STOCKHOLDERS' EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Class of Stock [Line Items]
Dividends declared per share of common stock (in usd per share)	$ 0.42	$ 0.39	$ 0.84	$ 0.78
Common stock dividends declared and paid	$ 205	$ 195	$ 410	$ 360
Preferred stock
Preferred stock dividends declared and paid	$ 34	$ 32	$ 57	$ 56
Series B
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 30.00	$ 30.00	$ 30.00	$ 30.00
Series C
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	15.94	15.94	31.88	31.88
Series D
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	15.87	15.87	31.75	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	$ 205	$ 195	$ 410	$ 360
Preferred stock
Preferred stock dividends declared and paid	34	32	57	56
Dividends Declared | Series B
Preferred stock
Preferred stock dividends declared and paid	9	9	9	9
Dividends Declared | Series C
Preferred stock
Preferred stock dividends declared and paid	5	5	10	10
Dividends Declared | Series D
Preferred stock
Preferred stock dividends declared and paid	5	4	10	9
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	5	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	205	195	410	360
Preferred stock
Preferred stock dividends declared and paid	24	23	57	56
Dividends Paid | Series B
Preferred stock
Preferred stock dividends declared and paid	0	0	9	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	4	10	9
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