Revenues - Summary of Deferred Revenue from Contract with Customers (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Liability [Roll Forward]
Balance, beginning of period	$ 409	$ 448	$ 398	$ 428
Deferral of revenue	755	754	1,462	1,575
Recognition of deferred revenue	(779)	(797)	(1,480)	(1,591)
Other	15	6	20	(1)
Balance, end of period	400	411	400	411
Deferred Revenue
Contract with Customer, Liability [Roll Forward]
Deferred revenue recognized	$ 237	$ 232	$ 331	$ 329