Investments- Scheduled Maturities (Details 2) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Amortized cost
Due in one year or less	$ 1,026
Due after one year through five years	8,224
Due after five years through ten years	8,085
Due after ten years	4,564
Subtotal	21,899
ABS, RMBS and CMBS	1,100
Amortized cost	22,999	$ 23,770
Fair value
Due in one year or less	1,043
Due after one year through five years	8,712
Due after five years through ten years	8,568
Due after ten years	5,331
Subtotal	23,654
ABS, RMBS and CMBS	1,142
Fair value	$ 24,796	$ 24,629