Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 3,023	$ 3,196	$ 8,996	$ 7,278
Dividends distributed or available for distribution to senior preferred stockholder	(3,048)	(2,977)	(8,944)	(6,765)
Net income (loss) attributable to common stockholders	$ (25)	$ 219	$ 52	$ 513
Weighted-average common shares outstanding, Basic	5,762	5,762	5,762	5,762
Convertible preferred stock	0	131	131	131
Weighted-average common shares outstanding, Diluted	5,762	5,893	5,893	5,893
Earnings (loss) per share, Basic	$ 0.00	$ 0.04	$ 0.01	$ 0.09
Earnings (loss) per share, Diluted	$ 0.00	$ 0.04	$ 0.01	$ 0.09
Weighted average shares of common stock that would be issued upon the full exercise of the warrant issued to Treasury	4,600	4,600	4,600	4,600