Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015		Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax			$ (7,662)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(6,263)	[1]
Reclassifications out of Accumulated Other Comprehensive Income			74
Other Comprehensive Income (Loss), Net of Tax	(2,534)	(269)	(6,189)		864
Accumulated Other Comprehensive Income (Loss), Net of Tax	(13,851)		(13,851)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax			(3,876)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			1,692	[1]
Reclassifications out of Accumulated Other Comprehensive Income			(139)
Other Comprehensive Income (Loss), Net of Tax			1,553
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,323)		(2,323)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax			(18)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			28	[1]
Reclassifications out of Accumulated Other Comprehensive Income			(2)
Other Comprehensive Income (Loss), Net of Tax			26
Accumulated Other Comprehensive Income (Loss), Net of Tax	8		8
Pension Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax			(5,165)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			640	[1]
Reclassifications out of Accumulated Other Comprehensive Income			215
Other Comprehensive Income (Loss), Net of Tax			855
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,310)		(4,310)
Foreign Currency Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax			1,397
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(8,623)	[1]
Reclassifications out of Accumulated Other Comprehensive Income			0
Other Comprehensive Income (Loss), Net of Tax			(8,623)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,226)		(7,226)
Reclassification out of AOCI - Components [Domain]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of Accumulated Other Comprehensive Income	$ 59	$ 69	$ 74		$ 123

[1] Net of tax expense/(benefit) of $938, $1 and $231 for hedges, investment securities, and pension and other retiree benefits plans, respectively.