Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Parent [Member]	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 18,636,000,000						$ 0
December 31, 2016 at Dec. 31, 2015		$ 75,000,000	$ 16,850,000,000	$ 117,000,000	$ 18,636,000,000	$ 1,594,000,000
Adjustments to Additional Paid in Capital, Capital Contributions from Parent	1,574,000,000		1,574,000,000		1,574,000,000
Net income (loss)	(1,492,000,000)			(1,492,000,000)	(1,492,000,000)		0
Other comprehensive income (loss), net of income tax	905,000,000				905,000,000	905,000,000
September 30, 2017 at Sep. 30, 2016		75,000,000	18,424,000,000	(1,375,000,000)	19,623,000,000	2,499,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	19,623,000,000						0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	16,865,000,000						0
Noncontrolling Interest, Period Increase (Decrease)	15,000,000				0		15,000,000
December 31, 2016 at Dec. 31, 2016	16,865,000,000	75,000,000	18,461,000,000	(2,919,000,000)	16,865,000,000	1,248,000,000
Amount of other increase (decrease) in additional paid in capital (APIC) due to a return of capital	(2,737,000,000)		(2,737,000,000)		(2,737,000,000)
Adjustments to Additional Paid in Capital, Capital Contributions from Parent	2,933,000,000		2,933,000,000		2,933,000,000
Adjustments to Additional Paid in Capital, Other	202,000,000		202,000,000		202,000,000
Net income (loss)	(1,318,000,000)			(1,318,000,000)	(1,318,000,000)		0
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	(1,318,000,000)
Other comprehensive income (loss), net of income tax	17,000,000				17,000,000	17,000,000
September 30, 2017 at Sep. 30, 2017	15,962,000,000	$ 75,000,000	$ 18,859,000,000	$ (4,237,000,000)	$ 15,962,000,000	$ 1,265,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 15,977,000,000						$ 15,000,000