EQUITY (Details - Preferred Stock) - USD ($) $ / shares in Units, $ in Millions						3 Months Ended
	Mar. 30, 2021	Mar. 15, 2021	Mar. 30, 2020	Mar. 16, 2020	Mar. 14, 2019	Mar. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Issuances (in shares)						5,857,575
Preferred stock, par value (in dollars per share)						$ 5.00	$ 5
Preferred stock liquidation preference						$ 500	$ 500
Date dividends declared	Feb. 16, 2021		Feb. 12, 2020
Date dividends paid	Mar. 30, 2021		Mar. 30, 2020
Date of record	Mar. 16, 2021		Mar. 16, 2020
Series A Preferred Stock
Class of Stock [Line Items]
Issuances (in shares)					20,000
Preferred stock, dividend rate (as a percent)					5.85%
Preferred stock, par value (in dollars per share)					$ 5.00
Preferred stock liquidation preference					$ 25,000
Issuance of preferred stock					$ 485
Date dividends declared		Feb. 16, 2021		Feb. 12, 2020
Preferred Stock Dividends Per Share Cash Paid		$ 365.625		$ 365.625
Date dividends paid		Mar. 15, 2021		Mar. 16, 2020
Date of record		Feb. 26, 2021		Feb. 28, 2020
Depositary Shares
Class of Stock [Line Items]
Issuances (in shares)					20,000,000
Preferred stock liquidation preference					$ 25
Date dividends declared		Feb. 16, 2021		Feb. 12, 2020
Preferred Stock Dividends Per Share Cash Paid		$ 0.365625		$ 0.365625
Date dividends paid		Mar. 15, 2021		Mar. 16, 2020
Date of record		Feb. 26, 2021		Feb. 28, 2020