 Equity securities (a) 906 — — 906 Total available-for-sale securities 1,137 15,000 — 16,137 Mortgage loans held-for-sale, net (b) — — 3 3 Other assets Interests retained in financial asset sales — — 47 47 Derivative contracts in a receivable position (c) Interest rate 4 252 — 256 Foreign currency — 5 — 5 Other 2 — — 2 Total derivative contracts in a receivable position 6 257 — 263 Collateral placed with counterparties (d) — 15 — 15 Total assets $ 1,143 $ 15,272 $ 50 $ 16,465 Liabilities Accrued expenses and other liabilities Derivative contracts in a payable position (c) Interest rate $ (2 ) $ (166 ) $ — $ (168 ) Foreign currency — (78 ) — (78 ) Other (2 ) (4 ) — (6 ) Total derivative contracts in a payable position (4 ) (248 ) — (252 ) Total liabilities $ (4 ) $ (248 ) $ — $ (252 ) (a) Our investment in any one industry did not exceed 16% . (b) Carried at fair value due to fair value option elections. (c) For additional information on derivative instruments and hedging activities, refer to Note 20 . (d) Represents collateral in the form of investment securities. Cash collateral was excluded.
Fair Value Measurements - Reconciliation of Level 3 Assets and Liabilities [Table Text Block]	The following tables present the reconciliation for all Level 3 assets and liabilities measured at fair value on a recurring basis. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The Level 3 items presented below may be hedged by derivatives and other financial instruments that are classified as Level 1 or Level 2. Thus, the following tables do not fully reflect the impact of our risk management activities. Level 3 recurring fair value measurements Net realized/unrealized gains Fair value at September 30, 2015 Net unrealized gains included in earnings ($ in millions) Fair value at July 1, 2015 included in earnings included in OCI Purchases Sales Issuances Settlements Transfers out of Level 3 Assets Mortgage loans held-for-sale, net $ 4 $ — $ — $ — $ (4 ) $ — $ — $ — $ — $ — Other assets Interests retained in financial asset sales 32 1 (a) — — — 1 (5 ) — 29 — Total assets $ 36 $ 1 $ — $ — $ (4 ) $ 1 $ (5 ) $ — $ 29 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair value at July 1, 2014 Net realized/unrealized gains Purchases Sales Issuances Settlements Transfers out of Level 3 Fair value at September 30, 2014 Net unrealized gains included in earnings ($ in millions) included in earnings included in OCI Assets Other assets Interests retained in financial asset sales $ 74 $ 4 (a) $ — $ — $ — $ — $ (17 ) $ — $ 61 $ — Total assets $ 74 $ 4 $ — $ — $ — $ — $ (17 ) $ — $ 61 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair Value at Jan. 1, 2015 Net realized/unrealized Purchases Sales Issuances Settlements Transfers out of Level 3 Fair value at September 30, 2015 Net unrealized gains included in earnings still held at September 30, 2015 ($ in millions) included in earnings included in OCI Assets Mortgage loans held-for-sale, net $ 3 $ 1 $ — $ — $ (4 ) $ — $ — $ — $ — $ — Other assets Interests retained in financial asset sales 47 8 (a) — — — 2 (28 ) — 29 — Total assets $ 50 $ 9 $ — $ — $ (4 ) $ 2 $ (28 ) $ — $ 29 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income. Level 3 recurring fair value measurements Fair Value at Jan. 1, 2014 Net realized/unrealized Purchases Sales Issuances Settlements Transfers out of level 3 Fair value at September 30, 2014 Net unrealized gains included in earnings still held at September 30, 2014 ($ in millions) included in earnings included in OCI Assets Other assets Interests retained in financial asset sales $ 100 $ 9 (a) $ — $ — $ — $ — $ (48 ) $ — $ 61 $ — Derivative contracts, net (1 ) — — — — — (2 ) 3 — — Total assets $ 99 $ 9 $ — $ — $ — $ — $ (50 ) $ 3 $ 61 $ — (a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.
Fair Value Measurements - Nonrecurring Basis [Table Text Block]	The following tables display the assets and liabilities measured at fair value on a nonrecurring basis. Nonrecurring fair value measurements Lower-of-cost or fair value or valuation reserve allowance Total gain included in earnings for the three months ended Total gain included in earnings for the nine months ended September 30, 2015 ($ in millions) Level 1 Level 2 Level 3 Total Assets Loans held-for-sale, net Other $ — $ — $ 37 $ 37 $ — n/m (a) n/m (a) Total loans held-for-sale, net — — 37 37 — n/m (a) n/m (a) Commercial finance receivables and loans, net (b) Automotive — — 13 13 (4 ) n/m (a) n/m (a) Other — — 30 30 (15 ) n/m (a) n/m (a) Total commercial finance receivables and loans, net — — 43 43 (19 ) n/m (a) n/m (a) Other assets Repossessed and foreclosed assets (c) — — 9 9 (3 ) n/m (a) n/m (a) Other — — 2 2 — n/m (a) n/m (a) Total assets $ — $ — $ 91 $ 91 $ (22 ) n/m n/m n/m = not meaningful (a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance. (b) Represents the portion of the portfolio specifically impaired during 2015 . The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables. (c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value. Nonrecurring fair value measurements Lower-of-cost or fair value or valuation reserve allowance Total gain included in earnings for the three months ended Total gain included in earnings for the nine months ended September 30, 2014 ($ in millions) Level 1 Level 2 Level 3 Total Assets Commercial finance receivables and loans, net (a) Automotive $ — $ — $ 16 $ 16 $ (1 ) n/m (b) n/m (b) Other — — 37 37 (14 ) n/m (b) n/m (b) Total commercial finance receivables and loans, net — — 53 53 (15 ) n/m (b) n/m (b) Other assets Repossessed and foreclosed assets (c) — — 8 8 (3 ) n/m (b) n/m (b) Other — — 2 2 — $ — $ — Total assets $ — $ — $ 63 $ 63 $ (18 ) n/m n/m n/m = not meaningful (a) Represents the portion of the portfolio specifically impaired during 2014 . The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables. (b) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance. (c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.
Fair Value of Financial Intruments [Table Text Block]	The following table presents the carrying and estimated fair value of financial instruments, except for those recorded at fair value on a recurring basis presented in the previous section of this note titled Recurring Fair Value. When possible, we use quoted market prices to determine fair value. Where quoted market prices are not available, the fair value is internally derived based on appropriate valuation methodologies with respect to the amount and timing of future cash flows and estimated discount rates. However, considerable judgment is required in interpreting market data to develop estimates of fair value, so the estimates are not necessarily indicative of the amounts that could be realized or would be paid in a current market exchange. The effect of using different market assumptions or estimation methodologies could be material to the estimated fair values. Fair value information presented herein was based on information available at September 30, 2015 , and December 31, 2014 . Estimated fair value ($ in millions) Carrying value Level 1 Level 2 Level 3 Total September 30, 2015 Financial assets Loans held-for-sale, net $ 37 $ — $ — $ 37 $ 37 Finance receivables and loans, net 106,973 — — 107,846 107,846 Nonmarketable equity investments 313 — 287 43 330 Financial liabilities Deposit liabilities $ 64,041 $ — $ — $ 64,728 $ 64,728 Short-term borrowings 5,378 — — 5,378 5,378 Long-term debt 67,461 — 21,384 47,762 69,146 December 31, 2014 Financial assets Loans held-for-sale, net $ 2,003 $ — $ 485 $ 1,554 $ 2,039 Finance receivables and loans, net 98,971 — — 99,430 99,430 Nonmarketable equity investments 271 — 246 33 279 Financial liabilities Deposit liabilities $ 58,222 $ — $ — $ 58,777 $ 58,777 Short-term borrowings 7,062 — — 7,063 7,063 Long-term debt 66,558 — 25,224 44,084 69,308

Offsetting Assets and Liabili56

Offsetting Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Offsetting [Abstract]
Offsetting Assets and Liabilities [Table Text Block]	The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows. Gross Amounts of Recognized Assets/(Liabilities) Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets/(Liabilities) Presented in the Condensed Consolidated Balance Sheet Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet September 30, 2015 ( $ in millions ) Financial Instruments Collateral (a) (b) (c) Net Amount Assets Derivative assets in net asset positions $ 298 $ — $ 298 $ (114 ) $ (122 ) $ 62 Derivative assets in net liability positions 1 — 1 (1 ) — — Total assets (d) $ 299 $ — $ 299 $ (115 ) $ (122 ) $ 62 Liabilities Derivative liabilities in net liability positions $ (54 ) $ — $ (54 ) $ 1 $ 11 $ (42 ) Derivative liabilities in net asset positions (114 ) — (114 ) 114 — — Derivative liabilities with no offsetting arrangements (8 ) — (8 ) — — (8 ) Total derivative liabilities (d) (176 ) — (176 ) 115 11 (50 ) Securities sold under agreements to repurchase (e) (1,520 ) — (1,520 ) — 1,520 — Total liabilities $ (1,696 ) $ — $ (1,696 ) $ 115 $ 1,531 $ (50 ) (a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty. (b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and non-cash collateral received. $8 million of non-cash derivative collateral pledged to us was excluded at September 30, 2015 . We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met. (c) Certain agreements grant us the right to sell or pledge the non-cash assets we receive as collateral. Non-cash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $8 million at September 30, 2015 . We have not sold or pledged any of the non-cash collateral received under these agreements as of September 30, 2015 . (d) For additional information on derivative instruments and hedging activities, refer to Note 20 . (e) For additional information on securities sold under agreements to repurchase, refer to Note 13 . Gross Amounts of Recognized Assets/(Liabilities) Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets/(Liabilities) Presented in the Condensed Consolidated Balance Sheet Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet December 31, 2014 ( $ in millions ) Financial Instruments Collateral (a) Net Amount Assets Derivative assets in net asset positions $ 216 $ — $ 216 $ (60 ) $ (68 ) $ 88 Derivative assets in net liability positions 47 — 47 (47 ) — — Total assets (b) $ 263 $ — $ 263 $ (107 ) $ (68 ) $ 88 Liabilities Derivative liabilities in net liability positions $ (188 ) $ — $ (188 ) $ 47 $ 54 $ (87 ) Derivative liabilities in net asset positions (60 ) — (60 ) 60 — — Derivative liabilities with no offsetting arrangements (4 ) — (4 ) — — (4 ) Total derivative liabilities (b) (252 ) — (252 ) 107 54 (91 ) Securities sold under agreements to repurchase (c) (774 ) — (774 ) — 774 — Total liabilities $ (1,026 ) $ — $ (1,026 ) $ 107 $ 828 $ (91 ) (a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty. (b) For additional information on derivative instruments and hedging activities, refer to Note 20 . (c) For additional information on securities sold under agreements to repurchase, refer to Note 13

Segment And Geographic Inform57

Segment And Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Financial information for our reportable operating segments is summarized as follows. Three months ended September 30, ($ in millions) Automotive Finance operations Insurance operations Mortgage operations Corporate and Other (a) Consolidated (b) 2015 Net financing revenue $ 870 $ 16 $ 20 $ 64 $ 970 Other revenue 63 233 10 26 332 Total net revenue 933 249 30 90 1,302 Provision for loan losses 201 — 6 4 211 Total noninterest expense 385 209 17 63 674 Income from continuing operations before income tax expense $ 347 $ 40 $ 7 $ 23 $ 417 Total assets $ 113,843 $ 6,997 $ 9,772 $ 25,493 $ 156,105 2014 Net financing revenue $ 850 $ 16 $ 9 $ 14 $ 889 Other revenue 69 287 — 19 375 Total net revenue 919 303 9 33 1,264 Provision for loan losses 109 — (7 ) — 102 Total noninterest expense 395 243 19 85 742 Income (loss) from continuing operations before income tax expense $ 415 $ 60 $ (3 ) $ (52 ) $ 420 Total assets $ 110,937 $ 7,178 $ 7,402 $ 23,678 $ 149,195 (a) Total assets for Corporate Finance were $2.3 billion and $1.7 billion at September 30, 2015 , and 2014 , respectively. (b) Net financing revenue after the provision for loan losses totaled $759 million and $787 million for the three months ended September 30, 2015 , and 2014 , respectively. Nine months ended September 30, ($ in millions) Automotive Finance operations Insurance operations Mortgage operations Corporate and Other (a) Consolidated (b) 2015 Net financing revenue $ 2,529 $ 42 $ 50 $ 115 $ 2,736 Other revenue (loss) 170 769 84 (237 ) 786 Total net revenue (loss) 2,699 811 134 (122 ) 3,522 Provision for loan losses 460 — 4 3 467 Total noninterest expense 1,160 678 46 209 2,093 Income (loss) from continuing operations before income tax expense $ 1,079 $ 133 $ 84 $ (334 ) $ 962 Total assets $ 113,843 $ 6,997 $ 9,772 $ 25,493 $ 156,105 2014 Net financing revenue (loss) $ 2,554 $ 47 $ 35 $ (60 ) $ 2,576 Other revenue 195 849 13 4 1,061 Total net revenue (loss) 2,749 896 48 (56 ) 3,637 Provision for loan losses 367 — (55 ) (10 ) 302 Total noninterest expense 1,167 785 62 262 2,276 Income (loss) from continuing operations before income tax expense $ 1,215 $ 111 $ 41 $ (308 ) $ 1,059 Total assets $ 110,937 $ 7,178 $ 7,402 $ 23,678 $ 149,195 (a) Total assets for Corporate Finance were $2.3 billion and $1.7 billion at September 30, 2015 , and 2014 , respectively. (b) Net financing revenue after the provision for loan losses totaled $2.3 billion for each of the nine months ended September 30, 2015 , and 2014 , respectively.
Information Concerning Principal Geographic Areas [Table Text Block]	Information concerning principal geographic areas was as follows. Three months ended September 30, ($ in millions) Revenue (a) Income (loss) Net income (b)(c) 2015 Canada $ 24 $ 11 $ 9 Europe — 1 — Asia-Pacific — — — Total foreign (d) 24 12 9 Total domestic (e) 1,278 405 259 Total $ 1,302 $ 417 $ 268 2014 Canada $ 31 $ 7 $ 9 Europe — (1 ) 1 Asia-Pacific — — 29 Total foreign 31 6 39 Total domestic (e) 1,233 414 384 Total $ 1,264 $ 420 $ 423 (a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements . (b) Domestic amounts include original discount amortization of $16 million and $51 million for the three months ended September 30, 2015 , and 2014 , respectively. (c) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated. (d) Our foreign operations as of September 30, 2015 , consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down. (e) Amounts include eliminations between our domestic and foreign operations. Nine months ended September 30, ($ in millions) Revenue (a) Income Net income (loss) (b)(c) 2015 Canada $ 76 $ 35 $ 30 Europe 1 5 28 Latin America — — — Asia-Pacific — — 452 Total foreign (d) 77 40 510 Total domestic (e) 3,445 922 516 Total $ 3,522 $ 962 $ 1,026 2014 Canada $ 95 $ 36 $ 55 Europe 2 — 5 Latin America — — (8 ) Asia-Pacific — — 95 Total foreign 97 36 147 Total domestic (e) 3,540 1,023 826 Total $ 3,637 $ 1,059 $ 973 (a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements . (b) Domestic amounts include original discount amortization of $45 million and $149 million for the nine months ended September 30, 2015 , and 2014 , respectively. (c) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated. (d) Our foreign operations as of September 30, 2015 , consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down. (e) Amounts include eliminations between our domestic and foreign operations.

