XML 79 R61.htm IDEA: XBRL DOCUMENT
v3.21.1

MORTGAGE BANKING AND OTHER - Economic Assumptions Used to Estimate Value of MSRs (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract] |  |  |
MSR portfolio fair value | $ 893 |  | $ 658
Weighted average life (in years) | 5 years 10 months 24 days | 4 years 2 months 12 days |
Weighted average constant prepayment rate | 11.30% | 17.30% |
Weighted average option adjusted spread | 5.82% | 5.95% |
Minimum |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Sensitivity analysis, basis spread | 0.50% | 0.50% |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract] |  |  |
Decline in fair value due to 50 bps decrease in prepayment rate | $ 103 | $ 122 |
Decline in fair value due to 50 bps decrease in option adjusted spread | $ 18 | $ 12 |
Maximum |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Sensitivity analysis, basis spread | 1.00% | 1.00% |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract] |  |  |
Decline in fair value due to 100 bps decrease in prepayment rate | $ 228 | $ 202 |
Decline in fair value due to 100 bps decrease in option adjusted spread | $ 37 | $ 24 |

X
- Definition Sensitivity Analysis Of Fair Value, Fair Value Method, Transferor's Interests In Transferred Financial Assets, Impact Of 1 Percent Adverse Change In Option Adjusted Spread + References No definition available. + Details
Name: | cfg_SensitivityAnalysisOfFairValueFairValueMethodTransferorsInterestsInTransferredFinancialAssetsImpactOf1PercentAdverseChangeInOptionAdjustedSpread
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sensitivity Analysis Of Fair Value, Fair Value Method, Transferor's Interests In Transferred Financial Assets, Impact Of 1 Percent Averse Change In Prepayment Speed + References No definition available. + Details
Name: | cfg_SensitivityAnalysisOfFairValueFairValueMethodTransferorsInterestsInTransferredFinancialAssetsImpactOf1PercentAverseChangeInPrepaymentSpeed
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sensitivity Analysis Of Fair Value, Fair Value Method, Transferor's Interests In Transferred Financial Assets, Impact of 0.5 Percent Adverse Change In Prepayment Speed + References No definition available. + Details
Name: | cfg_SensitivityAnalysisOfFairValueFairValueMethodTransferorsInterestsInTransferredFinancialAssetsImpactof0.5PercentAdverseChangeInPrepaymentSpeed
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sensitivity Analysis Of Fair Value, Fair Value Method, Transferor's Interests In Transferred Financial Assets, Impact of 0.5 Percent Adverse Change Option Adjusted Spread + References No definition available. + Details
Name: | cfg_SensitivityAnalysisOfFairValueFairValueMethodTransferorsInterestsInTransferredFinancialAssetsImpactof0.5PercentAdverseChangeOptionAdjustedSpread
Namespace Prefix: | cfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sensitivity Analysis of Fair Value Inputs, Basis Spread + References No definition available. + Details
Name: | cfg_SensitivityAnalysisofFairValueInputsBasisSpread
Namespace Prefix: | cfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
Name: | us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate used to estimate the fair value of servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746 + Details
Name: | us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated rate of prepayments of principal on servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746 + Details
Name: | us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average life of financial assets and financial liabilities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746 + Details
Name: | us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_ServicingAssetsAtFairValueLineItems
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: |