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Debt - Narrative (Details) - USD ($) $ in Billions | 1 Months Ended | 6 Months Ended
--- | --- | ---
May 31, 2020 | Apr. 30, 2020 | Jun. 30, 2020
Unsecured Debt [Member] | Line of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds borrowed |  |  | $ 2.0
Debt term | 3 years | 3 years |
Aggregate borrowing capacity | $ 2.0 | $ 3.0 |
Dividend restriction covenant, amount outstanding |  |  | 5.0
Unsecured Debt [Member] | Line of Credit [Member] | Three Year Revolving Credit Facility April 2022 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate borrowing capacity |  | $ 3.6 |
Unsecured Debt [Member] | Line of Credit [Member] | Five Year Revolving Credit Facility Due 2023 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds borrowed |  |  | 10.5
Aggregate borrowing capacity |  |  | 10.5
Unsecured Debt [Member] | Line of Credit [Member] | Three Year Revolving Credit Facility April 2021 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds borrowed |  |  | $ 3.4
Debt term |  | 3 years | 3 years
Aggregate borrowing capacity |  | $ 4.0 | $ 4.0
Unsecured Debt [Member] | Line of Credit [Member] | Five Year Revolving Credit Facility April 2020 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt term |  |  | 5 years
Unsecured Debt [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount | $ 4.0 |  |
Weighted average interest rate (percent) | 6.11% |  |
GM Financial [Member] | Line of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate borrowing capacity |  |  | $ 14.5
GM Financial [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate (percent) |  |  | 3.15%
GM Financial [Member] | Unsecured Debt [Member] | Line of Credit [Member] | $2.0 Billion Dollar Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt term | 364 days | 364 days | 364 days
Aggregate borrowing capacity | $ 2.0 | $ 2.0 | $ 2.0
GM Financial [Member] | Unsecured Debt [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  |  | $ 5.9
Weighted average interest rate (percent) |  |  | 3.41%
Weighted-average interest rate on outstanding long-term debt |  |  | 3.38%
GM Financial [Member] | Secured Debt [Member] | Notes Payable, Other Payables [Member] | Securitization notes payable [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  |  | $ 9.0
Weighted average interest rate (percent) |  |  | 1.71%
Weighted-average interest rate on outstanding long-term debt |  |  | 2.42%
Maximum [Member] | GM Financial [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt term |  |  | 4 years

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- Definition Line of Credit Facility, Covenant Terms, Dividend Restrictions, Amount Outstanding + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- 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
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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