Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Comprehensive Income
Net Income (Loss) Attributable to Parent	$ 438	$ 381	$ 977	$ 1,261
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	438	381	977	1,261
Other Comprehensive Income (Loss), Net of Tax	87	(48)	1,316	(788)
Total comprehensive income	525	333	2,293	473
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	22	(94)	1,180	(807)
Accumulated Other-than-Temporary Impairment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	5	3	2	1
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	(28)	48	42	20
Accumulated Translation Adjustment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	78	(14)	65	(30)
Accumulated Defined Benefit Plans Adjustment [Member]
Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax	$ 10	$ 9	$ 27	$ 28