EQUITY (Details - Preferred Stock) - USD ($) $ / shares in Units, $ in Millions									6 Months Ended
	Jun. 29, 2020	Jun. 15, 2020	Mar. 30, 2020	Mar. 16, 2020	Jun. 28, 2019	Jun. 17, 2019	Mar. 29, 2019	Mar. 14, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Issuances (in shares)									3,595,763
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	May 04, 2020		Feb. 12, 2020		May 06, 2019		Feb. 13, 2019
Date dividends paid	Jun. 29, 2020		Mar. 30, 2020		Jun. 28, 2019		Mar. 29, 2019
Date of record	Jun. 15, 2020		Mar. 16, 2020		Jun. 14, 2019		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		May 04, 2020		Feb. 12, 2020		May 21, 2019
Preferred Stock Dividends Per Share Cash Paid		$ 365.625		$ 365.625		$ 369.6875
Date dividends paid		Jun. 15, 2020		Mar. 16, 2020		Jun. 17, 2019
Date of record		May 29, 2020		Feb. 28, 2020		May 31, 2019
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
Date dividends declared		May 04, 2020		Feb. 12, 2020		May 21, 2019
Preferred Stock Dividends Per Share Cash Paid		$ 0.365625		$ 0.365625		$ 0.3696875
Date dividends paid		Jun. 15, 2020		Mar. 16, 2020		Jun. 17, 2019
Date of record		May 29, 2020		Feb. 28, 2020		May 31, 2019
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