SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Class of Stock [Line Items]
Shares outstanding (in shares)	885,000			885,000		877,500
Carrying Amount	$ 2,731			$ 2,731		$ 1,989
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) [Member]			Secured Overnight Financing Rate (SOFR) [Member]
Amount	$ 27		$ 36	$ 81	$ 107
Retained Earnings
Class of Stock [Line Items]
Amount	$ 27		$ 36	$ 81	$ 107
Series B
Class of Stock [Line Items]
Shares outstanding (in shares)	35,500			35,500
Carrying Amount	$ 24			$ 24		23
Preferred stock, basis spread adjustment on variable rate	0.26%			0.26%
Preferred stock, variable rate basis spread	2.70%			2.70%
Cash dividend declared per share (in usd per share)	$ 18.20		$ 20.66	$ 54.40	$ 62.08
Series B | Retained Earnings
Class of Stock [Line Items]
Amount	$ 0		$ 1	$ 2	$ 2
Series F
Class of Stock [Line Items]
Shares outstanding (in shares)	5,000			5,000
Dividend Rate				5.625%
Carrying Amount	$ 494			$ 494		494
Cash dividend declared per share (in usd per share)	$ 1,406.25		$ 1,406.25	$ 4,218.75	$ 4,218.75
Series F | Retained Earnings
Class of Stock [Line Items]
Amount	$ 7		$ 7	$ 21	$ 21
Series G
Class of Stock [Line Items]
Shares outstanding (in shares)	5,000			5,000
Dividend Rate				4.45%
Carrying Amount	$ 494			$ 494		494
Cash dividend declared per share (in usd per share)	$ 1,112.5		$ 1,112.5	$ 3,337.5	$ 3,337.5
Series G | Retained Earnings
Class of Stock [Line Items]
Amount	$ 6		$ 6	$ 17	$ 17
Series H
Class of Stock [Line Items]
Shares outstanding (in shares)	500,000			500,000
Dividend Rate				4.50%
Carrying Amount	$ 486			$ 486		486
Cash dividend declared per share (in usd per share)	$ 11.25		$ 11.25	$ 33.75	$ 33.75
Series H | Retained Earnings
Class of Stock [Line Items]
Amount	$ 6		$ 5	$ 17	$ 17
Series I
Class of Stock [Line Items]
Shares outstanding (in shares)	7,000			7,000
Dividend Rate				5.70%
Carrying Amount	$ 175			$ 175		175
Redemption price (per share)	$ 25,000			$ 25,000
Cash dividend declared per share (in usd per share)	$ 356.25		$ 356.25	$ 1,068.75	$ 1,068.75
Series I | Retained Earnings
Class of Stock [Line Items]
Amount	$ 2		$ 2	$ 7	$ 7
Series J
Class of Stock [Line Items]
Shares outstanding (in shares)	325,000			325,000
Dividend Rate				6.875%
Carrying Amount	$ 317			$ 317		317
Cash dividend declared per share (in usd per share)	$ 17.19		$ 17.19	$ 51.57	$ 51.57
Series J | Retained Earnings
Class of Stock [Line Items]
Amount	$ 6		$ 6	$ 17	$ 17
Series K
Class of Stock [Line Items]
Shares outstanding (in shares)	7,500			7,500
Dividend Rate				6.25%
Carrying Amount	$ 741			$ 741		$ 0
Cash dividend declared per share (in usd per share)	$ 0			$ 0
Series K | Retained Earnings
Class of Stock [Line Items]
Amount	$ 0			$ 0
Series B, H and J Preferred Stock
Class of Stock [Line Items]
Redemption price (per share)	$ 1,000			$ 1,000
Series F and G Preferred Stock
Class of Stock [Line Items]
Redemption price (per share)	100,000			100,000
Series E
Class of Stock [Line Items]
Cash dividend declared per share (in usd per share)			$ 2,157.65		$ 6,412.62
Stock redeemed		$ 405
Preferred stock par value (in USD per share)						$ 0.01
Series E | Retained Earnings
Class of Stock [Line Items]
Amount			$ 9		$ 26