Equity Activity (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 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	(343)		24
Amount reclassified from accumulated other comprehensive income	376		421
Total change for the period	33		446
Balance at the End of the Period	(27,842)		(21,156)
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	401		54
Amount reclassified from accumulated other comprehensive income	(162)		1
Total change for the period	239		55
Balance at the End of the Period	631		(111)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) Net of Tax
Balance at the Beginning of the Period	(1,742)	[1]	332	[1]
Other comprehensive income before reclassifications	(718)	[1]	(51)	[1]
Amount reclassified from accumulated other comprehensive income	0	[1]	0	[1]
Total change for the period	(718)	[1]	(51)	[1]
Balance at the End of the Period	(2,461)	[1]	281	[1]
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	(46)		21
Amount reclassified from accumulated other comprehensive income	538		417
Total change for the period	492		439
Balance at the End of the Period	(26,017)		(21,328)
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	20		0
Amount reclassified from accumulated other comprehensive income	0		3
Total change for the period	20		3
Balance at the End of the Period	$ 5		$ 2

[1] Foreign currency translation adjustments are presented gross except for any associated hedges which are presented net of tax.