Sale of Accounts Receivable (Details) (USD $)	4 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Sale of Accounts Receivable [Abstract]
Maximum amount provided under accounts receivable securitization facility excluded in lines of credit	$ 1,000,000,000	$ 1,000,000,000
Receivables sold under securitization facility derecognized during the period	1,600,000,000	1,600,000,000
Cash payments received in exchange for the transfer of accounts receivable		1,000,000,000
Proceeds received in cash from transfers of receivables to purchasers	8,900,000,000
Risk of loss on sale of accounts receivable	600,000,000	600,000,000
Loss on transfer of accounts receivables to purchasers		$ 4,000,000