LOANS AND ALLOWANCE FOR CREDIT LOSSES (Loan and Lease Portfolio Composition) (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Loans Receivable [Line Items]
Total	[1],[2]	$ 91,293,831	$ 92,705,440
Loans held for investment with fixed rate of interest		61,109,094	61,775,942
Loans held for investment with variable rate of interest		$ 30,184,737	$ 30,929,498
Loans held for investment, percent of total loans		100.00%	100.00%
Loans held for investment with fixed rate of interest, percent of total loans		66.90%	66.60%
Loans held for investment with variable rate of interest, percent of total loans		33.10%	33.40%
Net increase in loan balances		$ 3,100,000	$ 3,200,000
Commercial
Loans Receivable [Line Items]
Total		$ 40,819,642	$ 41,034,716
Loans held for investment, percent of total loans		44.70%	44.40%
Commercial | CRE loans
Loans Receivable [Line Items]
Total		$ 7,400,780	$ 8,468,023
Loans held for investment, percent of total loans		8.10%	9.10%
Commercial | C&I loans
Loans Receivable [Line Items]
Total		$ 17,664,463	$ 16,534,694
Loans held for investment, percent of total loans		19.30%	17.80%
Commercial | Multifamily loans
Loans Receivable [Line Items]
Total		$ 8,562,825	$ 8,641,204
Loans held for investment, percent of total loans		9.40%	9.30%
Commercial | Other commercial
Loans Receivable [Line Items]
Total		$ 7,191,574	$ 7,390,795
Loans held for investment, percent of total loans		7.90%	8.20%
Consumer
Loans Receivable [Line Items]
Total		$ 50,474,189	$ 51,670,724
Loans held for investment, percent of total loans		55.30%	55.60%
Consumer | Residential mortgages
Loans Receivable [Line Items]
Total		$ 7,443,130	$ 8,835,702
Consumer | Home equity loans and lines of credit
Loans Receivable [Line Items]
Total		4,514,680	4,770,344
Consumer | RICs and auto loans
Loans Receivable [Line Items]
Total		37,365,398	36,456,747
Consumer loans secured by real estate
Loans Receivable [Line Items]
Total		$ 11,957,810	$ 13,606,046
Loans held for investment, percent of total loans		13.10%	14.60%
Consumer loans secured by real estate | Residential mortgages
Loans Receivable [Line Items]
Total		$ 7,443,130	$ 8,835,702
Loans held for investment, percent of total loans		8.20%	9.50%
Consumer loans secured by real estate | Home equity loans and lines of credit
Loans Receivable [Line Items]
Total		$ 4,514,680	$ 4,770,344
Loans held for investment, percent of total loans		4.90%	5.10%
Consumer loans not secured by real estate | RICs and auto loans
Loans Receivable [Line Items]
Total		$ 37,365,398	$ 36,456,747
Loans held for investment, percent of total loans		40.90%	39.30%
Consumer loans not secured by real estate | Personal unsecured loans
Loans Receivable [Line Items]
Total		$ 881,244	$ 1,291,547
Loans held for investment, percent of total loans		1.00%	1.40%
Consumer loans not secured by real estate | Other consumer
Loans Receivable [Line Items]
Total		$ 269,737	$ 316,384
Loans held for investment, percent of total loans		0.30%	0.30%

[1] LHFI includes $72.9 million and $102.0 million of loans recorded at fair value at June 30, 2020 and December 31, 2019, respectively.

[2] The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At June 30, 2020 and December 31, 2019, LHFI included $22.5 billion and $26.5 billion, Operating leases assets, net included $16.2 billion and $16.5 billion, restricted cash included $1.6 billion and $1.6 billion, other assets included $703.2 million and $625.4 million, Borrowings and other debt obligations included $32.3 billion and $34.2 billion, and Other liabilities included $101.1 million and $188.1 million of assets or liabilities that were included within VIEs, respectively. See Note 7 to these Condensed Consolidated Financial Statements for additional information.