Parent And Guarantor Consolid58

Parent And Guarantor Consolidating Financial Statements (Tables)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Income Statement [Table Text Block]	Condensed Consolidating Statements of Comprehensive Income Three months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (33 ) $ — $ 1,199 $ — $ 1,166 Interest and fees on finance receivables and loans — intercompany 3 — 1 (4 ) — Interest on loans held-for-sale — — 2 — 2 Interest and dividends on available-for-sale investment securities — — 102 — 102 Interest on cash and cash equivalents — — 2 — 2 Interest-bearing cash — intercompany — — 2 (2 ) — Operating leases 1 — 829 — 830 Total financing revenue and other interest income (29 ) — 2,137 (6 ) 2,102 Interest expense Interest on deposits 3 — 178 — 181 Interest on short-term borrowings 10 — 3 — 13 Interest on long-term debt 272 — 138 — 410 Interest on intercompany debt 3 — 3 (6 ) — Total interest expense 288 — 322 (6 ) 604 Depreciation expense on operating lease assets 1 — 527 — 528 Net financing (loss) revenue (318 ) — 1,288 — 970 Cash dividends from subsidiaries Nonbank subsidiaries 494 — — (494 ) — Other revenue Servicing fees 289 — 210 (487 ) 12 Insurance premiums and service revenue earned — — 236 — 236 Loss on mortgage and automotive loans, net (1 ) — (1 ) — (2 ) Other gain on investments, net — — 6 — 6 Other income, net of losses 78 — 119 (117 ) 80 Total other revenue 366 — 570 (604 ) 332 Total net revenue 542 — 1,858 (1,098 ) 1,302 Provision for loan losses 48 — 163 — 211 Noninterest expense Compensation and benefits expense 138 — 212 (115 ) 235 Insurance losses and loss adjustment expenses — — 61 — 61 Other operating expenses 315 — 552 (489 ) 378 Total noninterest expense 453 — 825 (604 ) 674 Income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries 41 — 870 (494 ) 417 Income tax (benefit) expense from continuing operations (30 ) — 174 — 144 Net income from continuing operations 71 — 696 (494 ) 273 Loss from discontinued operations, net of tax (5 ) — — — (5 ) Undistributed income (loss) of subsidiaries Bank subsidiary 254 254 — (508 ) — Nonbank subsidiaries (52 ) (1 ) — 53 — Net income 268 253 696 (949 ) 268 Other comprehensive income, net of tax 61 65 55 (120 ) 61 Comprehensive income $ 329 $ 318 $ 751 $ (1,069 ) $ 329 Three months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ 16 $ — $ 1,098 $ — $ 1,114 Interest and fees on finance receivables and loans — intercompany 10 — 21 (31 ) — Interest and dividends on available-for-sale investment securities — — 94 — 94 Interest on cash and cash equivalents — — 2 — 2 Interest-bearing cash - intercompany — — 1 (1 ) — Operating leases 1 — 898 — 899 Total financing revenue and other interest income 27 — 2,114 (32 ) 2,109 Interest expense Interest on deposits 3 — 163 — 166 Interest on short-term borrowings 10 — 2 — 12 Interest on long-term debt 350 — 143 — 493 Interest on intercompany debt 22 — 10 (32 ) — Total interest expense 385 — 318 (32 ) 671 Depreciation expense on operating lease assets (4 ) — 553 — 549 Net financing (loss) revenue (354 ) — 1,243 — 889 Cash dividends from subsidiaries Bank subsidiaries 150 150 — (300 ) — Nonbank subsidiaries 141 — — (141 ) — Other revenue Servicing fees 6 — — — 6 Insurance premiums and service revenue earned — — 246 — 246 (Loss) gain on mortgage and automotive loans, net (2 ) — 2 — — Other gain on investments, net — — 45 — 45 Other income, net of losses 206 — 373 (501 ) 78 Total other revenue 210 — 666 (501 ) 375 Total net revenue 147 150 1,909 (942 ) 1,264 Provision for loan losses 88 — 14 — 102 Noninterest expense Compensation and benefits expense 153 — 199 (111 ) 241 Insurance losses and loss adjustment expenses — — 97 — 97 Other operating expenses 252 — 542 (390 ) 404 Total noninterest expense 405 — 838 (501 ) 742 (Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries (346 ) 150 1,057 (441 ) 420 Income tax (benefit) expense from continuing operations (68 ) — 195 — 127 Net (loss) income from continuing operations (278 ) 150 862 (441 ) 293 Income from discontinued operations, net of tax 127 — 3 — 130 Undistributed income (loss) of subsidiaries Bank subsidiary 150 150 — (300 ) — Nonbank subsidiaries 424 (2 ) — (422 ) — Net income 423 298 865 (1,163 ) 423 Other comprehensive loss, net of tax (55 ) (3 ) (50 ) 53 (55 ) Comprehensive income $ 368 $ 295 $ 815 $ (1,110 ) $ 368 Nine months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (45 ) $ — $ 3,403 $ — $ 3,358 Interest and fees on finance receivables and loans — intercompany 15 — 22 (37 ) — Interest on loans held-for-sale — — 40 — 40 Interest and dividends on available-for-sale investment securities — — 283 — 283 Interest on cash and cash equivalents 1 — 5 — 6 Interest-bearing cash — intercompany — — 6 (6 ) — Operating leases 1 — 2,585 — 2,586 Total financing revenue and other interest income (28 ) — 6,344 (43 ) 6,273 Interest expense Interest on deposits 8 — 522 — 530 Interest on short-term borrowings 30 — 6 — 36 Interest on long-term debt 856 — 402 — 1,258 Interest on intercompany debt 28 — 15 (43 ) — Total interest expense 922 — 945 (43 ) 1,824 Depreciation expense on operating lease assets 1 — 1,712 — 1,713 Net financing (loss) revenue (951 ) — 3,687 — 2,736 Cash dividends from subsidiaries Bank subsidiary 525 525 — (1,050 ) — Nonbank subsidiaries 980 — — (980 ) — Other revenue Servicing fees 846 — 621 (1,435 ) 32 Insurance premiums and service revenue earned — — 706 — 706 (Loss) gain on mortgage and automotive loans, net (9 ) — 54 — 45 Loss on extinguishment of debt (353 ) — (1 ) — (354 ) Other gain on investments, net — — 106 — 106 Other income, net of losses 199 — 398 (346 ) 251 Total other revenue 683 — 1,884 (1,781 ) 786 Total net revenue 1,237 525 5,571 (3,811 ) 3,522 Provision for loan losses 111 — 356 — 467 Noninterest expense Compensation and benefits expense 431 — 634 (339 ) 726 Insurance losses and loss adjustment expenses — — 239 — 239 Other operating expenses 935 — 1,635 (1,442 ) 1,128 Total noninterest expense 1,366 — 2,508 (1,781 ) 2,093 (Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries (240 ) 525 2,707 (2,030 ) 962 Income tax (benefit) expense from continuing operations (231 ) — 572 — 341 Net (loss) income from continuing operations (9 ) 525 2,135 (2,030 ) 621 Income from discontinued operations, net of tax 367 — 38 — 405 Undistributed income (loss) of subsidiaries Bank subsidiary 302 302 — (604 ) — Nonbank subsidiaries 366 (1 ) — (365 ) — Net income 1,026 826 2,173 (2,999 ) 1,026 Other comprehensive (loss) income, net of tax (56 ) 40 (64 ) 24 (56 ) Comprehensive income $ 970 $ 866 $ 2,109 $ (2,975 ) $ 970 Nine months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Financing revenue and other interest income Interest and fees on finance receivables and loans $ (2 ) $ — $ 3,347 $ — $ 3,345 Interest and fees on finance receivables and loans — intercompany 26 — 64 (90 ) — Interest on loans held-for-sale — — 1 — 1 Interest and dividends on available-for-sale investment securities — — 282 — 282 Interest on cash and cash equivalents 1 — 5 — 6 Interest-bearing — intercompany — — 4 (4 ) — Operating leases 269 — 2,384 — 2,653 Total financing revenue and other interest income 294 — 6,087 (94 ) 6,287 Interest expense Interest on deposits 11 — 484 — 495 Interest on short-term borrowings 32 — 8 — 40 Interest on long-term debt 1,143 — 433 — 1,576 Interest on intercompany debt 68 — 26 (94 ) — Total interest expense 1,254 — 951 (94 ) 2,111 Depreciation expense on operating lease assets 164 — 1,436 — 1,600 Net financing (loss) revenue (1,124 ) — 3,700 — 2,576 Cash dividends from subsidiaries Bank subsidiary 1,650 1,650 — (3,300 ) — Nonbank subsidiaries 462 — — (462 ) — Other revenue Servicing fees 22 — — — 22 Insurance premiums and service revenue earned — — 736 — 736 (Loss) gain on mortgage and automotive loans, net (2 ) — 8 — 6 Loss on extinguishment of debt (46 ) — — — (46 ) Other gain on investments, net — — 129 — 129 Other income, net of losses 591 — 1,007 (1,384 ) 214 Total other revenue 565 — 1,880 (1,384 ) 1,061 Total net revenue 1,553 1,650 5,580 (5,146 ) 3,637 Provision for loan losses 165 — 137 — 302 Noninterest expense Compensation and benefits expense 441 — 604 (335 ) 710 Insurance losses and loss adjustment expenses — — 353 — 353 Other operating expenses 648 — 1,614 (1,049 ) 1,213 Total noninterest expense 1,089 — 2,571 (1,384 ) 2,276 Income from continuing operations before income tax (benefit) expense and undistributed (loss) income of subsidiaries 299 1,650 2,872 (3,762 ) 1,059 Income tax (benefit) expense from continuing operations (309 ) — 594 — 285 Net income from continuing operations 608 1,650 2,278 (3,762 ) 774 Income from discontinued operations, net of tax 172 — 27 — 199 Undistributed (loss) income of subsidiaries Bank subsidiary (802 ) (802 ) — 1,604 — Nonbank subsidiaries 995 (2 ) — (993 ) — Net income 973 846 2,305 (3,151 ) 973 Other comprehensive income, net of tax 126 116 124 (240 ) 126 Comprehensive income $ 1,099 $ 962 $ 2,429 $ (3,391 ) $ 1,099
Condensed Balance Sheet [Table Text Block]	Condensed Consolidating Balance Sheet September 30, 2015 ($ in millions) Parent (a) Guarantors Nonguarantors (a) Consolidating adjustments Ally consolidated Assets Cash and cash equivalents Noninterest-bearing $ 797 $ — $ 869 $ — $ 1,666 Interest-bearing 1,201 — 2,360 — 3,561 Interest-bearing — intercompany — — 722 (722 ) — Total cash and cash equivalents 1,998 — 3,951 (722 ) 5,227 Investment securities — — 18,758 — 18,758 Loans held-for-sale, net — — 37 — 37 Finance receivables and loans, net Finance receivables and loans, net 3,818 — 104,173 — 107,991 Intercompany loans to Nonbank subsidiaries 1,781 — 546 (2,327 ) — Allowance for loan losses (86 ) — (932 ) — (1,018 ) Total finance receivables and loans, net 5,513 — 103,787 (2,327 ) 106,973 Investment in operating leases, net 92 — 17,200 — 17,292 Intercompany receivables from Bank subsidiary 338 — — (338 ) — Nonbank subsidiaries 218 — 242 (460 ) — Investment in subsidiaries Bank subsidiary 16,296 16,296 — (32,592 ) — Nonbank subsidiaries 10,931 12 — (10,943 ) — Premiums receivable and other insurance assets — — 1,816 (22 ) 1,794 Other assets 4,932 — 3,971 (2,879 ) 6,024 Total assets $ 40,318 $ 16,308 $ 149,762 $ (50,283 ) $ 156,105 Liabilities Deposit liabilities Noninterest-bearing $ — $ — $ 91 $ — $ 91 Interest-bearing 248 — 63,702 — 63,950 Total deposit liabilities 248 — 63,793 — 64,041 Short-term borrowings 3,458 — 1,920 — 5,378 Long-term debt 19,820 — 47,641 — 67,461 Intercompany debt to Nonbank subsidiaries 1,268 — 1,781 (3,049 ) — Intercompany payables to Bank subsidiary 24 — — (24 ) — Nonbank subsidiaries 374 — 420 (794 ) — Interest payable 223 — 214 — 437 Unearned insurance premiums and service revenue — — 2,438 — 2,438 Accrued expenses and other liabilities 304 82 4,245 (2,880 ) 1,751 Total liabilities 25,719 82 122,452 (6,747 ) 141,506 Total equity 14,599 16,226 27,310 (43,536 ) 14,599 Total liabilities and equity $ 40,318 $ 16,308 $ 149,762 $ (50,283 ) $ 156,105 (a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership. December 31, 2014 ($ in millions) Parent (a) Guarantors Nonguarantors (a) Consolidating adjustments Ally consolidated Assets Cash and cash equivalents Noninterest-bearing $ 986 $ — $ 362 $ — $ 1,348 Interest-bearing 1,300 — 2,928 — 4,228 Interest-bearing — intercompany — — 615 (615 ) — Total cash and cash equivalents 2,286 — 3,905 (615 ) 5,576 Investment securities — — 16,137 — 16,137 Loans held-for-sale, net 3 — 2,000 — 2,003 Finance receivables and loans, net Finance receivables and loans, net 4,225 — 95,723 — 99,948 Intercompany loans to Bank subsidiary 625 — — (625 ) — Nonbank subsidiaries 3,500 — 1,770 (5,270 ) — Allowance for loan losses (102 ) — (875 ) — (977 ) Total finance receivables and loans, net 8,248 — 96,618 (5,895 ) 98,971 Investment in operating leases, net — — 19,510 — 19,510 Intercompany receivables from Bank subsidiary 219 — — (219 ) — Nonbank subsidiaries 267 — 393 (660 ) — Investment in subsidiaries Bank subsidiary 15,967 15,967 — (31,934 ) — Nonbank subsidiaries 11,559 12 — (11,571 ) — Premiums receivable and other insurance assets — — 1,717 (22 ) 1,695 Other assets 4,889 — 4,879 (2,466 ) 7,302 Assets of operations held-for-sale 634 — — — 634 Total assets $ 44,072 $ 15,979 $ 145,159 $ (53,382 ) $ 151,828 Liabilities Deposit liabilities Noninterest-bearing $ — $ — $ 64 $ — $ 64 Interest-bearing 319 — 57,839 — 58,158 Total deposit liabilities 319 — 57,903 — 58,222 Short-term borrowings 3,338 — 3,724 — 7,062 Long-term debt 21,199 — 45,359 — 66,558 Intercompany debt to Nonbank subsidiaries 2,385 — 4,125 (6,510 ) — Intercompany payables to Bank subsidiary 94 — — (94 ) — Nonbank subsidiaries 454 — 354 (808 ) — Interest payable 316 — 161 — 477 Unearned insurance premiums and service revenue — — 2,375 — 2,375 Accrued expenses and other liabilities 568 82 3,551 (2,466 ) 1,735 Total liabilities 28,673 82 117,552 (9,878 ) 136,429 Total equity 15,399 15,897 27,607 (43,504 ) 15,399 Total liabilities and equity $ 44,072 $ 15,979 $ 145,159 $ (53,382 ) $ 151,828 (a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.
Condensed Cash Flow Statement [Table Text Block]	Condensed Consolidating Statement of Cash Flows Nine months ended September 30, 2015 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Operating activities Net cash provided by operating activities $ 51 $ 525 $ 5,408 $ (2,030 ) $ 3,954 Investing activities Purchases of available-for-sale securities — — (10,011 ) — (10,011 ) Proceeds from sales of available-for-sale securities — — 4,408 — 4,408 Proceeds from maturities and repayments of available-for-sale securities — — 3,141 — 3,141 Net decrease (increase) in finance receivables and loans 398 — (9,573 ) — (9,175 ) Proceeds from sales of finance receivables and loans — — 2,665 — 2,665 Net decrease in loans — intercompany 2,392 — 1,225 (3,617 ) — Net (increase) decrease in operating lease assets (94 ) — 526 — 432 Capital contributions to subsidiaries (228 ) (1 ) 1 228 — Returns of contributed capital 881 — — (881 ) — Proceeds from sale of business units, net 1,049 — — — 1,049 Net change in restricted cash (12 ) — 501 — 489 Other, net (29 ) — 12 — (17 ) Net cash provided by (used in) investing activities 4,357 (1 ) (7,105 ) (4,270 ) (7,019 ) Financing activities Net change in short-term borrowings — third party 120 — (1,812 ) — (1,692 ) Net (decrease) increase in deposits (72 ) — 5,891 — 5,819 Proceeds from issuance of long-term debt — third party 4,037 — 19,807 — 23,844 Repayments of long-term debt — third party (5,866 ) — (17,588 ) — (23,454 ) Net change in debt — intercompany (1,117 ) — (2,393 ) 3,510 — Repurchase and redemption of preferred stock (442 ) — — — (442 ) Dividends paid — third party (1,356 ) — — — (1,356 ) Dividends paid and returns of contributed capital — intercompany — (525 ) (2,386 ) 2,911 — Capital contributions from parent — 1 227 (228 ) — Net cash (used in) provided by financing activities (4,696 ) (524 ) 1,746 6,193 2,719 Effect of exchange-rate changes on cash and cash equivalents — — (3 ) — (3 ) Net (decrease) increase in cash and cash equivalents (288 ) — 46 (107 ) (349 ) Cash and cash equivalents at beginning of year 2,286 — 3,905 (615 ) 5,576 Cash and cash equivalents at September 30 $ 1,998 $ — $ 3,951 $ (722 ) $ 5,227 Nine months ended September 30, 2014 ($ in millions) Parent Guarantors Nonguarantors Consolidating adjustments Ally consolidated Operating activities Net cash provided by operating activities $ 544 $ 1,639 $ 4,036 $ (3,761 ) $ 2,458 Investing activities Purchases of available-for-sale securities — — (4,117 ) — (4,117 ) Proceeds from sales of available-for-sale securities — — 2,974 — 2,974 Proceeds from maturities and repayments of available-for-sale securities — — 1,877 — 1,877 Net decrease (increase) in finance receivables and loans 1,669 — (2,936 ) — (1,267 ) Proceeds from sales of finance receivables and loans — — 1,557 — 1,557 Net (increase) decrease in loans — intercompany (104 ) — 147 (43 ) — Net decrease (increase) in operating lease assets 146 — (3,411 ) — (3,265 ) Capital contributions to subsidiaries (744 ) — — 744 — Returns of contributed capital 1,251 — — (1,251 ) — Proceeds from sale of business unit, net 46 — 1 — 47 Net change in restricted cash — — 2,128 — 2,128 Other, net (17 ) — 88 — 71 Net cash provided by (used in) investing activities 2,247 — (1,692 ) (550 ) 5 Financing activities Net change in short-term borrowings — third party 151 — (3,449 ) — (3,298 ) Net (decrease) increase in deposits (72 ) — 3,573 — 3,501 Proceeds from issuance of long-term debt — third party 2,310 — 16,632 — 18,942 Repayments of long-term debt — third party (5,535 ) — (15,704 ) — (21,239 ) Net change in debt — intercompany (143 ) — 104 39 — Dividends paid — third party (200 ) — — — (200 ) Dividends paid and returns of contributed capital — intercompany — (1,676 ) (3,337 ) 5,013 — Capital contributions from parent — — 744 (744 ) — Net cash used in financing activities (3,489 ) (1,676 ) (1,437 ) 4,308 (2,294 ) Effect of exchange-rate changes on cash and cash equivalents — — (1 ) — (1 ) Net (decrease) increase in cash and cash equivalents (698 ) (37 ) 906 (3 ) 168 Cash and cash equivalents at beginning of year 2,930 37 2,974 (410 ) 5,531 Cash and cash equivalents at September 30 $ 2,232 $ — $ 3,880 $ (413 ) $ 5,699

