XML 119 R101.htm IDEA: XBRL DOCUMENT
v3.19.1

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) counterparty | Dec. 31, 2018 USD ($) | Dec. 31, 2003
Risk Participation Agreements [Abstract] |  |  |
Risk participation agreements number of counterparties | counterparty | 86 |  |
Risk participation agreements, Maximum term | 9 years |  |
Commercial real estate loans held for sale | Purchase commitment |  |  |
Other Commitments [Abstract] |  |  |
Unsettled commercial loan trade purchases | $ 166 | $ 68 |
Unsettled commercial loan trade sales | $ 234 | $ 161 |
Minimum |  |  |
Risk Participation Agreements [Abstract] |  |  |
Risk participation agreements, Average term | 1 year |  |
Maximum |  |  |
Risk Participation Agreements [Abstract] |  |  |
Risk participation agreements, Average term | 5 years |  |
Marketing rights |  |  |
Marketing Rights [Abstract] |  |  |
Commitment period |  |  | 25 years
Financial standby letters of credit |  |  |
Letters of Credit [Abstract] |  |  |
Letters of credit outstanding | 10 years |  |
Commercial letters of credit |  |  |
Letters of Credit [Abstract] |  |  |
Letters of credit outstanding | 1 year |  |
Purchase Of Education Loans |  |  |
Other Commitments [Abstract] |  |  |
Other Commitment, Remaining Maximum Amount Committed | $ 799 |  |
Purchase Of Education Loans | Minimum |  |  |
Other Commitments [Abstract] |  |  |
Commitment amount | 600 |  |
Purchase Of Education Loans | Maximum |  |  |
Other Commitments [Abstract] |  |  |
Commitment amount | $ 1,000 |  |

X
- Definition Commitments [Abstract] + References No definition available. + Details
Name: | cfg_CommitmentsAbstract
Namespace Prefix: | cfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describe the approximate term of the guarantee or each group of similar guarantees. + References No definition available. + Details
Name: | cfg_GuarantorObligationTerm
Namespace Prefix: | cfg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Letters of Credit [Abstract] + References No definition available. + Details
Name: | cfg_LettersofCreditAbstract
Namespace Prefix: | cfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Marketing Rights [Abstract] + References No definition available. + Details
Name: | cfg_MarketingRightsAbstract
Namespace Prefix: | cfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Commitment, Remaining Maximum Amount Committed + References No definition available. + Details
Name: | cfg_OtherCommitmentRemainingMaximumAmountCommitted
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Risk Participation Agreements [Abstract] + References No definition available. + Details
Name: | cfg_RiskParticipationAgreementsAbstract
Namespace Prefix: | cfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average period covered by risk participation contracts in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | cfg_RiskParticipationAgreementsAverageTerm
Namespace Prefix: | cfg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of risk participation agreement counterparties. + References No definition available. + Details
Name: | cfg_RiskParticipationAgreementsCounterpartiesNumber
Namespace Prefix: | cfg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum period covered by risk participation contracts in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | cfg_RiskParticipationAgreementsMaximumTerm
Namespace Prefix: | cfg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The face amount of commercial and commercial real estate loans committed to purchase, but unsettled as of the balance sheet date. + References No definition available. + Details
Name: | cfg_UnsettledReceivableHeldForSaleAmount
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the carrying amount of loans and leases for which agreements to acquire or dispose exist. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61082-112788 + Details
Name: | us-gaap_LoansAndLeasesReceivableCommitmentsToPurchaseOrSell
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cfg_CommercialRealEstateLoansHeldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=us-gaap_PurchaseCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=cfg_NamingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_FinancialStandbyLetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=cfg_CommercialLetterofCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cfg_PurchaseOfEducationLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |