STOCKHOLDERS' EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Common stock
Dividends declared per share of common stock (in usd per share)	$ 0.42	$ 0.42	$ 0.84	$ 0.84
Dividends Declared	$ 185	$ 194	$ 371	$ 391
Dividends Paid	185	194	371	391
Preferred stock
Dividends Declared	34	35	67	65
Dividends Paid	$ 33	$ 30	$ 67	$ 61
Series B
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 19.08	$ 21.66	$ 38.19	$ 43.38
Dividends Declared	$ 6	$ 6	$ 12	$ 13
Dividends Paid	$ 6	$ 6	$ 12	$ 13
Series C
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 19.47	$ 22.53	$ 38.97	$ 38.47
Dividends Declared	$ 6	$ 7	$ 12	$ 12
Dividends Paid	$ 6	$ 5	$ 12	$ 10
Series D
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 0	$ 23.78	$ 0	$ 39.66
Dividends Declared	$ 0	$ 7	$ 0	$ 12
Dividends Paid	$ 0	$ 5	$ 0	$ 10
Series E
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 12.50	$ 12.50	$ 25.00	$ 25.00
Dividends Declared	$ 6	$ 6	$ 11	$ 11
Dividends Paid	$ 5	$ 6	$ 11	$ 11
Series F
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 14.12	$ 14.12	$ 28.25	$ 28.25
Dividends Declared	$ 5	$ 6	$ 11	$ 11
Dividends Paid	$ 5	$ 5	$ 11	$ 11
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	$ 3	$ 3	$ 6	$ 6
Dividends Paid	$ 3	$ 3	$ 6	$ 6
Series H
Preferred stock
Dividends declared per share of preferred stock (in usd per share)	$ 18.44	$ 0	$ 36.88	$ 0
Dividends Declared	$ 8	$ 0	$ 15	$ 0
Dividends Paid	$ 8	$ 0	$ 15	$ 0

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