Discontinued and Held-for-sal59

Discontinued and Held-for-sale Operations (Selected Income Statement Information for Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Automotive finance operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Method Investment, Realized Gain (Loss) on Disposal			$ 400
Total net (loss) revenue - Discontinued Operations	$ 0	$ 29	0	$ 95
Pretax income (loss) including direct costs to transact a sale	(1)	46	452	101
Tax (benefit) expense - Discontinued Operations	3	0	68	4
Other Segments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) including direct costs to transact a sale	(1)	5	19	25
Tax (benefit) expense - Discontinued Operations	$ 0	$ (79)	$ (2)	$ (77)

Discontinued and Held-for-sal60

Discontinued and Held-for-sale Operations (Select Balance Sheet Information for Held-for-sale Operations) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other Assets	$ 6,024	$ 7,302
Automotive finance operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sold Interest in Joint Venture	40.00%
Other Assets		$ 634

Other Income, Net Of Losses (Sc

Other Income, Net Of Losses (Schedule of Other Income, Net Of Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Nonoperating Income (Expense) [Abstract]
Remarketing Fees	$ 25	$ 28	$ 78	$ 85
Fees and Commissions, Other	23	23	66	66
Income (Loss) from Equity Method Investments	11	5	48	13
Other Income	21	22	59	50
Other income, net of losses	$ 80	$ 78	$ 251	$ 214

Other Operating Expenses (Sched

Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Expenses [Abstract]
Insurance Commissions	$ 95	$ 95	$ 283	$ 279
Communications and Information Technology	65	77	198	255
Lease And Loan Administration	31	32	92	92
Marketing and Advertising Expense	26	27	80	81
Professional Fees	23	20	68	73
Depreciation, Nonproduction	20	23	62	61
Regulatory and licensing fees	18	23	59	69
Vehicle remarketing and repossession	20	22	56	61
Occupancy, Net	13	12	38	34
Non-Income Taxes	11	12	26	32
Other Cost and Expense, Operating	56	61	166	176
Total other operating expenses	$ 378	$ 404	$ 1,128	$ 1,213

Investment Securities (Schedule

Investment Securities (Schedule of Available-for-sale Securities Reconciliation) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 18,782	$ 16,107
Available-for-sale Securities, Gross Unrealized Gains	180	213
Available-for-sale Securities, Gross Unrealized Losses	(204)	(183)
Available-for-sale Securities	18,758	16,137
Total agency backed bonds	8,536	7,557
Deposit Assets	15	15
Financial Instruments Owned and Pledged as Collateral, Amount Eligible to be Repledged by Counterparty	1,702	801
Cash Equivalents, at Carrying Value	1,300	2,000
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	17,685	15,216
Available-for-sale Debt Securities Gross Unrealized Gain	179	164
Available-for-sale Debt Securities, Gross Unrealized Loss	(91)	(149)
Available-for-sale Securities, Debt Securities	17,773	15,231
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,805	1,195
Available-for-sale Debt Securities Gross Unrealized Gain	5	1
Available-for-sale Debt Securities, Gross Unrealized Loss	(1)	(18)
Available-for-sale Securities, Debt Securities	1,809	1,178
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	635	389
Available-for-sale Debt Securities Gross Unrealized Gain	17	17
Available-for-sale Debt Securities, Gross Unrealized Loss	(1)	0
Available-for-sale Securities, Debt Securities	651	406
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	176	224
Available-for-sale Debt Securities Gross Unrealized Gain	8	8
Available-for-sale Debt Securities, Gross Unrealized Loss	0	0
Available-for-sale Securities, Debt Securities	184	232
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	11,560	10,431
Available-for-sale Debt Securities Gross Unrealized Gain	130	119
Available-for-sale Debt Securities, Gross Unrealized Loss	(76)	(125)
Available-for-sale Securities, Debt Securities	11,614	10,425
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	519	254
Available-for-sale Debt Securities Gross Unrealized Gain	0	0
Available-for-sale Debt Securities, Gross Unrealized Loss	(2)	(1)
Available-for-sale Securities, Debt Securities	517	253
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,947	1,989
Available-for-sale Debt Securities Gross Unrealized Gain	6	5
Available-for-sale Debt Securities, Gross Unrealized Loss	(2)	(3)
Available-for-sale Securities, Debt Securities	1,951	1,991
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,043	734
Available-for-sale Debt Securities Gross Unrealized Gain	13	14
Available-for-sale Debt Securities, Gross Unrealized Loss	(9)	(2)
Available-for-sale Securities, Debt Securities	1,047	746
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	1,097	891
Available-for-sale Equity Securities, Gross Unrealized Gain	1	49
Available-for-sale Equity Securities, Gross Unrealized Loss	(113)	(34)
Available-for-sale Securities, Equity Securities	$ 985	$ 906

Investment Securities (Investme

Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	$ 121	$ 108
Available-for-sale debt securities, Due after one year through five years, Amount	2,863	2,676
Available-for-sale debt securities, Due after five years through ten years, Amount	2,084	1,383
Available-for-sale debt securities, Due after ten years, Amount	12,705	11,064
Amortized cost of available-for-sale debt securities, Due in one year or less, Amount	120	108
Amortized cost of available-for-sale debt securities, Due after one year through five years, Amount	2,854	2,674
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	2,067	1,374
Amortized cost of available-for-sale debt securities, Due after ten years, Amount	$ 12,644	$ 11,060
Available-for-sale debt securities, Yield	2.60%	2.50%
Available-for-sale debt securities, Due in one year or less, Yield	2.60%	2.70%
Available-for-sale debt securities, Due after one year through five years, Yield	1.90%	1.90%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.50%	2.40%
Available-for-sale debt securities, Due after ten years, Yield	2.80%	2.60%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 17,685	$ 15,216
Available-for-sale Securities, Debt Securities	17,773	15,231
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	7	7
Available-for-sale debt securities, Due after one year through five years, Amount	905	677
Available-for-sale debt securities, Due after five years through ten years, Amount	897	494
Available-for-sale debt securities, Due after ten years, Amount	$ 0	$ 0
Available-for-sale debt securities, Yield	1.60%	1.50%
Available-for-sale debt securities, Due in one year or less, Yield	5.00%	3.00%
Available-for-sale debt securities, Due after one year through five years, Yield	1.20%	1.20%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.10%	1.90%
Available-for-sale debt securities, Due after ten years, Yield	0.00%	0.00%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 1,805	$ 1,195
Available-for-sale Securities, Debt Securities	1,809	1,178
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	53	34
Available-for-sale debt securities, Due after one year through five years, Amount	48	12
Available-for-sale debt securities, Due after five years through ten years, Amount	130	106
Available-for-sale debt securities, Due after ten years, Amount	$ 420	$ 254
Available-for-sale debt securities, Yield	3.30%	3.70%
Available-for-sale debt securities, Due in one year or less, Yield	2.20%	1.90%
Available-for-sale debt securities, Due after one year through five years, Yield	2.20%	2.10%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.90%	3.00%
Available-for-sale debt securities, Due after ten years, Yield	3.70%	4.30%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 635	$ 389
Available-for-sale Securities, Debt Securities	651	406
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	9	0
Available-for-sale debt securities, Due after one year through five years, Amount	82	128
Available-for-sale debt securities, Due after five years through ten years, Amount	93	104
Available-for-sale debt securities, Due after ten years, Amount	$ 0	$ 0
Available-for-sale debt securities, Yield	2.60%	2.70%
Available-for-sale debt securities, Due in one year or less, Yield	1.40%	0.00%
Available-for-sale debt securities, Due after one year through five years, Yield	2.70%	2.50%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.70%	2.90%
Available-for-sale debt securities, Due after ten years, Yield	0.00%	0.00%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 176	$ 224
Available-for-sale Securities, Debt Securities	184	232
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	0	34
Available-for-sale debt securities, Due after one year through five years, Amount	38	58
Available-for-sale debt securities, Due after five years through ten years, Amount	40	0
Available-for-sale debt securities, Due after ten years, Amount	$ 11,536	$ 10,333
Available-for-sale debt securities, Yield	2.80%	2.60%
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	3.10%
Available-for-sale debt securities, Due after one year through five years, Yield	2.10%	2.10%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.50%	0.00%
Available-for-sale debt securities, Due after ten years, Yield	2.80%	2.60%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 11,560	$ 10,431
Available-for-sale Securities, Debt Securities	11,614	10,425
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	0	0
Available-for-sale debt securities, Due after one year through five years, Amount	0	30
Available-for-sale debt securities, Due after five years through ten years, Amount	3	0
Available-for-sale debt securities, Due after ten years, Amount	$ 514	$ 223
Available-for-sale debt securities, Yield	1.90%	1.50%
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	0.00%
Available-for-sale debt securities, Due after one year through five years, Yield	0.00%	1.80%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.70%	0.00%
Available-for-sale debt securities, Due after ten years, Yield	1.90%	1.40%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 519	$ 254
Available-for-sale Securities, Debt Securities	517	253
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	4	0
Available-for-sale debt securities, Due after one year through five years, Amount	1,189	1,311
Available-for-sale debt securities, Due after five years through ten years, Amount	553	463
Available-for-sale debt securities, Due after ten years, Amount	$ 205	$ 217
Available-for-sale debt securities, Yield	2.10%	1.90%
Available-for-sale debt securities, Due in one year or less, Yield	1.40%	0.00%
Available-for-sale debt securities, Due after one year through five years, Yield	2.00%	1.90%
Available-for-sale debt securities, Due after five years through ten years, Yield	2.40%	2.00%
Available-for-sale debt securities, Due after ten years, Yield	2.20%	2.20%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 1,947	$ 1,989
Available-for-sale Securities, Debt Securities	1,951	1,991
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities, Due in one year or less, Amount	48	33
Available-for-sale debt securities, Due after one year through five years, Amount	601	460
Available-for-sale debt securities, Due after five years through ten years, Amount	368	216
Available-for-sale debt securities, Due after ten years, Amount	$ 30	$ 37
Available-for-sale debt securities, Yield	2.90%	3.20%
Available-for-sale debt securities, Due in one year or less, Yield	3.10%	3.10%
Available-for-sale debt securities, Due after one year through five years, Yield	2.50%	2.70%
Available-for-sale debt securities, Due after five years through ten years, Yield	3.30%	3.80%
Available-for-sale debt securities, Due after ten years, Yield	5.50%	5.60%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 1,043	$ 734
Available-for-sale Securities, Debt Securities	$ 1,047	$ 746

