EQUITY - Preferred Stock Series B (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 15, 2025	Aug. 11, 2020	Sep. 30, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Preferred stock par value (in dollars per share)			$ 1	$ 1
Payments of stock issuance costs		$ 6
Series B
Class of Stock [Line Items]
Depositary stock, shares issued (in shares)		500,000
Conversion to preferred stock from depositary stock (in shares)		0.04
Preferred stock par value (in dollars per share)		$ 1.00
Liquidation preference in preferred stock (in usd per share)		$ 25,000
Sale of stock, consideration received per transaction, net		$ 494
Sale of stock, consideration received per transaction		$ 500
Preferred stock, dividend rate, percentage		4.95%
Preferred stock, dividend rate, reassessment period		5 years
Preferred stock, redemption price per share (in usd per share)		$ 25,000
Preferred stock, redemption price, rating agency period		90 days
Preferred stock, redemption price, rating agency per share (in usd per share)		$ 25,500
Preferred stock, redemption price, regulatory capital per share (in usd per share)		$ 25,000
Series B | Forecast
Class of Stock [Line Items]
Preferred stock, basis spread, percentage	4.736%