Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details)

v3.21.2
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 21,923 $ 33,327
Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 1,471 6,271
Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 10,002 9,681
Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 10,450 17,375
Loans Payable [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 11,921 18,646
Loans Payable [Member] | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 1,471 1,271
Loans Payable [Member] | Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0 0
Loans Payable [Member] | Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 10,450 17,375
Securities Investment [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 5,201 3,484
Securities Investment [Member] | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0 0
Securities Investment [Member] | Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 5,201 3,484
Securities Investment [Member] | Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0 0
Other long-term debt    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 4,801 11,197
Other long-term debt | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0 5,000
Other long-term debt | Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 4,801 6,197
Other long-term debt | Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 0 $ 0