STOCKHOLDERS' EQUITY - Authorized Preferred Shares (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2025	Jul. 31, 2025	Dec. 31, 2024
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 25.00		$ 25.00
Preferred stock, authorized (in shares)	100,000,000		100,000,000
Preferred stock:
Preferred stock, issued (in shares)	2,150,000		2,150,000
Preferred stock, value, issued	$ 2,111		$ 2,113
Series B
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000		300,000
Preferred stock, value, issued	$ 296		$ 296
Series C
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000		300,000
Preferred stock, value, issued	$ 297		$ 297
Series E
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	450,000		450,000
Preferred stock, value, issued	$ 437		$ 437
Liquidation preference per depository share (usd per share)	$ 25
Depositary shares issued (in shares)	18,000,000
Depository share interest percentage	2.50%
Series F
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	0		400,000
Preferred stock, value, issued	$ 0		$ 395
Series G
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000		300,000
Preferred stock, value, issued	$ 296		$ 296
Series H
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	400,000		400,000
Preferred stock, value, issued	$ 392		$ 392
Liquidation preference per depository share (usd per share)	$ 25
Depositary shares issued (in shares)	16,000,000
Depository share interest percentage	2.50%
Series I
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)		$ 25
Preferred stock:
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, issued (in shares)	400,000	400,000	0
Preferred stock, value, issued	$ 393	$ 400	$ 0
Depositary shares issued (in shares)	16,000,000
Depository share interest percentage	2.50%