Revenues - Summary of Deferred Revenue from Contract with Customers (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Recognition of deferred revenue	$ 797	$ 747	$ 1,591	$ 1,417
Deferred Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Recognition of deferred revenue	$ 232	$ 267	$ 329	$ 421