EQUITY (Details - Preferred Stock) - USD ($) $ / shares in Units, $ in Millions										6 Months Ended
	Jun. 29, 2021	Jun. 15, 2021	Mar. 30, 2021	Mar. 15, 2021	Jun. 29, 2020	Jun. 15, 2020	Mar. 30, 2020	Mar. 16, 2020	Mar. 14, 2019	Jun. 30, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Issuances (in shares)										6,015,808
Preferred stock, par value (in dollars per share)										$ 5.00	$ 5
Preferred stock liquidation preference										$ 500	$ 500
Date dividends declared	May 06, 2021		Feb. 16, 2021		May 04, 2020		Feb. 12, 2020
Date dividends paid	Jun. 29, 2021		Mar. 30, 2021		Jun. 29, 2020		Mar. 30, 2020
Date of record	Jun. 15, 2021		Mar. 16, 2021		Jun. 15, 2020		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		May 06, 2021		Feb. 16, 2021		May 04, 2020		Feb. 12, 2020
Preferred Stock Dividends Per Share Cash Paid		$ 365.625		$ 365.625		$ 365.625		$ 365.625
Date dividends paid		Jun. 15, 2021		Mar. 15, 2021		Jun. 15, 2020		Mar. 16, 2020
Date of record		May 31, 2021		Feb. 26, 2021		May 29, 2020		Feb. 28, 2020
Depositary Shares
Class of Stock [Line Items]
Issuances (in shares)									20,000,000
Preferred stock liquidation preference									$ 25
Date dividends declared		May 06, 2021		Feb. 16, 2021		May 04, 2020		Feb. 12, 2020
Preferred Stock Dividends Per Share Cash Paid		$ 0.365625		$ 0.365625		$ 0.365625		$ 0.365625
Date dividends paid		Jun. 15, 2021		Mar. 15, 2021		Jun. 15, 2020		Mar. 16, 2020
Date of record		May 31, 2021		Feb. 26, 2021		May 29, 2020		Feb. 28, 2020