Investments and Derivative Instruments (Details 12) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Macro hedge program
Notional amount	$ 94,451	$ 159,441
Fair Value	(538)	(737)
International Program Hedging Instruments [Member]
Macro hedge program
Notional amount	0	73,048
Fair Value	0	(33)
Equity options [Member] | International Program Hedging Instruments [Member]
Macro hedge program
Notional amount		3,051
Fair Value		$ (30)