Investment Securities (Invest65

Investment Securities (Investment Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Available-for-sale Securities [Abstract]
Taxable interest	$ 90	$ 87	$ 252	$ 256
Taxable dividends	7	6	18	18
Interest and dividends exempt from U.S. federal income tax	5	1	13	8
Interest and dividends on available-for-sale investment securities	$ 102	$ 94	$ 283	$ 282

Investment Securities (Schedu66

Investment Securities (Schedule Of Realized Gain (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Gross Realized Gains	$ 28	$ 48	$ 134	$ 150
Available-for-sale Securities, Gross Realized Losses	(11)	(3)	(14)	(11)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	(11)	0	(14)	(10)
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 6	$ 45	$ 106	$ 129

Investment Securities (Schedu67

Investment Securities (Schedule of Unrealized Loss on Investments) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	$ 4,071	$ 2,701
Available-for-sale Securities, Unrealized Loss Less than 12 months	(106)	(42)
Available-for-sale Securities, Fair value 12 months or longer	2,992	4,016
Available-for-sale Securities, Unrealized Loss 12 months or longer	(98)	(141)
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	3,278	2,470
Available-for-sale Securities, Unrealized Loss Less than 12 months	(22)	(18)
Available-for-sale Securities, Fair value 12 months or longer	2,924	3,976
Available-for-sale Securities, Unrealized Loss 12 months or longer	(69)	(131)
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	220	297
Available-for-sale Securities, Unrealized Loss Less than 12 months	0	(3)
Available-for-sale Securities, Fair value 12 months or longer	373	859
Available-for-sale Securities, Unrealized Loss 12 months or longer	(1)	(15)
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	173	50
Available-for-sale Securities, Unrealized Loss Less than 12 months	(1)	0
Available-for-sale Securities, Fair value 12 months or longer	0	0
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	0
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	9	0
Available-for-sale Securities, Unrealized Loss Less than 12 months	0	0
Available-for-sale Securities, Fair value 12 months or longer	0	0
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	0
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	1,731	1,172
Available-for-sale Securities, Unrealized Loss Less than 12 months	(11)	(10)
Available-for-sale Securities, Fair value 12 months or longer	2,517	3,098
Available-for-sale Securities, Unrealized Loss 12 months or longer	(67)	(116)
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	696	819
Available-for-sale Securities, Unrealized Loss Less than 12 months	(2)	(3)
Available-for-sale Securities, Fair value 12 months or longer	24	8
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	0
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	449	132
Available-for-sale Securities, Unrealized Loss Less than 12 months	(8)	(2)
Available-for-sale Securities, Fair value 12 months or longer	10	11
Available-for-sale Securities, Unrealized Loss 12 months or longer	(1)	0
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	793	231
Available-for-sale Securities, Unrealized Loss Less than 12 months	(84)	(24)
Available-for-sale Securities, Fair value 12 months or longer	68	40
Available-for-sale Securities, Unrealized Loss 12 months or longer	$ (29)	$ (10)

Loans Held-for-Sale, Net Loan68

Loans Held-for-Sale, Net Loans Held-for-Sale, Net (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale, net	$ 37	$ 2,003
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale, net	0	1,515
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale, net	0	452
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale, net	$ 37	$ 36

Finance Receivables And Loans69

Finance Receivables And Loans, Net (Schedule of Accounts, Notes, Loans and Financing Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	$ 107,991		$ 107,991		$ 99,948
Interest and Fee Income, Loans and Leases	1,166	$ 1,114	3,358	$ 3,345
Designated as Hedging Instrument [Member] | Gain (Loss) Recognized in Earnings on Hedged Item [Member] | Interest Rate Contract [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest and Fee Income, Loans and Leases	38	$ (15)	73	$ 14
Fair Value Option Election, Fair Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	$ 107,991		107,991		99,948
Fair Value Option Election, Fair Value [Member] | Designated as Hedging Instrument [Member] | Gain (Loss) Recognized in Earnings on Hedged Item [Member] | Interest Rate Contract [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest and Fee Income, Loans and Leases			$ 107		35
One year or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	8.00%		8.00%
Two years or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	33.00%		33.00%
Three years or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	21.00%		21.00%
Four years or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	2.00%		2.00%
Five years or greater [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	4.00%		4.00%
loans held-for-investment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	$ 43		$ 43		266
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	63,610		63,610		56,570
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	9,770		9,770		7,474
Held For Investment Mortgage Finance Receivables Interest Only Mortgage Loans	1,000		1,000		1,200
Loans Receivable, Fair Value Disclosure	1		1		1
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	34,611		34,611		35,904
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	29,020		29,020		30,871
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	2,289		2,289		1,882
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans, net	$ 3,302		$ 3,302		$ 3,151

Finance Receivables And Loans70

Finance Receivables And Loans, Net (Allowance For Credit Losses On Financing Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	$ 974	$ 1,171	$ 977	$ 1,208
Allowance for Loan and Lease Losses, Write-offs	(231)	(201)	(621)	(554)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	70	52	210	187
Allowance for Loan and Lease Losses Write-offs, Net	(161)	(149)	(411)	(367)
Allowance for Loan and Lease Losses, Provision for Loss, Net	211	102	467	302
Allowance for Loan and Lease Losses, Adjustments, Net	(6)	(11)	(15)	(30)
Loans and Leases Receivable, Allowance, Ending Balance	1,018	1,113	1,018	1,113
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	89	220	89	220
Allowance for loan losses, Collectively evaluated for impairment	929	893	929	893
Finance receivables and loans, net	107,991		107,991		$ 99,948
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	107,990	99,517	107,990	99,517	99,947
Financing Receivable, Individually Evaluated for Impairment	628	1,266	628	1,266
Financing receivable, Collectively evaluated for impairment	107,362	98,249	107,362	98,249
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Finance receivables and loans, net	0	2	0	2
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	767	729	685	673
Allowance for Loan and Lease Losses, Write-offs	(220)	(188)	(579)	(511)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	64	51	195	170
Allowance for Loan and Lease Losses Write-offs, Net	(156)	(137)	(384)	(341)
Allowance for Loan and Lease Losses, Provision for Loss, Net	200	112	510	372
Allowance for Loan and Lease Losses, Adjustments, Net	(7)	(11)	(7)	(11)
Loans and Leases Receivable, Allowance, Ending Balance	804	693	804	693
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	22	25	22	25
Allowance for loan losses, Collectively evaluated for impairment	782	668	782	668
Finance receivables and loans, net	63,610		63,610		56,570
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	63,610	58,675	63,610	58,675
Financing Receivable, Individually Evaluated for Impairment	285	289	285	289
Financing receivable, Collectively evaluated for impairment	63,325	58,384	63,325	58,384
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Finance receivables and loans, net	0	2	0	2
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	119	302	152	389
Allowance for Loan and Lease Losses, Write-offs	(10)	(13)	(41)	(38)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	4	1	12	6
Allowance for Loan and Lease Losses Write-offs, Net	(6)	(12)	(29)	(32)
Allowance for Loan and Lease Losses, Provision for Loss, Net	6	(7)	4	(55)
Allowance for Loan and Lease Losses, Adjustments, Net	0	0	(8)	(19)
Loans and Leases Receivable, Allowance, Ending Balance	119	283	119	283
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	48	180	48	180
Allowance for loan losses, Collectively evaluated for impairment	71	103	71	103
Finance receivables and loans, net	9,770		9,770		7,474
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	9,769	7,594	9,769	7,594	7,473
Financing Receivable, Individually Evaluated for Impairment	268	904	268	904
Financing receivable, Collectively evaluated for impairment	9,501	6,690	9,501	6,690
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Finance receivables and loans, net	0	0	0	0
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	88	140	140	146
Allowance for Loan and Lease Losses, Write-offs	(1)	0	(1)	(5)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	2	0	3	11
Allowance for Loan and Lease Losses Write-offs, Net	1	0	2	6
Allowance for Loan and Lease Losses, Provision for Loss, Net	5	(3)	(47)	(15)
Allowance for Loan and Lease Losses, Adjustments, Net	1	0	0	0
Loans and Leases Receivable, Allowance, Ending Balance	95	137	95	137
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses, Individually evaluated for impairment	19	15	19	15
Allowance for loan losses, Collectively evaluated for impairment	76	122	76	122
Finance receivables and loans, net	34,611		34,611		$ 35,904
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	34,611	33,248	34,611	33,248
Financing Receivable, Individually Evaluated for Impairment	75	73	75	73
Financing receivable, Collectively evaluated for impairment	34,536	33,175	34,536	33,175
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Finance receivables and loans, net	$ 0	$ 0	$ 0	$ 0

Finance Receivables And Loans71

Finance Receivables And Loans, Net (Schedule Of Sales Of Financing Receivables And Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	$ 707	$ 1,562	$ 780	$ 1,602
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	704	1,562	704	1,562
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	2	0	75	40
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	$ 1	$ 0	$ 1	$ 0

Finance Receivables And Loans72

Finance Receivables And Loans, Net Finance Receivables And Loans, Net (Schedule of Purchases of Financing Receivables and Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	$ 1,262	$ 83	$ 3,912	$ 98
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	272	0	272	0
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	$ 990	$ 83	$ 3,640	$ 98

Finance Receivables And Loans73

Finance Receivables And Loans, Net (Past Due Financing Receivables And Loans) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 2,143	$ 2,031
Current	105,847	97,916
Finance receivables and loans, net	107,991	99,948
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	107,990	99,947	$ 99,517
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,929	1,797
Current	61,681	54,773
Finance receivables and loans, net	63,610	56,570
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	63,610		58,675
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	208	225
Current	9,561	7,248
Finance receivables and loans, net	9,770	7,474
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	9,769	7,473	7,594
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6	9
Current	34,605	35,895
Finance receivables and loans, net	34,611	35,904
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	34,611		$ 33,248
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6	9
Current	29,014	30,862
Finance receivables and loans, net	29,020	30,871
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	2,289	1,882
Finance receivables and loans, net	2,289	1,882
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	3,302	3,151
Finance receivables and loans, net	3,302	3,151
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,540	1,416
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,439	1,340
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	101	76
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	329	327
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	310	293
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	19	25
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	9
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	9
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	274	288
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	180	164
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	88	124
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	$ 0

Finance Receivables And Loans74

Finance Receivables And Loans, Net (Schedule of Financing Receivables, Non Accrual Status) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	$ 637	$ 645
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	413	386
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	149	177
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	75	82
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	26	32
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	45	46
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables and loans on nonaccrual status	$ 4	$ 4

Finance Receivables And Loans75

Finance Receivables And Loans, Net (Financing Receivable Credit Quality Indicators) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	$ 107,991	$ 99,948
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	107,990	99,947	$ 99,517
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	63,610	56,570
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	63,610		58,675
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	63,197	56,184
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	413	386
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	9,770	7,474
Loans and Leases Receivable, Gross, Excluding Fair Value Option Election	9,769	7,473	$ 7,594
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	9,620	7,296
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	$ 149	$ 177

Finance Receivables And Loans76

Finance Receivables And Loans, Net (Schedule Of Pass And Criticized Credit Quality Indicators Of Finance Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	$ 107,991	$ 99,948
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	34,611	35,904
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	32,435	33,674
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	2,176	2,230
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	29,020	30,871
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	27,423	29,150
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	1,597	1,721
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	2,289	1,882
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	1,856	1,509
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	433	373
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	3,302	3,151
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	3,156	3,015
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance receivables and loans, net	$ 146	$ 136

Finance Receivables And Loans77

Finance Receivables And Loans, Net (Impaired Financing Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	$ 631	$ 704
Carrying value before allowance	628	700
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	76	91
Impaired Financing Receivable, with Related Allowance, Recorded Investment	552	609
Impaired Financing Receivable, Related Allowance	89	106
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	285	282
Carrying value before allowance	285	282
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	285	282
Impaired Financing Receivable, Related Allowance	22	23
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	271	340
Carrying value before allowance	268	336
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	63	86
Impaired Financing Receivable, with Related Allowance, Recorded Investment	205	250
Impaired Financing Receivable, Related Allowance	48	62
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	75	82
Carrying value before allowance	75	82
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	13	5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	62	77
Impaired Financing Receivable, Related Allowance	19	21
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	26	32
Carrying value before allowance	26	32
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	9	4
Impaired Financing Receivable, with Related Allowance, Recorded Investment	17	28
Impaired Financing Receivable, Related Allowance	4	5
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	45	46
Carrying value before allowance	45	46
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	45	46
Impaired Financing Receivable, Related Allowance	15	15
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	4	4
Carrying value before allowance	4	4
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4	1
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	3
Impaired Financing Receivable, Related Allowance	$ 0	$ 1

Finance Receivables And Loans78

Finance Receivables And Loans, Net (Average Balance And Interest Income Of Impaired Finance Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 643	$ 1,297	$ 653	$ 1,358
Impaired Financing Receivable, Interest Income, Accrual Method	7	12	24	41
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	288	297	291	298
Impaired Financing Receivable, Interest Income, Accrual Method	4	5	13	14
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	268	914	283	923
Impaired Financing Receivable, Interest Income, Accrual Method	3	7	7	22
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	87	86	79	137
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	4	5
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	36	32	35	68
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	1	1
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	45	51	39	62
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	3	4
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	6	3	5	7
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 0	$ 0	$ 0

Finance Receivables and Loans79

Finance Receivables and Loans, Net (Troubled Debt Restructurings) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 601		$ 601		$ 681
Financing Receivable, Modifications, Number of Contracts	4,667	4,398	12,934	14,037
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 112	$ 79	$ 268	$ 365
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 103	$ 69	$ 237	$ 330
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4,612	4,361	12,763	13,681
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 75	$ 72	$ 202	$ 223
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 66	$ 63	$ 173	$ 193
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	53	37	169	350
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 13	$ 7	$ 42	$ 71
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 13	$ 6	$ 40	$ 66
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	0	2	6
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 24	$ 0	$ 24	$ 71
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 24	$ 0	$ 24	$ 71
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	0	0	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 23
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 23
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	0	1	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 21	$ 0	$ 21	$ 48
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 21	$ 0	$ 21	$ 48
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	0	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 3	$ 0	$ 3	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3	$ 0	$ 3	$ 0

Finance Receivables And Loans80

Finance Receivables And Loans, Net (Redefaults) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1,744	1,795	4,831	5,030
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 22	$ 23	$ 59	$ 64
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	12	$ 12	33	$ 33
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 2		$ 2		$ 4
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1,742	1,790	4,822	5,020
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 21	$ 22	$ 58	$ 62
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 12	$ 12	$ 33	$ 33
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	5	9	10
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1	$ 1	$ 1	$ 2
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0	$ 0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0

Investment In Operating Lease81

Investment In Operating Leases, Net (Investments In Operating Leases) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Leases, Operating [Abstract]
Property Subject to or Available for Operating Lease, Gross	$ 21,270	$ 23,144
Property Subject to or Available for Operating Lease, Accumulated Depreciation	(3,978)	(3,634)
Property Subject to or Available for Operating Lease, Net	$ 17,292	$ 19,510

