Dividends Declared (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Dividends [Line Items]
Declaration Date	Jun. 10, 2014	Mar. 11, 2014	Nov. 19, 2013	Sep. 16, 2013	Jun. 12, 2013	Mar. 11, 2013	Nov. 28, 2012	Sep. 18, 2012
Dividend Per Share	$ 0.28	$ 0.28	$ 0.28	$ 0.28	$ 0.23	$ 0.23	$ 0.23	$ 0.23	$ 1.12	$ 0.92	$ 0.80
Record Date	Aug. 21, 2014	May 15, 2014	Feb. 20, 2014	Nov. 21, 2013	Aug. 15, 2013	May 16, 2013	Feb. 21, 2013	Nov. 15, 2012
Total Amount	$ 2,307	$ 2,309	$ 2,322	$ 2,332	$ 1,916	$ 1,921	$ 1,925	$ 1,933
Payment Date	Sep. 11, 2014	Jun. 12, 2014	Mar. 13, 2014	Dec. 12, 2013	Sep. 12, 2013	Jun. 13, 2013	Mar. 14, 2013	Dec. 13, 2012