Equity Activity (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period			$ (27,875)	$ (21,602)
Other comprehensive income before reclassifications			(1,319)	(674)
Amount reclassified from accumulated other comprehensive income			1,039	1,299
Total change for the period	$ (724)	$ (609)	(280)	623
Balance at the End of the Period	(28,155)	(20,978)	(28,155)	(20,978)
Net Unrealized Gains/(Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period			392	(165)
Other comprehensive income before reclassifications			301	383
Amount reclassified from accumulated other comprehensive income			(544)	61
Total change for the period			(243)	443
Balance at the End of the Period	148	277	148	277
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period			(1,742)	332
Other comprehensive income before reclassifications			(1,593)	(1,090)
Amount reclassified from accumulated other comprehensive income			0	0
Total change for the period			(1,593)	(1,090)
Balance at the End of the Period	(3,335)	(758)	(3,335)	(758)
Net Change Retirement-Related Benefit Plans
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period			(26,509)	(21,767)
Other comprehensive income before reclassifications			25	32
Amount reclassified from accumulated other comprehensive income			1,583	1,235
Total change for the period			1,608	1,267
Balance at the End of the Period	(24,901)	(20,501)	(24,901)	(20,501)
Net Unrealized Gains/(Losses) on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period			(15)	(1)
Other comprehensive income before reclassifications			(52)	1
Amount reclassified from accumulated other comprehensive income			0	3
Total change for the period			(52)	4
Balance at the End of the Period	$ (67)	$ 3	$ (67)	$ 3