Investment In Operating Lease82

Investment In Operating Leases, Net (Schedule Of Depreciation Expense On Operating Lease Assets) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Leases, Operating [Abstract]
Depreciation Expense On Operating Lease Assets	$ 633	$ 654	$ 1,995	$ 1,982
Gross Remarketing (Gains) Losses	(105)	(105)	(282)	(382)
Depreciation expense on operating lease assets	$ 528	$ 549	$ 1,713	$ 1,600

Securitizations And Variable 83

Securitizations And Variable Interest Entities (Schedule Of Variable Interest Entities) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Assets of nonconsolidated variable interest entities	$ 2,870	$ 2,801
Maximum exposure to loss in nonconsolidated VIEs	3,315	3,163
Total consoldiated involvement with VIEs	44,744	50,311
Other Assets	6,024	7,302
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	29,429	31,994
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	0	0
Assets of nonconsolidated variable interest entities	2,870	2,801
Maximum exposure to loss in nonconsolidated VIEs	2,870	2,801
Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Amount Outstanding	10,200	12,700
Commercial Portfolio Segment [Member] | Automobile Loan [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	15,118	18,171
Commercial Portfolio Segment [Member] | Other Financing Receivables [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	197	146
Assets of nonconsolidated variable interest entities	0	0
Maximum exposure to loss in nonconsolidated VIEs	445	362
Other Assets	211	164
Accrued Liabilities	$ 14	$ 18

Securitizations And Variable 84

Securitizations And Variable Interest Entities (Schedule Of Cash Flow Received and Paid To Nonconsolidated Securitization Entities) (Details) - Consumer Portfolio Segment [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Automobile Loan [Member]
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale	$ (3)	$ (3)
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers		1,044	$ 1,557
Cash Flows Between Transferor and Transferee, Servicing Fees		21	6
Representations and warranties obligations			0
Residential Mortgage [Member]
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers		0	0
Cash Flows Between Transferor and Transferee, Servicing Fees		$ 0	0
Representations and warranties obligations			$ (9)

Securitizations And Variable 85

Securitizations And Variable Interest Entities (Schedule Of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	$ 112,928		$ 112,928		$ 105,681
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	626		626		655
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	162	$ 150	414	$ 373
On-Balance Sheet Loans [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	108,028		108,028		101,951
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	603		603		617
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	161	149	411	367
On-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	9,770		9,770		7,926
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	107		107		151
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	6	12	29	32
On-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	63,610		63,610		58,085
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	490		490		457
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	156	137	384	341
On-Balance Sheet Loans [Member] | Commercial Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	32,322		32,322		34,022
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	6		6		9
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	0	0	0	1
On-Balance Sheet Loans [Member] | Commercial Portfolio Segment [Member] | Other Financing Receivables [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,326		2,326		1,918
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	0		0		0
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	(1)	0	(2)	(7)
Off-Balance Sheet Loans [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,870		2,870		2,801
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	8		8		5
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	1	0	3	1
Off-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,870		2,870		2,801
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	8		8		5
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	1	0	3	1
Whole-Loan Transactions [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,030		2,030		929
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	15		15		$ 33
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	$ 0	$ 1	$ 0	$ 5

Servicing Activities (Schedule

Servicing Activities (Schedule Of Total Serviced Automobile Loans Outstanding) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Automobile Serviced Assets [Line Items]
Servicing fees	$ 12	$ 6	$ 32	$ 22
Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing fees	12	$ 6	32	$ 22
Total Primary Serviced Assets	117,618		117,618		$ 115,391
Consumer Loan [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	63,352		63,352		58,085
Commercial Loan [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	32,322		32,322		34,022
Operating Leases [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	16,955		16,955		19,510
Other Assets [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	61		61		55
Securitizations [Member] | Off-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	2,901		2,901		2,832
Whole-Loan Transactions [Member] | Off-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Total Primary Serviced Assets	$ 2,027		$ 2,027		$ 887

Other Assets (Schedule Of Other

Other Assets (Schedule Of Other Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Other Assets [Abstract]
Property, Plant and Equipment, Gross	$ 648	$ 775
Accumulated depreciation	(436)	(550)
Property, Plant and Equipment, Net	212	225
Restricted cash collections for securitization trusts	1,791	2,221
Deferred Tax Assets, Net	1,459	1,812
Nonmarketable equity securities	313	271
Derivative Asset, Fair Value, Gross Asset	299	263
Cash reserve deposits held for securitization trusts	255	303
Unamortized Debt Issuance Expense	230	238
Other accounts receivable	196	298
Cash and securities collateral placed with counterparties	72	236
Other Assets, Miscellaneous	1,197	1,435
Other Assets	$ 6,024	$ 7,302

Deposit Liabilities (Schedule O

Deposit Liabilities (Schedule Of Deposit Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Deposits [Abstract]
Noninterest-bearing deposit liabilities	$ 91	$ 64
Interest-bearing Deposit Liabilities, by Component [Abstract]
Deposits, Savings Deposits	33,839	26,769
Time Deposits	29,864	31,070
Deposits, Retail	247	319
Total deposit liabilities	64,041	58,222
Time Deposits, $100,000 or More	$ 12,000	$ 13,000

Short-Term Borrowings (Schedule

Short-Term Borrowings (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Demand Notes	$ 3,374	$ 3,338
Federal Home Loan Bank, Advances, Short-term	400	2,950
Securities Sold under Agreements to Repurchase, Gross	1,520	774
Other Short-term Borrowings	84	0
Short-term borrowings	5,378	7,062
Non-derivative Cash Collateral Received from Counterparties Associated with the Repurchase Agreements.	4
Unsecured Debt [Member]
Short-term Debt [Line Items]
Demand Notes	3,374	3,338
Federal Home Loan Bank, Advances, Short-term	0	0
Securities Sold under Agreements to Repurchase, Gross	0	0
Other Short-term Borrowings	84	0
Short-term borrowings	3,458	3,338
Secured Debt [Member]
Short-term Debt [Line Items]
Demand Notes	0	0
Federal Home Loan Bank, Advances, Short-term	400	2,950
Securities Sold under Agreements to Repurchase, Gross	1,520	774
Other Short-term Borrowings	0	0
Short-term borrowings	1,920	$ 3,724
Secured Debt [Member] | Maturity up to 30 days [Member]
Short-term Debt [Line Items]
Mortgage-backed Residential Securities Sold under Agreements to Repurchase, Maturity Period	1,371
Secured Debt [Member] | Maturity Greater than 90 Days [Member]
Short-term Debt [Line Items]
Mortgage-backed Residential Securities Sold under Agreements to Repurchase, Maturity Period	$ 149

Long-Term Debt (Long-Term Debt

Long-Term Debt (Long-Term Debt Portfolio) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	$ 13,413	$ 17,438
Long-term Debt, Excluding Current Maturities	53,603	48,668
Derivative, Amount of Hedged Item	445	452
Long-term debt	67,461	66,558
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	1,848	4,809
Long-term Debt, Excluding Current Maturities	17,407	17,154
Derivative, Amount of Hedged Item	445	452
Long-term debt	19,700	22,415
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	11,565	12,629
Long-term Debt, Excluding Current Maturities	36,196	31,514
Derivative, Amount of Hedged Item	0	0
Long-term debt	47,761	44,143
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	2,600	2,600
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Long-term debt	$ 6,400	$ 2,800

Long-Term Debt (Scheduled Remai

Long-Term Debt (Scheduled Remaining Maturity Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
2,015	$ 3,725
2,016	12,010
2,017	18,710
2,018	11,767
2,019	7,112
2020 and thereafter	13,692
Derivative, Amount of Hedged Item	445	$ 452
Long-term debt	67,461	66,558
Unsecured Debt [Member]
Debt Instrument [Line Items]
2,015	(6)
2,016	1,860
2,017	4,307
2,018	2,854
2,019	1,591
2020 and thereafter	8,649
Derivative, Amount of Hedged Item	445	452
Long-term debt	19,700	22,415
Unsecured Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
2,015	11
2,016	1,934
2,017	4,393
2,018	2,951
2,019	1,625
2020 and thereafter	9,741
Derivative, Amount of Hedged Item	445
Long-term debt	21,100
Unsecured Debt [Member] | Original Issue Discount [Member]
Debt Instrument [Line Items]
2,015	(17)
2,016	(74)
2,017	(86)
2,018	(97)
2,019	(34)
2020 and thereafter	(1,092)
Derivative, Amount of Hedged Item	0
Long-term debt	(1,400)
Secured Debt [Member]
Debt Instrument [Line Items]
Derivative, Amount of Hedged Item	0	0
Long-term debt	47,761	$ 44,143
Secured Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
2,015	3,731
2,016	10,150
2,017	14,403
2,018	8,913
2,019	5,521
2020 and thereafter	5,043
Derivative, Amount of Hedged Item	0
Long-term debt	$ 47,761

Long-Term Debt (Pledged Assets

Long-Term Debt (Pledged Assets Related to Secured Borrowings And Repurchase Agreement) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Pledged Assets related to secured borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	$ 1,591	$ 786
Pledged Assets, Mortgage assets held for investment	9,746	7,541
Pledged Assets, Investment in operating leases	6,810	6,820
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	70,455	69,190
Secured Debt	49,681	47,867
Short-term borrowings	5,378	7,062
Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	0	786
Pledged Assets, Mortgage assets held for investment	9,746	7,541
Pledged Assets, Investment in operating leases	3,947	4,672
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	40,865	44,345
Secured Debt	23,686	27,134
Pledged assets for Federal Home Loan Bank [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	13,000	10,700
Pledged assets for Federal Reserve Bank [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	3,000	3,200
Secured Debt [Member]
Pledged Assets related to secured borrowings [Line Items]
Short-term borrowings	1,920	3,724
ConsumerAutomobileMember [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	34,186	33,438
ConsumerAutomobileMember [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	9,491	11,263
Commercial Automobile [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	18,122	20,605
Commercial Automobile [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	$ 17,681	$ 20,083

Long-Term Debt (Committed Fundi

Long-Term Debt (Committed Funding Facilities) (Details) - Committed Funding Facilities [Member] - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Outstanding	$ 20,169	$ 18,280
Unused capacity	1,491	3,675
Total capacity	21,660	21,955
Bank Funding Member | Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	3,015	3,250
Unused capacity	235	250
Total capacity	3,250	3,500
Nonbank Funding [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	17,154	15,030
Unused capacity	1,256	3,425
Total capacity	18,410	$ 18,455
Revolving secured funding facilities [Member]
Debt Instrument [Line Items]
Total capacity	21,200
Revolving secured funding facilities 1 year or greater [Member]
Debt Instrument [Line Items]
Total capacity	$ 17,400

Accrued Expenses and Other Li94

Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable	$ 487	$ 298
Accrued Employee Benefits	236	298
Liability for Claims and Claims Adjustment Expense	182	208
Derivative Liability, Fair Value, Gross Liability	176	252
Deferred Revenue	126	151
Other Accrued Liabilities	544	528
Accrued expenses and other liabilities	$ 1,751	$ 1,735

Preferred Stock (Schedule Of Pr

Preferred Stock (Schedule Of Preferred Stock) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Apr. 23, 2015
Schedule of Capitalization, Equity [Line Items]
Preferred stock	$ 813	$ 1,255
Stock Repurchased During Period, Value	(325)
Stock Repurchase and Redemption Premium	1,193
Series A Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred stock	$ 696	$ 1,021
Preferred stock par value (per share)	$ 0.01	$ 0.01
Liquidation preference (per share)	$ 25	$ 25
Preferred Stock, Shares Authorized	40,870,560	40,870,560
Preferred Stock, Shares Issued and Outstanding	27,870,560	40,870,560
Preferred Stock, Dividend Rate, Percentage	8.50%	8.50%
Preferred Stock, Dividend Payment Rate, Variable	Three month LIBOR + 6.243%	Three month LIBOR + 6.243%
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			13,000,000
Stock Repurchase Program, Repurchase Price per Share			$ 26.65
Stock Repurchased During Period, Shares	13,000,000
Preferred Stock Repurchase, Aggregate Liquidation Preference	$ 325
Payments for Repurchase of Preferred Stock and Preference Stock	347
Stock Repurchased During Period, Value	325
Stock Repurchase and Redemption Premium	22
Series G Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred stock	$ 117	$ 234
Preferred stock par value (per share)	$ 0.01	$ 0.01
Liquidation preference (per share)	$ 1,000	$ 1,000
Preferred Stock, Shares Authorized	2,576,601	2,576,601
Preferred Stock, Shares Issued and Outstanding	1,288,301	2,576,601
Preferred Stock, Dividend Rate, Percentage	7.00%	7.00%
Stock Repurchase and Redemption Premium	$ 1,171
Stock Redeemed or Called During Period, Shares	1,288,300
Preferred Stock, Redemption Price Per Share	$ 1,000
Dividends Payable, Amount Per Share	$ 10.50
Preferred Stock Redemption, Aggregate Liquidation Preference	$ 1,288
Preferred Stock, Redemption Amount	1,302
Preferred stock dividends paid for Series G redemption	14
Payments for Repurchase of Redeemable Preferred Stock	$ 117

Accumulated Other Comprehensi96

Accumulated Other Comprehensive Income (Loss) Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax			$ (21)	$ (269)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	$ 62	$ (54)	(35)	148
Ending Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(56)	(121)	(56)	(121)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax			36	65
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent			(21)	(27)
Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	15	38	15	38
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax			7	5
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent			0	1
Ending Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	7	6	7	6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax			(88)	(77)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent			0	4
Ending Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(88)	(73)	(88)	(73)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax			(66)	(276)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	61	(55)	(56)	126
Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (122)	$ (150)	$ (122)	$ (150)

Accumulated Other Comprehensi97

Accumulated Other Comprehensive Income (Loss) Before and After Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	$ 106	$ (15)	$ 53	$ 358
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	6	45	106	129
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	100	(60)	(53)	229
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(41)	5	(21)	(89)
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	(3)	(1)	(39)	(8)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent	(38)	6	18	(81)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	65	(10)	32	269
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	3	44	67	121
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	62	(54)	(35)	148
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(17)	(11)	(33)	(21)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, before Tax	(1)		42	23
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent	(16)		(75)	(44)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	5	4	11	8
Other Comprehensive Income (Loss), Foreign Currency Translation Reclassification Adjustment Realized upon Sale or Liquidation, Tax	0		(20)	(3)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent	5		31	11
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(12)	(7)	(22)	(13)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	(1)		22	20
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(11)		(44)	(33)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period, Before Tax	15	8	31	10
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, before Tax			(4)
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, before Tax			35
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		1		1
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period, Tax	(5)	(3)	(11)	(4)
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, Tax			1
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, Tax			(12)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax		0		0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period Net of Tax	10	5	20	6
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, Net of Tax			(3)
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, Net of Tax			23
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		1		1
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax				(7)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax				3
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax				(4)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	99	(62)	(93)	203
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(38)	7	37	(77)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 61	$ (55)	$ (56)	$ 126

Earnings Per Common Share (Sche

Earnings Per Common Share (Schedule Of Basic And Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Earnings Per Share [Abstract]
Net income (loss) from continuing operations	$ 273	$ 293	$ 621		$ 774
Preferred stock dividends	(38)	(67)	(1,356)	[1]	(200)
Net income (loss) from continuing operations attributable to common shareholders	235	226	(735)		574
Income (loss) from discontinued operations, net of tax	(5)	130	405		199
Net income (loss) attributable to common shareholders	$ 230	$ 356	$ (330)		$ 773
Basic weighted-average common shares outstanding	483,073,329	481,611,138	482,725,342		480,916,395
Diluted weighted-average common shares outstanding	484,399,091	482,506,091	482,725,342		481,545,506
Earnings Per Share, Basic [Abstract]
Net income (loss) from continuing operations, Per Basic Share	$ 0.49	$ 0.47	$ (1.52)		$ 1.19
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	(0.01)	0.27	0.84		0.41
Net (loss) income, Basic	0.48	0.74	(0.68)		1.60
Earnings Per Share, Diluted [Abstract]
Net income (loss) from continuing operations, Per Diluted Share	0.49	0.47	(1.52)		1.19
Income (loss) from discontinued operations, net of tax, Diluted	(0.01)	0.27	0.84		0.41
Net (loss) income, Diluted	$ 0.47	$ 0.74	$ (0.68)		$ 1.60
[1]	Preferred stock dividends for the nine months ended September 30, 2015, include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized. Refer to Note 16 for additional preferred stock information.

