STOCKHOLDERS' EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Dividends declared per share of common stock (in usd per share)	$ 1.68	$ 1.62	$ 1.56
Common stock dividends declared and paid	$ 808	$ 779	$ 670
Preferred stock dividends declared and paid	117	113	113
Dividends Declared
Class of Stock [Line Items]
Common stock dividends declared and paid	808	779	670
Preferred stock dividends declared and paid	117	113	113
Dividends Paid
Class of Stock [Line Items]
Common stock dividends declared and paid	808	779	670
Preferred stock dividends declared and paid	$ 120	$ 113	$ 113
Series A
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 0	$ 0	$ 20.99
Series A | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 0	$ 0	$ 5
Series A | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 0	$ 0	$ 8
Series B
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 74.49	$ 60.00	$ 60.00
Series B | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 22	$ 18	$ 18
Series B | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 25	$ 18	$ 18
Series C
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 63.75	$ 63.75	$ 63.75
Series C | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 19	$ 19	$ 19
Series C | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 19	$ 19	$ 19
Series D
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 63.50	$ 63.50	$ 63.50
Series D | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 19	$ 19	$ 18
Series D | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 19	$ 19	$ 18
Series E
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 50.00	$ 50.00	$ 50.00
Series E | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 22	$ 22	$ 23
Series E | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 22	$ 22	$ 23
Series F
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 56.50	$ 56.50	$ 56.50
Series F | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 23	$ 23	$ 23
Series F | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 23	$ 23	$ 23
Series G
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	$ 40.00	$ 40.00	$ 22.78
Series G | Dividends Declared
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 12	$ 12	$ 7
Series G | Dividends Paid
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 12	$ 12	$ 4