Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	$ 176	$ (899)	$ (355)
Unrealized gains (losses)	(1,396)	1,181	(597)
(Gains) losses reclassified to earnings	33	11	71
Tax effect	280	(117)	(18)
Net of tax amount	(1,083)	1,075	(544)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(907)	176	(899)
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	509	(350)	207
Unrealized gains (losses)	(745)	859	(557)
Tax effect	60
Net of tax amount	(685)	859	(557)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(176)	509	(350)
Deferred Gain (Loss) On Hedging Activities [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	29	30	(13)
Unrealized gains (losses)	44	43	46
(Gains) losses reclassified to earnings	(8)	(46)	24
Tax effect	(15)	2	(27)
Net of tax amount	21	(1)	43
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	50	29	30
Pension Liability Adjustment [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	(419)	(613)	(556)
Unrealized gains (losses)	(619)	230	(123)
(Gains) losses reclassified to earnings	54	70	41
Tax effect	202	(106)	25
Net of tax amount	(363)	194	(57)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(782)	(419)	(613)
Unrealized Gain (Loss) On Investments [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	57	34	7
Unrealized gains (losses)	(77)	49	37
(Gains) losses reclassified to earnings	(13)	(13)	6
Tax effect	34	(13)	(16)
Net of tax amount	(56)	23	27
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	$ 1	$ 57	$ 34