Investments- Scheduled Maturities (Details 2) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Amortized cost
Due in one year or less	$ 1,029
Due after one year through five years	7,733
Due after five years through ten years	7,982
Due after ten years	4,704
Subtotal	21,448
ABS, RMBS and CMBS	1,515
Amortized cost	22,963	$ 23,770
Fair value
Due in one year or less	1,043
Due after one year through five years	8,215
Due after five years through ten years	8,411
Due after ten years	5,455
Subtotal	23,124
ABS, RMBS and CMBS	1,554
Fair value	$ 24,678	$ 24,629