EQUITY (Details - Preferred Stock) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 14, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Issuances (in shares)		3,127,472
Preferred stock, par value (in dollars per share)		$ 5		$ 0
Preferred stock liquidation preference		$ 500		$ 0
Issuance of preferred stock		$ 485	$ 0
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
Preferred stock liquidation preference	$ 25,000
Issuance of preferred stock	$ 485
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
Depositary Shares | Rating Agency Event [Member]
Class of Stock [Line Items]
Preferred stock redemption price per share	25.5
Depositary Shares | Regulatory Capital Event [Member]
Class of Stock [Line Items]
Preferred stock redemption price per share	$ 25