Accumulated Other Comprehensive Income Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ (7,499)	[1]
Other Comprehensive Income Before Reclassification	709	[1],[2]
Reclassifications out of Accumulated Other Comprehensive Income	59	[1]
Other Comprehensive Income (Loss), Net of Tax	768	[1]	1,154
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(6,731)	[1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(3,529)	[1]
Other Comprehensive Income Before Reclassification	(240)	[1],[2]
Reclassifications out of Accumulated Other Comprehensive Income	1	[1]
Other Comprehensive Income (Loss), Net of Tax	(239)	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(3,768)	[1]
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(27)	[1]
Other Comprehensive Income Before Reclassification	14	[1],[2]
Reclassifications out of Accumulated Other Comprehensive Income	0	[1]
Other Comprehensive Income (Loss), Net of Tax	14	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(13)	[1]
Pension Plans, Defined Benefit [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(4,296)	[1]
Other Comprehensive Income Before Reclassification	(114)	[1],[2]
Reclassifications out of Accumulated Other Comprehensive Income	58	[1]
Other Comprehensive Income (Loss), Net of Tax	(56)	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(4,352)	[1]
Foreign Currency Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	353	[1]
Other Comprehensive Income Before Reclassification	1,049	[1],[2]
Reclassifications out of Accumulated Other Comprehensive Income	0	[1]
Other Comprehensive Income (Loss), Net of Tax	1,049	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 1,402	[1]

[1]

[2] Net of tax of $(144), $3 and $(33) for hedges, investment securities, and defined benefit retirement plans, respectively.