Contingencies - Additional Information (Detail) In Millions, unless otherwise specified					9 Months Ended
	Mar. 31, 2013 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2013 Imposed Fine USD ($)	Mar. 31, 2013 Imposed Fine EUR (€)	Mar. 31, 2013 Antitrust, Unfair Competition, And Overcharge Class Actions United States USD ($)	Mar. 31, 2013 Contingencies Disclosed in Contingencies Note USD ($)
Loss Contingencies [Line Items]
Maximum value of vouchers to be issued					$ 2,700
Total estimated cost of state overcharge class action cases, minimum					1,900
Total estimated cost of state overcharge class action cases, maximum					2,000
Accrual for loss contingency, ending balance					500
Settlement payments					1,400
Other Current Liabilities	3,913	3,151	733	561
Accrual for disclosed loss contingencies, current, ending balance						419
Accrual for disclosed loss contingencies, noncurrent, ending balance						176
Amount not accrued for estimated maximum losses for disclosed loss contingencies						$ 450