Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details)

v3.20.2
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 28,671 $ 25,927
Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 1,000 0
Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 10,296 7,540
Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 17,375 18,387
Loans Payable [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 18,375 18,375
Loans Payable [Member] | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 1,000 0
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 17,375 18,375
Securities Investment [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 3,309 12
Securities Investment [Member] | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount   0
Securities Investment [Member] | Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 3,309 0
Securities Investment [Member] | Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0 12
Other long-term debt    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 6,987 7,540
Other long-term debt | Not Designated as Hedging Instrument, Economic Hedge    
Notional Disclosures [Abstract]    
Derivative, Notional Amount   0
Other long-term debt | Fair Value Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 6,987 7,540
Other long-term debt | Cash Flow Hedging | Designated as Hedging Instrument [Member]    
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 0 $ 0