Accumulated Other Comprehensive Income Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			$ (7,499)
Other Comprehensive Income Before Reclassification			741	[1]
Reclassifications out of Accumulated Other Comprehensive Income	69	(9)	123		37
Other Comprehensive Income (Loss), Net of Tax	(269)	(588)	864		1,051
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(6,635)		(6,635)
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)
Other Comprehensive Income Before Reclassification			(274)	[1]
Reclassifications out of Accumulated Other Comprehensive Income			(48)
Other Comprehensive Income (Loss), Net of Tax			(322)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(3,851)		(3,851)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			(27)
Other Comprehensive Income Before Reclassification			9	[1]
Reclassifications out of Accumulated Other Comprehensive Income			(11)
Other Comprehensive Income (Loss), Net of Tax			(2)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(29)		(29)
Pension Plans, Defined Benefit [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			(4,296)
Other Comprehensive Income Before Reclassification			(158)	[1]
Reclassifications out of Accumulated Other Comprehensive Income			182
Other Comprehensive Income (Loss), Net of Tax			24
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(4,272)		(4,272)
Foreign Currency Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			353
Other Comprehensive Income Before Reclassification			1,164	[1]
Reclassifications out of Accumulated Other Comprehensive Income			0
Other Comprehensive Income (Loss), Net of Tax			1,164
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 1,517		$ 1,517

[1] Net of tax (benefit) / expense of $(192), $3 and $(44) for hedges, investment securities, and defined benefit retirement plans, respectively.