Equity Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 1,360	$ 1,620	$ 1,733	$ 1,203
OCI before reclassifications	(101)	145	(158)	707
Amounts reclassified from OCI	354	(50)	38	(195)
Total other comprehensive income (loss)	253	95	(120)	512
Ending balance	1,613	1,715	1,613	1,715
Available-for-Sale Securities [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	1,750	2,044	2,121	1,627
OCI before reclassifications	(107)	113	(164)	675
Amounts reclassified from OCI	(70)	(50)	(384)	(195)
Total other comprehensive income (loss)	(177)	63	(548)	480
Ending balance	1,573	2,107	1,573	2,107
Accumulated Other Comprehensive Income (Loss), Other [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(390)	(424)	(388)	(424)
OCI before reclassifications	6	32	6	32
Amounts reclassified from OCI	424	0	422	0
Total other comprehensive income (loss)	430	32	428	32
Ending balance	$ 40	$ (392)	$ 40	$ (392)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details