EQUITY (Details - Preferred Stock) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended
	Mar. 30, 2020	Mar. 16, 2020	Mar. 29, 2019	Mar. 14, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Issuances (in shares)					3,452,529
Preferred stock, par value (in dollars per share)					$ 5.00		$ 5
Preferred stock liquidation preference					$ 500		$ 500
Issuance of preferred stock					$ 0	$ 485
Date dividends declared	Feb. 12, 2020		Feb. 13, 2019
Date dividends paid	Mar. 30, 2020		Mar. 29, 2019
Date of record	Mar. 16, 2020		Mar. 15, 2019
Series A Preferred Stock
Class of Stock [Line Items]
Issuances (in shares)				20,000
Preferred stock, dividend rate (as a percent)				5.85%	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. 12, 2020
Preferred Stock Dividends Per Share Cash Paid		$ 365.625
Date dividends paid		Mar. 16, 2020
Date of record		Feb. 28, 2020
Series A Preferred Stock | Rating Agency Event [Member]
Class of Stock [Line Items]
Preferred stock redemption terms					90 days
Preferred stock redemption price per share				$ 25,500
Series A Preferred Stock | Regulatory Capital Event [Member]
Class of Stock [Line Items]
Preferred stock redemption terms					90 days
Preferred stock redemption price per share				$ 25,000
Depositary Shares
Class of Stock [Line Items]
Issuances (in shares)				20,000,000
Preferred stock liquidation preference				$ 25.00
Preferred Stock Dividends Per Share Cash Paid		$ 0.365625
Depositary Shares | Rating Agency Event [Member]
Class of Stock [Line Items]
Preferred stock redemption price per share				25.50
Depositary Shares | Regulatory Capital Event [Member]
Class of Stock [Line Items]
Preferred stock redemption price per share				$ 25.00