XML 23 R105.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Loans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, Unpaid principal balance | $ 19 | $ 19
Minimum [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Interest Rate On Term Loan |  | 6.51%
Loan Maturity Date | Jun. 30, 2026 |
Maximum [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Interest Rate On Term Loan | 7.35% | 8.60%
Loan Maturity Date | Dec. 15, 2046 |

X
- Definition Interest Rate On Term Loan + References No definition available. + Details
Name: | ambc_InterestRateOnTermLoan
Namespace Prefix: | ambc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loan Maturity date + References No definition available. + Details
Name: | ambc_LoanMaturityDate
Namespace Prefix: | ambc_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition This represents the amount of principal outstanding on loans receivable that are presented on the balance sheet at fair value, whether such presentation is as a separate caption or parenthetical disclosure. + References No definition available. + Details
Name: | ambc_LoansUnpaidPrincipalBalance
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |