Investments- Scheduled Maturities (Details 2) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Amortized cost
Due in one year or less	$ 1,516
Due after one year through five years	8,253
Due after five years through ten years	7,502
Due after ten years	4,276
Subtotal	21,547
ABS, RMBS and CMBS	777
Amortized cost	22,324	$ 23,112
Fair value
Due in one year or less	1,527
Due after one year through five years	8,655
Due after five years through ten years	7,769
Due after ten years	4,873
Subtotal	22,824
ABS, RMBS and CMBS	827
Fair value	$ 23,651	$ 24,222