Revenues - Summary of Deferred Revenue from Contract with Customers (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Deferred Revenue [Abstract]
Balance, beginning of period	$ 448	$ 436	$ 428	$ 510
Deferral of revenue	754	742	1,575	1,337
Recognition of deferred revenue	(797)	(747)	(1,591)	(1,417)
Other	6	(1)	(1)	0
Balance, end of period	$ 411	$ 430	$ 411	$ 430