Dividends Declared (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Mar. 31, 2017	Mar. 31, 2016
Dividends [Line Items]
Declaration Date	Mar. 14, 2017	Nov. 30, 2016	Sep. 20, 2016	Mar. 15, 2016	Dec. 02, 2015	Sep. 15, 2015
Dividend Per Share	$ 0.39	$ 0.39	$ 0.39	$ 0.36	$ 0.36	$ 0.36	$ 1.17	$ 1.08
Record Date	May 18, 2017	Feb. 16, 2017	Nov. 17, 2016	May 19, 2016	Feb. 18, 2016	Nov. 19, 2015
Total Amount	$ 3,012	$ 3,012	$ 3,024	$ 2,821	$ 2,842	$ 2,868
Payment Date	Jun. 08, 2017	Mar. 09, 2017	Dec. 08, 2016	Jun. 09, 2016	Mar. 10, 2016	Dec. 10, 2015