Dividends Declared (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Declaration Date	Mar. 09, 2020	Dec. 04, 2019	Sep. 18, 2019	Mar. 11, 2019	Nov. 28, 2018	Sep. 18, 2018
Record Date	May 21, 2020	Feb. 20, 2020	Nov. 21, 2019	May 16, 2019	Feb. 21, 2019	Nov. 15, 2018
Payment Date	Jun. 11, 2020	Mar. 12, 2020	Dec. 12, 2019	Jun. 13, 2019	Mar. 14, 2019	Dec. 13, 2018
Dividend Per Share	$ 0.51	$ 0.51	$ 0.51	$ 0.46	$ 0.46	$ 0.46	$ 1.53	$ 1.38
Amount	$ 3,871	$ 3,876	$ 3,886	$ 3,521	$ 3,526	$ 3,544	$ 11,633	$ 10,591