Regulatory Capital (Schedule Of

Regulatory Capital (Schedule Of Regulatory Capital Amount And Ratios) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Risk-based Capital required to be well capitalized to risk-weighted assets	4.50%
Tier 1 (to risk-weighted assets), Required minimum	6.00%
Total (to risk-weighted assets), Required minimum	8.00%
Common equity Tier 1 capital conservation buffer	2.50%
assets greater than $50 billion	$ 50,000
Series G Preferred Stock [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preferred Stock Redemption, Aggregate Liquidation Preference	1,288
Series A Preferred Stock [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preferred Stock Repurchase, Aggregate Liquidation Preference	$ 325
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage Of Tier One Common Risk Based Capital to Risk Weighted Assets	5.00%
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 (to risk-weighted assets), Required minimum	6.00%
Total (to risk-weighted assets), Required minimum	8.00%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%
Common Equity Tier 1 Capital	$ 13,444	$ 12,588
Percentage of Common Equity Tier 1 Capital to Risk-weighted Assets	10.05%	9.64%
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk-weighted Assets	4.50%
Tier 1 (to risk-weighted assets), Amount	$ 16,087	$ 16,389
Tier 1 (to risk-weighted assets), Ratio	12.02%	12.55%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%
Total (to risk-weighted assets), Amount	$ 17,327	$ 17,294
Total (to risk-weighted assets), Ratio	12.95%	13.24%
Total (to risk-weighted assets), Well-capitalized minimum	10.00%
Tier 1 leverage (to adjusted average assets), Amount	$ 16,087	$ 16,389
Tier 1 leverage (to adjusted average assets), Ratio	10.43%	10.94%
Ally Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 (to risk-weighted assets), Required minimum	6.00%
Total (to risk-weighted assets), Required minimum	8.00%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	15.00%
Common Equity Tier 1 Capital	$ 16,311	$ 16,022
Percentage of Common Equity Tier 1 Capital to Risk-weighted Assets	17.50%	16.89%
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk-weighted Assets	4.50%
Common Equity Tier 1 Capital Required to be Well Capitalized to Risk-weighted Assets	6.50%
Tier 1 (to risk-weighted assets), Amount	$ 16,311	$ 16,022
Tier 1 (to risk-weighted assets), Ratio	17.50%	16.89%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%
Total (to risk-weighted assets), Amount	$ 16,739	$ 16,468
Total (to risk-weighted assets), Ratio	17.96%	17.36%
Total (to risk-weighted assets), Well-capitalized minimum	10.00%
Tier 1 leverage (to adjusted average assets), Amount	$ 16,311	$ 16,022
Tier 1 leverage (to adjusted average assets), Ratio	15.35%	15.44%
Tier 1 leverage (to adjusted average assets), Well-capitalized minimum	5.00%

Derivative Instruments And H100

Derivative Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Forward Contract Indexed to Issuer's Equity [Line Items]
Cash Collateral Placed with Counterparties	$ 72	$ 221
Securities Collateral Placed with Counterparties	111	15
Cash collateral received from counterparties	129	71
Non-cash collateral received	8	$ 15
Other Assets [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Prepaid Expense	$ 47

Derivative Instruments And H101

Derivative Instruments And Hedging Activities (Fair Value Amounts Of Derivative Instruments Reported On Our Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 299	$ 263
Derivative Liability, Fair Value, Gross Liability	176	252
Notional amount	67,942	81,200
Accrued Interest [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	34	50
Derivative Liability, Fair Value, Gross Liability	9	17
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	184	118
Derivative Liability, Fair Value, Gross Liability	33	7
Notional amount	17,437	18,764
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	182	118
Derivative Liability, Fair Value, Gross Liability	33	7
Notional amount	17,204	18,554
Hedge notional amount associated with debt maturing in five or more years	2,200
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	2	0
Derivative Liability, Fair Value, Gross Liability	0	0
Notional amount	233	210
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Receive-fixed Swaps, Fair Value, Gross Asset	182	97
Receive-fixed Swaps, Fair Value, Gross Liability	0	1
Receive-fixed Swaps, Notional Amount	5,700	4,700
Pay-fixed Swaps, Fair Value, Gross Asset	0	21
Pay-fixed Swaps, Fair Value, Gross Liability	33	6
Pay-fixed Swaps, Notional Amount	11,500	13,900
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	110	138
Derivative Liability, Fair Value, Gross Liability	131	161
Notional amount	50,296	60,847
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	5
Derivative Liability, Fair Value, Gross Liability	1	78
Notional amount	161	1,514
Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	4	2
Derivative Liability, Fair Value, Gross Liability	11	6
Notional amount	48	75
Interest Rate Swap [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	50	40
Derivative Liability, Fair Value, Gross Liability	71	65
Notional amount	6,353	11,979
Foreign Exchange Forward [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	5
Derivative Liability, Fair Value, Gross Liability	1	4
Notional amount	161	304
Futures and Forwards [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	5	4
Derivative Liability, Fair Value, Gross Liability	4	2
Notional amount	7,850	18,886
Written Options [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	56	94
Notional amount	18,007	14,823
Written Options [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	3	3
Notional amount	1	1
Purchased Options [Member] | Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	55	94
Derivative Liability, Fair Value, Gross Liability	0	0
Notional amount	18,086	15,159
Purchased Options [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	4	2
Derivative Liability, Fair Value, Gross Liability	0	0
Notional amount	0	0
Forward Contracts [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	8	3
Notional amount	47	74
Swap [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	74
Notional amount	0	1,210
Other Trading [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	115	145
Derivative Liability, Fair Value, Gross Liability	143	245
Notional amount	$ 50,505	$ 62,436

Derivative Instruments And H102

Derivative Instruments And Hedging Activities (Statement Of Gains and Losses on Derivative Instruments Reported in Statement of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Interest on long-term debt	$ (410)	$ (493)	$ (1,258)	$ (1,576)
Gain (loss) on mortgage and automotive loans, net	(2)	0	45	6
Other income, net of losses	80	78	251	214
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(2)	(5)	(11)	(24)
Gain (Loss) on Equity Forward Contract Not Designated as Hedging Instruments	(4)	(6)	(7)	(6)
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	0	(100)	(130)	(109)
Gain (Loss) on Derivative Instruments, Net, Pretax	(5)	(88)	(132)	(91)
Interest and Fee Income, Loans and Leases	(1,166)	(1,114)	(3,358)	(3,345)
Interest Gain For Qualifying Accounting Hedges Of Debt	24	27	71	89
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1		1
Gains on amortization of deferred basis adjustments on the hedged items	14	38	59	120
Gain (Loss) from Revaulation of Foreign-Denominated Debt or Receivable	1	102	134	112
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	1	23	16	48
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Gain (Loss) Recognized in Earnings on Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest on long-term debt	132	(39)	121	102
Interest and Fee Income, Loans and Leases	34	(28)	50	(22)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Gain (Loss) Recognized in Earnings on Hedged Item [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest on long-term debt	(135)	49	(128)	(90)
Interest and Fee Income, Loans and Leases	(38)	15	(73)	(14)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Gain (loss) Excluded from Earnings on Derivatives [Domain]
Derivative Instruments, Gain (Loss) [Line Items]
Interest and Fee Income, Loans and Leases	18	16	50	43
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on mortgage and automotive loans, net	(2)	0	(2)	0
Other income, net of losses	0	(5)	(9)	(24)
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest on long-term debt	(1)	(108)	(139)	(117)
Other income, net of losses	1	8	9	8
Forward Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other income, net of losses	$ (4)	$ (6)	$ (7)	$ (6)

Derivative Instruments And H103

Derivative Instruments And Hedging Activities (Derivative Instruments Used In Net Investment Hedge Accounting Relationships) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease)	$ (16)	$ (10)	$ (56)	$ (37)
Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	(1)	0	(1)
Cash flow hedges, total interest on long-term debt	0	(1)	0	(1)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	0	1	0	1
Foreign Exchange Contract [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	(4)	0
Net Investment Hedges - Total Other Income, Net of Losses	0	0	(4)	0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 15	$ 8	$ 35	$ 10

Income Taxes (Income Tax Expens

Income Taxes (Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense (benefit) from continuing operations	$ 144	$ 127	$ 341	$ 285
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 180		$ 180

Fair Value (Fair Value Measurme

Fair Value (Fair Value Measurment - Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 18,758	$ 16,137
Available-for-sale, Equity Investment in Any One Industry Did Not Exceed Percentage	13.00%	16.00%
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 18,758	$ 16,137
Mortgage loans held-for-sale, net		3
Retained Interest, Fair Value Disclosure	29	47
Derivative Assets	299	263
Securities Held as Collateral, at Fair Value		15
Assets, Fair Value Disclosure	19,086	16,465
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(176)	(252)
Liabilities, Fair Value Disclosure	(176)	(252)
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(164)	(168)
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(1)	(78)
Fair Value, Measurements, Recurring [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(11)	(6)
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	17,773	15,231
Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,809	1,178
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	651	406
Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	184	232
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	11,614	10,425
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	517	253
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,951	1,991
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,047	746
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	985	906
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	292	256
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	3	5
Fair Value, Measurements, Recurring [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	4	2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	2,109	1,137
Mortgage loans held-for-sale, net		0
Retained Interest, Fair Value Disclosure	0	0
Derivative Assets	9	6
Securities Held as Collateral, at Fair Value		0
Assets, Fair Value Disclosure	2,118	1,143
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(7)	(4)
Liabilities, Fair Value Disclosure	(7)	(4)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(4)	(2)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(3)	(2)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,124	231
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,114	217
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	10	14
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	985	906
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	5	4
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	4	2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16,649	15,000
Mortgage loans held-for-sale, net		0
Retained Interest, Fair Value Disclosure	0	0
Derivative Assets	290	257
Securities Held as Collateral, at Fair Value		15
Assets, Fair Value Disclosure	16,939	15,272
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(169)	(248)
Liabilities, Fair Value Disclosure	(169)	(248)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(160)	(166)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(1)	(78)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(8)	(4)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16,649	15,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	695	961
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	651	406
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	174	218
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	11,614	10,425
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	517	253
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,951	1,991
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,047	746
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	287	252
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	3	5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Mortgage loans held-for-sale, net		3
Retained Interest, Fair Value Disclosure	29	47
Derivative Assets	0	0
Securities Held as Collateral, at Fair Value		0
Assets, Fair Value Disclosure	29	50
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	$ 0	$ 0

Fair Value (Fair Value Measurem

Fair Value (Fair Value Measurement - Reconciliation of Level 3 Assets And Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 0	$ 0	$ 0	$ 0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance	36	74	50	99
Net realized/unrealized gains (losses) included in earnings, Assets	1	4	9	9
Net realized/unrealized gains (losses) included in other comprehensive income, Assets	0	0	0	0
Purchases, Assets	0	0	0	0
Sales, Assets	(4)	0	(4)	0
Issuances, Assets	1	0	2	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(5)	(17)	(28)	(50)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	0	0	3
Fair Value, Assets, Ending balance	29	61	29	61
Loans Held-for-Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance	4		3
Net realized/unrealized gains (losses) included in earnings, Assets	0		1
Net realized/unrealized gains (losses) included in other comprehensive income, Assets	0		0
Purchases, Assets	0		0
Sales, Assets	(4)		(4)
Issuances, Assets	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		0
Fair Value, Assets, Ending balance	0		0
Retained Interest [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance	32	74	47	100
Net realized/unrealized gains (losses) included in earnings, Assets	1	4	8	9
Net realized/unrealized gains (losses) included in other comprehensive income, Assets	0	0	0	0
Purchases, Assets	0	0	0	0
Sales, Assets	0	0	0	0
Issuances, Assets	1	0	2	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(5)	(17)	(28)	(48)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	0	0	0
Fair Value, Assets, Ending balance	$ 29	61	$ 29	61
Interest Rate Contract [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Net Derivative Asset (Liability), Beginning balance				(1)
Gain (Loss) Included in Earnings, Net Derivative Asset (Liability)				0
Gain (Loss) Included in Other Comprehensive Income (Loss), Net Derivative Asset (Liability)				0
Purchases, Net Derivative Asset (Liability)				0
Sales, Net Derivative Asset (Liability)				0
Issuances, Net Derivative Asset (Liability)				0
Settlements, Net Derivative Asset (Liability)				(2)
Transfers out of Level 3, Net Derivative Asset (Liability)				3
Fair Value, Net Derivative Asset (Liability), Ending balance		$ 0		$ 0

Fair Value (Fair Value Measu107

Fair Value (Fair Value Measurement - Nonrecurring Basis) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			$ 37	$ 2,003
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0	485
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			37	$ 1,554
Fair Value, Measurements, Nonrecurring [Member] | Commercial And Industrial Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			37
Lower of cost or fair value or valuation reserve allowance			0
Fair Value, Measurements, Nonrecurring [Member] | Loans Held-for-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			37
Lower of cost or fair value or valuation reserve allowance			0
Fair Value, Measurements, Nonrecurring [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	$ 16	$ 16	13
Lower of cost or fair value or valuation reserve allowance	(1)	(1)	(4)
Fair Value, Measurements, Nonrecurring [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	37	37	30
Lower of cost or fair value or valuation reserve allowance	(14)	(14)	(15)
Fair Value, Measurements, Nonrecurring [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	53	53	43
Lower of cost or fair value or valuation reserve allowance	(15)	(15)	(19)
Fair Value, Measurements, Nonrecurring [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	8	8	9
Lower of cost or fair value or valuation reserve allowance	(3)	(3)	(3)
Fair Value, Measurements, Nonrecurring [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	2	2	2
Lower of cost or fair value or valuation reserve allowance	0	0	0
Total Income (Loss) Included In Earnings	0	0
Fair Value, Measurements, Nonrecurring [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	63	63	91
Lower of cost or fair value or valuation reserve allowance	(18)	(18)	(22)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial And Industrial Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Loans Held-for-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial And Industrial Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Loans Held-for-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial And Industrial Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			37
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Loans Held-for-Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, net			37
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	16	16	13
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	37	37	30
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	53	53	43
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	8	8	9
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	2	2	2
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 63	$ 63	$ 91

