Product Warranty Liabilities (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
Warranty Liability [Line Items]
Balance, beginning of period	$ 167	$ 202	$ 172	$ 240
Accruals for warranties issued	12	14	43	46
Settlements of warranty claims	(16)	(31)	(52)	(101)
Balance, end of period	$ 163	$ 185	$ 163	$ 185