Significant Reconciling Items (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Mar. 31, 2012		Mar. 31, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ 6,374		$ 5,709		$ 21,571		$ 20,990
Reconciling amounts
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	(1,359)		(1,160)		(3,548)		(2,805)
Reconciling amounts | Corporate-level activity
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	(1,378)	[1]	(1,182)	[1]	(3,625)	[1]	(3,145)	[1]
Reconciling amounts | Revenue reconciling amounts
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	6		14		59		363
Reconciling amounts | Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ 13		$ 8		$ 18		$ (23)

[1] Corporate-level activity excludes revenue reconciling amounts presented separately in that line item.