XML 88 R74.htm IDEA: XBRL DOCUMENT
v3.20.2

Finance Receivables and Loans, Net (Schedule of Pass And Criticized Credit Quality Indicators of Finance Receivables) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | $ 118,234 | $ 128,231 | $ 129,210
Commercial portfolio segment |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 27,869 | 38,307 | $ 38,512
Commercial portfolio segment | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net |  | 34,080 |
Commercial portfolio segment | Criticized |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net |  | 4,227 |
Commercial portfolio segment | Automotive loan |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 17,755 | 28,332 |
Commercial portfolio segment | Automotive loan | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 15,237 | 25,235 |
Commercial portfolio segment | Automotive loan | Criticized |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net |  | 3,097 |
Commercial portfolio segment | Other loan |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 5,315 | 5,014 |
Commercial portfolio segment | Other loan | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 3,887 | 4,225 |
Commercial portfolio segment | Other loan | Criticized |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net |  | 789 |
Commercial portfolio segment | Real estate-backed loan |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | 4,799 | 4,961 |
Commercial portfolio segment | Real estate-backed loan | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net | $ 4,453 | 4,620 |
Commercial portfolio segment | Real estate-backed loan | Criticized |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Finance receivables and loans, net |  | $ 341 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_CriticizedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ally_OtherloanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |