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BASIS OF PRESENTATION (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] | Accounting Pronouncements Adopted in 2020
Pronouncement | Summary of Guidance | Effects on Financial Statements
Financial Instruments - Credit Losses Issued June 2016 | •Required effective date: January 1, 2020. •Establishes a single allowance framework for financial assets carried at amortized cost (including securities HTM), which reflects management’s estimate of credit losses over the full remaining expected life of the financial assets. •Amends impairment guidance for securities AFS to incorporate an allowance, which allows for reversals of impairment losses in the event that the credit of an issuer improves. •Requires a cumulative-effect adjustment to retained earnings, net of taxes, as of the beginning of the reporting period of adoption. •Requires enhanced credit quality disclosures including disaggregation of credit quality indicators by vintage. | •The Company adopted the new standard on January 1, 2020, under the modified retrospective approach. Refer to Note 5 for discussion of the significant accounting policy for the allowance for credit losses following adoption. •Adoption resulted in a cumulative-effect reduction of $337 million, net of taxes of $114 million, to retained earnings and a corresponding increase to the ACL of $451 million. Refer to Note 5 for the impact of the adoption to the ALLL and reserve for unfunded commitments. •Adoption of the new standard could produce higher volatility in the quarterly provision for credit losses than the prior incurred loss reserve process and could adversely impact the Company’s ongoing earnings. •Based on the credit quality of the Company’s existing debt securities portfolio, the Company did not recognize an allowance for HTM and AFS debt securities upon adoption.
Goodwill Issued January 2017 | •Requires an impairment loss to be recognized when the estimated fair value of a reporting unit falls below its carrying value. •Eliminates the second condition in the previous guidance that required an impairment loss to be recognized only if the estimated implied fair value of the goodwill is below its carrying value. •Applied prospectively to all goodwill impairment tests performed after the adoption date. | •The Company adopted the new standard on January 1, 2020. Refer to Note 9 for discussion of the significant accounting policy for goodwill impairment following adoption. •Adoption did not have a material impact on the Company’s Consolidated Financial Statements.
Disclosure Requirements - Fair Value Measurements Issued August 2018 | •Amends disclosure requirements on fair value measurements. •Eliminates requirements for certain disclosures that are no longer considered relevant or cost beneficial, requires new disclosures and modifies existing disclosures that are expected to enhance the usefulness of the financial statements. •Prospective application is required for new disclosures. •Retrospective application is required for all other amendments for all periods presented. | •The Company adopted the new standard on January 1, 2020. •Adoption did not have a material impact on the Company’s Consolidated Financial Statements. Required fair value measurement disclosures are included in Note 19.
Simplifying the Accounting for Income Taxes Issued December 2019 | •Simplifies the accounting for income taxes by eliminating certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. •Simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates. •Clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. | • The Company adopted the new standard on January 1, 2020. • Adoption did not have an impact on the Company’s Consolidated Financial Statements.
Facilitation of the Effects of Reference Rate Reform on Financial Reporting Issued March 2020 | •Provides the option to apply a number of practical expedients when evaluating if a contract modification as the result of reference rate reform is considered a new contract or a continuation of an existing contract. •Provides optional expedients to the evaluation of, and accounting for, fair value and cash flow hedges affected by reference rate reform. •Provides an optional one-time election to sell or transfer debt securities classified as HTM that reference a rate affected by reference rate reform | •The Company adopted the new standard in the first quarter of 2020 upon issuance and is effective through December 31, 2022. •Adoption did not have a material impact on the Company’s Consolidated Financial Statements.

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e725-108305 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794 + Details
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