Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Income (Loss) Attributable to Parent	$ 4,924	$ 5,555
Comprehensive income	6,625	5,266
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	1,574	(251)
Accumulated Translation Adjustment [Member]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	127	24
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(35)	(79)
Accumulated Defined Benefit Plans Adjustment [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	35	17
Accumulated other comprehensive income/(loss)
Other comprehensive income/(loss), after-tax	$ 1,701	$ (289)