Consolidated Statements of Changes in Stockholder's Equity - USD ($) $ in Millions		Total	Common Stock	Additional Paid-in Capital	Retained Earnings		Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
BALANCE, beginning at Dec. 31, 2012		$ 12,691	$ 136	$ 5,994	$ 6,811		$ (514)	$ 264
BALANCE beginning, shares at Dec. 31, 2012		136,330,830
Net income (loss)		$ 629			647			(18)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(110)
Other comprehensive income (loss), net of tax		(110)					(110)
Compensation - restricted stock units		(5)		(5)
Capital contribution from BTMU	[1]	1,200		1,200
Other		9		2				7
Net change		1,723		1,197	647		(110)	(11)
BALANCE, ending at Dec. 31, 2013		$ 14,414	136	7,191	7,458		(624)	253
BALANCE ending, shares at Dec. 31, 2013		136,330,830
Net income (loss)		$ 797			816			(19)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(105)
Other comprehensive income (loss), net of tax		(105)					(105)
Compensation - restricted stock units		$ 10		10
Capital contribution from BTMU (shares)		1
Capital contribution from BTMU	[1]	$ 31		31
Other		5			9	[1]		(4)
Net change		$ 738		41	825		(105)	(23)
Net change, shares		1
BALANCE, ending at Dec. 31, 2014		$ 15,152	136	7,232	8,283		(729)	230
BALANCE ending, shares at Dec. 31, 2014		136,330,831
Net income (loss)		$ 528			573			(45)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(23)					(23)
Other comprehensive income (loss), net of tax		(23)
Compensation - restricted stock units		7		9	(2)
Other	[1]	(4)			0			(4)
Net change		$ 508		9	571		(23)	(49)
Net change, shares		0
BALANCE, ending at Dec. 31, 2015		$ 15,660	$ 136	$ 7,241	$ 8,854		$ (752)	$ 181
BALANCE ending, shares at Dec. 31, 2015		136,330,831

[1] For additional information on the capital contribution, refer to Note 20 to these consolidated financial statements.