Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Comprehensive Income
Net Income (Loss) Attributable to Parent	$ 216	$ 413	$ 539	$ 880
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	216	413	539	880
Other Comprehensive Income (Loss), Net of Tax	646	(962)	1,229	(740)
Total comprehensive income	862	(549)	1,768	140
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	636	(921)	1,158	(713)
Accumulated Other-than-Temporary Impairment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	5	1	(3)	(2)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	16	(55)	70	(28)
Accumulated Translation Adjustment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	(19)	4	(13)	(16)
Accumulated Defined Benefit Plans Adjustment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	$ 8	$ 9	$ 17	$ 19