STOCKHOLDERS' EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Class of Stock [Line Items]
Dividends declared per share of common stock (in usd per share)	$ 0.42	$ 0.42	$ 0.84	$ 0.84
Common stock dividends declared and paid	$ 194	$ 205	$ 391	$ 410
Preferred stock
Preferred stock dividends declared and paid	$ 35	$ 34	$ 65	$ 57
Series B
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 21.66	$ 30.00	$ 43.38	$ 30.00
Series C
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	22.53	15.94	38.47	31.88
Series D
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	23.78	15.87	39.66	31.75
Series E
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	12.50	12.50	25.00	25.00
Series F
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	14.12	14.12	28.25	28.25
Series G
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 10.00	$ 10.00	$ 20.00	$ 20.00
Dividends Declared
Class of Stock [Line Items]
Common stock dividends declared and paid	$ 194	$ 205	$ 391	$ 410
Preferred stock
Preferred stock dividends declared and paid	35	34	65	57
Dividends Declared | Series B
Preferred stock
Preferred stock dividends declared and paid	6	9	13	9
Dividends Declared | Series C
Preferred stock
Preferred stock dividends declared and paid	7	5	12	10
Dividends Declared | Series D
Preferred stock
Preferred stock dividends declared and paid	7	5	12	10
Dividends Declared | Series E
Preferred stock
Preferred stock dividends declared and paid	6	6	11	11
Dividends Declared | Series F
Preferred stock
Preferred stock dividends declared and paid	6	6	11	11
Dividends Declared | Series G
Preferred stock
Preferred stock dividends declared and paid	3	3	6	6
Dividends Paid
Class of Stock [Line Items]
Common stock dividends declared and paid	194	205	391	410
Preferred stock
Preferred stock dividends declared and paid	30	24	61	57
Dividends Paid | Series B
Preferred stock
Preferred stock dividends declared and paid	6	0	13	9
Dividends Paid | Series C
Preferred stock
Preferred stock dividends declared and paid	5	5	10	10
Dividends Paid | Series D
Preferred stock
Preferred stock dividends declared and paid	5	5	10	10
Dividends Paid | Series E
Preferred stock
Preferred stock dividends declared and paid	6	6	11	11
Dividends Paid | Series F
Preferred stock
Preferred stock dividends declared and paid	5	5	11	11
Dividends Paid | Series G
Preferred stock
Preferred stock dividends declared and paid	$ 3	$ 3	$ 6	$ 6