Fair Value (Fair Value of Finan

Fair Value (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	$ 37	$ 2,003
Total finance receivables and loans, net	106,973	98,971
Nonmarketable equity securities	313	271
Deposit liabilities	64,041	58,222
Short-term borrowings	5,378	7,062
Long-term debt	67,461	66,558
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	0	0
Total finance receivables and loans, net	0	0
Nonmarketable equity securities	0	0
Deposit liabilities	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	0	485
Total finance receivables and loans, net	0	0
Nonmarketable equity securities	287	246
Deposit liabilities	0	0
Short-term borrowings	0	0
Long-term debt	21,384	25,224
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	37	1,554
Total finance receivables and loans, net	107,846	99,430
Nonmarketable equity securities	43	33
Deposit liabilities	64,728	58,777
Short-term borrowings	5,378	7,063
Long-term debt	47,762	44,084
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	37	2,003
Total finance receivables and loans, net	106,973	98,971
Nonmarketable equity securities	313	271
Deposit liabilities	64,041	58,222
Short-term borrowings	5,378	7,062
Long-term debt	67,461	66,558
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale, net	37	2,039
Total finance receivables and loans, net	107,846	99,430
Nonmarketable equity securities	330	279
Deposit liabilities	64,728	58,777
Short-term borrowings	5,378	7,063
Long-term debt	$ 69,146	$ 69,308

Offsetting Assets and Liabil109

Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 299	$ 263
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(115)	(107)
Derivative, Collateral, Right to Reclaim Cash	(122)	(68)
Derivative Liability, Fair Value, Gross Liability	(176)	(252)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	115	107
Derivative, Collateral, Obligation to Return Cash	11	54
Securities Sold under Agreements to Repurchase, Gross	(1,520)	(774)
Non-cash derivative collateral pledged to us is not recorded on our Condensed Consolidated Balance Sheet unless certain conditions are met.	8
Net Asset [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	298	216
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(114)	(60)
Derivative, Collateral, Right to Reclaim Cash	(122)	(68)
Derivative assets in net liability positions [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	47
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(1)	(47)
Derivative, Collateral, Right to Reclaim Cash	0	0
Net liability [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	(54)	(188)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	1	47
Derivative, Collateral, Obligation to Return Cash	11	54
Derivative liabilities in net asset positions [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	(114)	(60)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	114	60
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative liabilities with no offsetting arrangements [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	(8)	(4)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Securities sold under agreement to repurchase [Member]
Derivative [Line Items]
Securities Sold under Agreements to Repurchase, Gross	(1,520)	(774)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	0	0
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral, Net	(1,520)	(774)
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	0	0
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash	1,520	774
Securities Sold under Agreements to Repurchase	0	0
Assets, Total [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	299	263
Derivative Assets	62	88
Assets, Total [Member] | Net Asset [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	298	216
Derivative Assets	62	88
Assets, Total [Member] | Derivative assets in net liability positions [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	1	47
Derivative Assets	0	0
Liabilities, Total [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	(176)	(252)
Derivative Liability	(50)	(91)
Gross Amounts of Recognized Liabilities	(1,696)	(1,026)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet	(1,696)	(1,026)
Gross Amounts Not Offset Against Collateral	115	107
Obligation to Return Cash	1,531	828
Net Amount	(50)	(91)
Liabilities, Total [Member] | Net liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	(54)	(188)
Derivative Liability	(42)	(87)
Liabilities, Total [Member] | Derivative liabilities in net asset positions [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	(114)	(60)
Derivative Liability	0	0
Liabilities, Total [Member] | Derivative liabilities with no offsetting arrangements [Member]
Derivative [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	(8)	(4)
Derivative Liability	$ (8)	$ (4)

Segment And Geographic Infor110

Segment And Geographic Information (Financial Information Operating Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net financing revenue (loss)	$ 970	$ 889	$ 2,736	$ 2,576
Other revenue	332	375	786	1,061
Total net revenue (loss)	1,302	1,264	3,522	3,637
Provision for loan losses	211	102	467	302
Total noninterest expense	674	742	2,093	2,276
Income (loss) from continuing operations before income tax expense	417	420	962	1,059
Assets	156,105	149,195	156,105	149,195	$ 151,828
Net Interest Income (Loss) after Provision for Loan Losses	759	787	2,300	2,300
Automotive finance operations [Member]
Segment Reporting Information [Line Items]
Net financing revenue (loss)	870	850	2,529	2,554
Other revenue	63	69	170	195
Total net revenue (loss)	933	919	2,699	2,749
Provision for loan losses	201	109	460	367
Total noninterest expense	385	395	1,160	1,167
Income (loss) from continuing operations before income tax expense	347	415	1,079	1,215
Assets	113,843	110,937	113,843	110,937
Insurance Operations [Member]
Segment Reporting Information [Line Items]
Net financing revenue (loss)	16	16	42	47
Other revenue	233	287	769	849
Total net revenue (loss)	249	303	811	896
Provision for loan losses	0	0	0	0
Total noninterest expense	209	243	678	785
Income (loss) from continuing operations before income tax expense	40	60	133	111
Assets	6,997	7,178	6,997	7,178
Mortgage Operations [Member]
Segment Reporting Information [Line Items]
Net financing revenue (loss)	20	9	50	35
Other revenue	10	0	84	13
Total net revenue (loss)	30	9	134	48
Provision for loan losses	6	(7)	4	(55)
Total noninterest expense	17	19	46	62
Income (loss) from continuing operations before income tax expense	7	(3)	84	41
Assets	9,772	7,402	9,772	7,402
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net financing revenue (loss)	64	14	115	(60)
Other revenue	26	19	(237)	4
Total net revenue (loss)	90	33	(122)	(56)
Provision for loan losses	4	0	3	(10)
Total noninterest expense	63	85	209	262
Income (loss) from continuing operations before income tax expense	23	(52)	(334)	(308)
Assets	25,493	23,678	25,493	23,678
Corporate Finance Operations [Member]
Segment Reporting Information [Line Items]
Assets	$ 2,300	$ 1,700	$ 2,300	$ 1,700

Segment And Geographic Infor111

Segment And Geographic Information (Information Concerning Principal Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	$ 1,302	$ 1,264	$ 3,522	$ 3,637
Income (loss) from continuing operations before income tax expense	417	420	962	1,059
Net income (loss)	268	423	1,026	973
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	24	31	77	97
Income (loss) from continuing operations before income tax expense	12	6	40	36
Net income (loss)	9	39	510	147
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	24	31	76	95
Income (loss) from continuing operations before income tax expense	11	7	35	36
Net income (loss)	9	9	30	55
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	0	0	1	2
Income (loss) from continuing operations before income tax expense	1	(1)	5	0
Net income (loss)	0	1	28	5
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)			0	0
Income (loss) from continuing operations before income tax expense			0	0
Net income (loss)			0	(8)
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	0	0	0	0
Income (loss) from continuing operations before income tax expense	0	0	0	0
Net income (loss)	0	29	452	95
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	1,278	1,233	3,445	3,540
Income (loss) from continuing operations before income tax expense	405	414	922	1,023
Net income (loss)	259	384	516	826
Amortization of Debt Discount (Premium)	$ 16	$ 51	$ 45	$ 149

Parent And Guarantor Consoli112

Parent And Guarantor Consolidating Financial Statements (Schedule of Consolidating Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	$ 1,166	$ 1,114	$ 3,358	$ 3,345
Interest on loans held-for-sale	2	0	40	1
Interest and dividends on available-for-sale investment securities	102	94	283	282
Interest-bearing cash	2	2	6	6
Operating leases	830	899	2,586	2,653
Total financing revenue and other interest income	2,102	2,109	6,273	6,287
Interest on deposits	181	166	530	495
Interest on short-term borrowings	13	12	36	40
Interest on long-term debt	410	493	1,258	1,576
Interest Expense, Debt	0	0	0	0
Total interest expense	604	671	1,824	2,111
Depreciation expense on operating lease assets	528	549	1,713	1,600
Net financing revenue (loss)	970	889	2,736	2,576
Bank Subsidiary		0	0	0
Nonbank subsidiaries	0	0	0	0
Servicing fees	12	6	32	22
Insurance premiums and service revenue earned	236	246	706	736
Gain (loss) on mortgage and automotive loans, net	(2)	0	45	6
Gains (Losses) on Extinguishment of Debt	0	0	(354)	(46)
Other gain (loss) on investments, net	6	45	106	129
Other income, net of losses	80	78	251	214
Total other revenue	332	375	786	1,061
Total net revenue (loss)	1,302	1,264	3,522	3,637
Provision for loan losses	211	102	467	302
Compensation and benefits expense	235	241	726	710
Insurance losses and loss adjustment expenses	61	97	239	353
Other operating expenses	378	404	1,128	1,213
Total noninterest expense	674	742	2,093	2,276
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	417	420	962	1,059
Income tax expense (benefit) from continuing operations	144	127	341	285
Net income (loss) from continuing operations	273	293	621	774
Income (loss) from discontinued operations, net of tax	(5)	130	405	199
Undistributed income of bank subsidiaries	0	0	0	0
Undistributed income of nonbank subsidiaries	0	0	0	0
Net income (loss)	268	423	1,026	973
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	61	(55)	(56)	126
Comprehensive income (loss)	329	368	970	1,099
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	(33)	16	(45)	(2)
Interest on loans held-for-sale	0		0	0
Interest and dividends on available-for-sale investment securities	0	0	0	0
Interest-bearing cash	0	0	1	1
Operating leases	1	1	1	269
Total financing revenue and other interest income	(29)	27	(28)	294
Interest on deposits	3	3	8	11
Interest on short-term borrowings	10	10	30	32
Interest on long-term debt	272	350	856	1,143
Interest Expense, Debt	3	22	28	68
Total interest expense	288	385	922	1,254
Depreciation expense on operating lease assets	1	(4)	1	164
Net financing revenue (loss)	(318)	(354)	(951)	(1,124)
Bank Subsidiary		150	525	1,650
Nonbank subsidiaries	494	141	980	462
Servicing fees	289	6	846	22
Insurance premiums and service revenue earned	0	0	0	0
Gain (loss) on mortgage and automotive loans, net	(1)	(2)	(9)	(2)
Gains (Losses) on Extinguishment of Debt			(353)	(46)
Other gain (loss) on investments, net	0	0	0	0
Other income, net of losses	78	206	199	591
Total other revenue	366	210	683	565
Total net revenue (loss)	542	147	1,237	1,553
Provision for loan losses	48	88	111	165
Compensation and benefits expense	138	153	431	441
Insurance losses and loss adjustment expenses	0	0	0	0
Other operating expenses	315	252	935	648
Total noninterest expense	453	405	1,366	1,089
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	41	(346)	(240)	299
Income tax expense (benefit) from continuing operations	(30)	(68)	(231)	(309)
Net income (loss) from continuing operations	71	(278)	(9)	608
Income (loss) from discontinued operations, net of tax	(5)	127	367	172
Undistributed income of bank subsidiaries	254	150	302	(802)
Undistributed income of nonbank subsidiaries	(52)	424	366	995
Net income (loss)	268	423	1,026	973
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	61	(55)	(56)	126
Comprehensive income (loss)	329	368	970	1,099
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	0	0	0	0
Interest on loans held-for-sale	0		0	0
Interest and dividends on available-for-sale investment securities	0	0	0	0
Interest-bearing cash	0	0	0	0
Operating leases	0	0	0	0
Total financing revenue and other interest income	0	0	0	0
Interest on deposits	0	0	0	0
Interest on short-term borrowings	0	0	0	0
Interest on long-term debt	0	0	0	0
Interest Expense, Debt	0	0	0	0
Total interest expense	0	0	0	0
Depreciation expense on operating lease assets	0	0	0	0
Net financing revenue (loss)	0	0	0	0
Bank Subsidiary		150	525	1,650
Nonbank subsidiaries	0	0	0	0
Servicing fees	0	0	0	0
Insurance premiums and service revenue earned	0	0	0	0
Gain (loss) on mortgage and automotive loans, net	0	0	0	0
Gains (Losses) on Extinguishment of Debt			0	0
Other gain (loss) on investments, net	0	0	0	0
Other income, net of losses	0	0	0	0
Total other revenue	0	0	0	0
Total net revenue (loss)	0	150	525	1,650
Provision for loan losses	0	0	0	0
Compensation and benefits expense	0	0	0	0
Insurance losses and loss adjustment expenses	0	0	0	0
Other operating expenses	0	0	0	0
Total noninterest expense	0	0	0	0
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	0	150	525	1,650
Income tax expense (benefit) from continuing operations	0	0	0	0
Net income (loss) from continuing operations	0	150	525	1,650
Income (loss) from discontinued operations, net of tax	0	0	0	0
Undistributed income of bank subsidiaries	254	150	302	(802)
Undistributed income of nonbank subsidiaries	(1)	(2)	(1)	(2)
Net income (loss)	253	298	826	846
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	65	(3)	40	116
Comprehensive income (loss)	318	295	866	962
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	1,199	1,098	3,403	3,347
Interest on loans held-for-sale	2		40	1
Interest and dividends on available-for-sale investment securities	102	94	283	282
Interest-bearing cash	2	2	5	5
Operating leases	829	898	2,585	2,384
Total financing revenue and other interest income	2,137	2,114	6,344	6,087
Interest on deposits	178	163	522	484
Interest on short-term borrowings	3	2	6	8
Interest on long-term debt	138	143	402	433
Interest Expense, Debt	3	10	15	26
Total interest expense	322	318	945	951
Depreciation expense on operating lease assets	527	553	1,712	1,436
Net financing revenue (loss)	1,288	1,243	3,687	3,700
Bank Subsidiary		0	0	0
Nonbank subsidiaries	0	0	0	0
Servicing fees	210	0	621	0
Insurance premiums and service revenue earned	236	246	706	736
Gain (loss) on mortgage and automotive loans, net	(1)	2	54	8
Gains (Losses) on Extinguishment of Debt			(1)	0
Other gain (loss) on investments, net	6	45	106	129
Other income, net of losses	119	373	398	1,007
Total other revenue	570	666	1,884	1,880
Total net revenue (loss)	1,858	1,909	5,571	5,580
Provision for loan losses	163	14	356	137
Compensation and benefits expense	212	199	634	604
Insurance losses and loss adjustment expenses	61	97	239	353
Other operating expenses	552	542	1,635	1,614
Total noninterest expense	825	838	2,508	2,571
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	870	1,057	2,707	2,872
Income tax expense (benefit) from continuing operations	174	195	572	594
Net income (loss) from continuing operations	696	862	2,135	2,278
Income (loss) from discontinued operations, net of tax	0	3	38	27
Undistributed income of bank subsidiaries	0	0	0	0
Undistributed income of nonbank subsidiaries	0	0	0	0
Net income (loss)	696	865	2,173	2,305
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	55	(50)	(64)	124
Comprehensive income (loss)	751	815	2,109	2,429
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	0	0	0	0
Interest on loans held-for-sale	0		0	0
Interest and dividends on available-for-sale investment securities	0	0	0	0
Interest-bearing cash	0	0	0	0
Operating leases	0	0	0	0
Total financing revenue and other interest income	(6)	(32)	(43)	(94)
Interest on deposits	0	0	0	0
Interest on short-term borrowings	0	0	0	0
Interest on long-term debt	0	0	0	0
Interest Expense, Debt	(6)	(32)	(43)	(94)
Total interest expense	(6)	(32)	(43)	(94)
Depreciation expense on operating lease assets	0	0	0	0
Net financing revenue (loss)	0	0	0	0
Bank Subsidiary		(300)	(1,050)	(3,300)
Nonbank subsidiaries	(494)	(141)	(980)	(462)
Servicing fees	(487)	0	(1,435)	0
Insurance premiums and service revenue earned	0	0	0	0
Gain (loss) on mortgage and automotive loans, net	0	0	0	0
Gains (Losses) on Extinguishment of Debt			0	0
Other gain (loss) on investments, net	0	0	0	0
Other income, net of losses	(117)	(501)	(346)	(1,384)
Total other revenue	(604)	(501)	(1,781)	(1,384)
Total net revenue (loss)	(1,098)	(942)	(3,811)	(5,146)
Provision for loan losses	0	0	0	0
Compensation and benefits expense	(115)	(111)	(339)	(335)
Insurance losses and loss adjustment expenses	0	0	0	0
Other operating expenses	(489)	(390)	(1,442)	(1,049)
Total noninterest expense	(604)	(501)	(1,781)	(1,384)
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	(494)	(441)	(2,030)	(3,762)
Income tax expense (benefit) from continuing operations	0	0	0	0
Net income (loss) from continuing operations	(494)	(441)	(2,030)	(3,762)
Income (loss) from discontinued operations, net of tax	0	0	0	0
Undistributed income of bank subsidiaries	(508)	(300)	(604)	1,604
Undistributed income of nonbank subsidiaries	53	(422)	(365)	(993)
Net income (loss)	(949)	(1,163)	(2,999)	(3,151)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(120)	53	24	(240)
Comprehensive income (loss)	(1,069)	(1,110)	(2,975)	(3,391)
Affiliated Entity [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	0	0	0	0
Interest-bearing cash	0	0	0	0
Affiliated Entity [Member] | Parent [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	3	10	15	26
Interest-bearing cash	0	0	0	0
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	0	0	0	0
Interest-bearing cash	0	0	0	0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	1	21	22	64
Interest-bearing cash	2	1	6	4
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Interest and fees on finance receivables and loans	(4)	(31)	(37)	(90)
Interest-bearing cash	$ (2)	$ (1)	$ (6)	$ (4)

