XML 52 R157.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

REGULATORY MATTERS - Narrative (Details) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Banking and Thrift [Abstract] |  |
Minimum Capital Adequacy | 7.00% | 6.375%

X
- Definition The minimum common equity tier 1 ratio (CET1 divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | cfg_CommonEquityTier1RequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | cfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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