Equity Activity (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 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			(246)	379
Amount reclassified from accumulated other comprehensive income			690	853
Total change for the period	$ 411	$ 787	444	1,232
Balance at the End of the Period	(27,432)	(20,369)	(27,432)	(20,369)
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			274	41
Amount reclassified from accumulated other comprehensive income			(368)	24
Total change for the period			(94)	64
Balance at the End of the Period	298	(101)	298	(101)
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			(549)	307
Amount reclassified from accumulated other comprehensive income			0	0
Total change for the period			(549)	307
Balance at the End of the Period	(2,292)	639	(2,292)	639
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			19	31
Amount reclassified from accumulated other comprehensive income			1,058	825
Total change for the period			1,077	857
Balance at the End of the Period	(25,433)	(20,910)	(25,433)	(20,910)
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			10	1
Amount reclassified from accumulated other comprehensive income			0	3
Total change for the period			10	3
Balance at the End of the Period	$ (5)	$ 3	$ (5)	$ 3