Parent And Guarantor Consoli113

Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	$ 1,666		$ 1,348
Interest-bearing Deposits in Banks and Other Financial Institutions	3,561		4,228
Total cash and cash equivalents	5,227		5,576	$ 5,699		$ 5,531
Investment securities	18,758		16,137
Loans held-for-sale, net	37		2,003
Finance receivables and loans, net	107,991		99,948
Loans to bank subsidiary			0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	(1,018)	$ (974)	(977)	(1,113)	$ (1,171)	(1,208)
Total finance receivables and loans, net	106,973		98,971
Investment in operating leases, net	17,292		19,510
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,794		1,695
Other Assets	6,024		7,302
Assets of operations held-for-sale	0		634
Total assets	156,105		151,828	149,195
Noninterest-bearing deposit liabilities	91		64
Interest-bearing deposit liabilities	63,950		58,158
Total deposit liabilities	64,041		58,222
Short-term borrowings	5,378		7,062
Long-term debt	67,461		66,558
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	437		477
Unearned insurance premiums and service revenue	2,438		2,375
Accrued expenses and other liabilities	1,751		1,735
Total liabilities	141,506		136,429
Total equity	14,599		15,399	15,190		14,208
Total liabilities and equity	156,105		151,828
Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	797		986
Interest-bearing Deposits in Banks and Other Financial Institutions	1,201		1,300
Total cash and cash equivalents	1,998		2,286	2,232		2,930
Investment securities	0		0
Loans held-for-sale, net	0		3
Finance receivables and loans, net	3,818		4,225
Loans to bank subsidiary			625
Loans to nonbank subsidiary	1,781		3,500
Allowance for loan losses	(86)		(102)
Total finance receivables and loans, net	5,513		8,248
Investment in operating leases, net	92		0
Receivables from bank subsidiary	338		219
Receivables from nonbank subsidiary	218		267
Investment in bank subsidiaries	16,296		15,967
Investment in nonbank subsidiaries	10,931		11,559
Premiums receivable and other insurance assets	0		0
Other Assets	4,932		4,889
Assets of operations held-for-sale			634
Total assets	40,318		44,072
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	248		319
Total deposit liabilities	248		319
Short-term borrowings	3,458		3,338
Long-term debt	19,820		21,199
Debt Payable To Nonbank Subsidiaries	1,268		2,385
Payables to Bank Subsidiaries	24		94
Payables to Nonbank Subsidiaries	374		454
Interest payable	223		316
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	304		568
Total liabilities	25,719		28,673
Total equity	14,599		15,399
Total liabilities and equity	40,318		44,072
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Total cash and cash equivalents	0		0	0		37
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary			0
Loans to nonbank subsidiary	0		0
Allowance for loan losses	0		0
Total finance receivables and loans, net	0		0
Investment in operating leases, net	0		0
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	16,296		15,967
Investment in nonbank subsidiaries	12		12
Premiums receivable and other insurance assets	0		0
Other Assets	0		0
Assets of operations held-for-sale			0
Total assets	16,308		15,979
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Total deposit liabilities	0		0
Short-term borrowings	0		0
Long-term debt	0		0
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	82		82
Total liabilities	82		82
Total equity	16,226		15,897
Total liabilities and equity	16,308		15,979
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	869		362
Interest-bearing Deposits in Banks and Other Financial Institutions	2,360		2,928
Total cash and cash equivalents	3,951		3,905	3,880		2,974
Investment securities	18,758		16,137
Loans held-for-sale, net	37		2,000
Finance receivables and loans, net	104,173		95,723
Loans to bank subsidiary			0
Loans to nonbank subsidiary	546		1,770
Allowance for loan losses	(932)		(875)
Total finance receivables and loans, net	103,787		96,618
Investment in operating leases, net	17,200		19,510
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	242		393
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,816		1,717
Other Assets	3,971		4,879
Assets of operations held-for-sale			0
Total assets	149,762		145,159
Noninterest-bearing deposit liabilities	91		64
Interest-bearing deposit liabilities	63,702		57,839
Total deposit liabilities	63,793		57,903
Short-term borrowings	1,920		3,724
Long-term debt	47,641		45,359
Debt Payable To Nonbank Subsidiaries	1,781		4,125
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	420		354
Interest payable	214		161
Unearned insurance premiums and service revenue	2,438		2,375
Accrued expenses and other liabilities	4,245		3,551
Total liabilities	122,452		117,552
Total equity	27,310		27,607
Total liabilities and equity	149,762		145,159
Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Total cash and cash equivalents	(722)		(615)	$ (413)		$ (410)
Investment securities	0		0
Loans held-for-sale, net	0		0
Finance receivables and loans, net	0		0
Loans to bank subsidiary			(625)
Loans to nonbank subsidiary	(2,327)		(5,270)
Allowance for loan losses	0		0
Total finance receivables and loans, net	(2,327)		(5,895)
Investment in operating leases, net	0		0
Receivables from bank subsidiary	(338)		(219)
Receivables from nonbank subsidiary	(460)		(660)
Investment in bank subsidiaries	(32,592)		(31,934)
Investment in nonbank subsidiaries	(10,943)		(11,571)
Premiums receivable and other insurance assets	(22)		(22)
Other Assets	(2,879)		(2,466)
Assets of operations held-for-sale			0
Total assets	(50,283)		(53,382)
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Total deposit liabilities	0		0
Short-term borrowings	0		0
Long-term debt	0		0
Debt Payable To Nonbank Subsidiaries	(3,049)		(6,510)
Payables to Bank Subsidiaries	(24)		(94)
Payables to Nonbank Subsidiaries	(794)		(808)
Interest payable	0		0
Unearned insurance premiums and service revenue	0		0
Accrued expenses and other liabilities	(2,880)		(2,466)
Total liabilities	(6,747)		(9,878)
Total equity	(43,536)		(43,504)
Total liabilities and equity	(50,283)		(53,382)
Fair Value Option Election, Fair Value [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Finance receivables and loans, net	107,991		99,948
Affiliated Entity [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	722		615
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ (722)		$ (615)

Parent And Guarantor Consoli114

Parent And Guarantor Consolidating Financial Statements (Schedule Of Condensed Consolidating Statement of Cash Flow) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 3,954	$ 2,458
Purchases of available-for-sale securities	(10,011)	(4,117)
Proceeds from sales of available-for-sale securities	4,408	2,974
Proceeds from maturities of available-for-sale securities	3,141	1,877
Net (increase) decrease in finance receivables and loans	(9,175)	(1,267)
Proceeds from Sale of Loans Held-for-sale	2,665	1,557
Net (increase) decrease in operating lease assets	432	(3,265)
Capital contributions to subsidiaries	0	0
Returns of contributed capital	0	0
Proceeds from sale of business units, net	1,049	47
Increase (Decrease) in Restricted Cash	489	2,128
Other, net	(17)	71
Net cash (used in) provided by investing activities	(7,019)	5
Net change in short-term borrowings	(1,692)	(3,298)
Net increase in bank deposits	5,819	3,501
Proceeds from issuance of long-term debt	23,844	18,942
Repayments of long-term debt	(23,454)	(21,239)
Net Change in Debt, Intercompany	0	0
Repurchase and Redemption of Preferred Stock	(442)	0
Dividends paid	(1,356)	(200)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash provided by (used in) financing activities	2,719	(2,294)
Effect of exchange-rate changes on cash and cash equivalents	(3)	(1)
Cash and Cash Equivalents, Period Increase (Decrease)	(349)	168
Cash and cash equivalents at beginning of period	5,576	5,531
Cash and cash equivalents at end of period	5,227	5,699
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	51	544
Purchases of available-for-sale securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities of available-for-sale securities	0	0
Net (increase) decrease in finance receivables and loans	398	1,669
Proceeds from Sale of Loans Held-for-sale	0	0
Net (increase) decrease in operating lease assets	(94)	146
Capital contributions to subsidiaries	(228)	(744)
Returns of contributed capital	881	1,251
Proceeds from sale of business units, net	1,049	46
Increase (Decrease) in Restricted Cash	(12)	0
Other, net	(29)	(17)
Net cash (used in) provided by investing activities	4,357	2,247
Net change in short-term borrowings	120	151
Net increase in bank deposits	(72)	(72)
Proceeds from issuance of long-term debt	4,037	2,310
Repayments of long-term debt	(5,866)	(5,535)
Net Change in Debt, Intercompany	(1,117)	(143)
Repurchase and Redemption of Preferred Stock	(442)
Dividends paid	(1,356)	(200)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash provided by (used in) financing activities	(4,696)	(3,489)
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(288)	(698)
Cash and cash equivalents at beginning of period	2,286	2,930
Cash and cash equivalents at end of period	1,998	2,232
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	525	1,639
Purchases of available-for-sale securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities of available-for-sale securities	0	0
Net (increase) decrease in finance receivables and loans	0	0
Proceeds from Sale of Loans Held-for-sale	0	0
Net (increase) decrease in operating lease assets	0	0
Capital contributions to subsidiaries	(1)	0
Returns of contributed capital	0	0
Proceeds from sale of business units, net	0	0
Increase (Decrease) in Restricted Cash	0	0
Other, net	0	0
Net cash (used in) provided by investing activities	(1)	0
Net change in short-term borrowings	0	0
Net increase in bank deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	0	0
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	(525)	(1,676)
Capital contributions from parent	1	0
Net cash provided by (used in) financing activities	(524)	(1,676)
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	(37)
Cash and cash equivalents at beginning of period	0	37
Cash and cash equivalents at end of period	0	0
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	5,408	4,036
Purchases of available-for-sale securities	(10,011)	(4,117)
Proceeds from sales of available-for-sale securities	4,408	2,974
Proceeds from maturities of available-for-sale securities	3,141	1,877
Net (increase) decrease in finance receivables and loans	(9,573)	(2,936)
Proceeds from Sale of Loans Held-for-sale	2,665	1,557
Net (increase) decrease in operating lease assets	526	(3,411)
Capital contributions to subsidiaries	1	0
Returns of contributed capital	0	0
Proceeds from sale of business units, net	0	1
Increase (Decrease) in Restricted Cash	501	2,128
Other, net	12	88
Net cash (used in) provided by investing activities	(7,105)	(1,692)
Net change in short-term borrowings	(1,812)	(3,449)
Net increase in bank deposits	5,891	3,573
Proceeds from issuance of long-term debt	19,807	16,632
Repayments of long-term debt	(17,588)	(15,704)
Net Change in Debt, Intercompany	(2,393)	104
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	(2,386)	(3,337)
Capital contributions from parent	227	744
Net cash provided by (used in) financing activities	1,746	(1,437)
Effect of exchange-rate changes on cash and cash equivalents	(3)	(1)
Cash and Cash Equivalents, Period Increase (Decrease)	46	906
Cash and cash equivalents at beginning of period	3,905	2,974
Cash and cash equivalents at end of period	3,951	3,880
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(2,030)	(3,761)
Purchases of available-for-sale securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities of available-for-sale securities	0	0
Net (increase) decrease in finance receivables and loans	0	0
Proceeds from Sale of Loans Held-for-sale	0	0
Net (increase) decrease in operating lease assets	0	0
Capital contributions to subsidiaries	228	744
Returns of contributed capital	(881)	(1,251)
Proceeds from sale of business units, net	0	0
Increase (Decrease) in Restricted Cash	0	0
Other, net	0	0
Net cash (used in) provided by investing activities	(4,270)	(550)
Net change in short-term borrowings	0	0
Net increase in bank deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	3,510	39
Repurchase and Redemption of Preferred Stock	0
Dividends paid	0	0
Dividends paid and returns of contributed capital, Intercompany	2,911	5,013
Capital contributions from parent	(228)	(744)
Net cash provided by (used in) financing activities	6,193	4,308
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(107)	(3)
Cash and cash equivalents at beginning of period	(615)	(410)
Cash and cash equivalents at end of period	(722)	(413)
Affiliated Entity [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0	0
Affiliated Entity [Member] | Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	2,392	(104)
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	0	0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	1,225	147
Affiliated Entity [Member] | Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net (increase) decrease in finance receivables and loans	$ (3,617)	$ (43)

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 21, 2015	Sep. 30, 2015
Series G Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share		$ 10.50
Subsequent Event [Member] | Series G Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share	$ 17.31
Dividends Payable	$ 22
Subsequent Event [Member] | Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share	$ 0.53
Dividends Payable	$ 15