Additional Financial Information - Components of Other, Net Included in Statement of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Line Items]
Remeasurement of equity securities	$ 9	$ 1
Total Other, net	17	4
Nonoperating Income (Expense)
Other Income and Expenses [Line Items]
Remeasurement of equity securities	9	1
Dividends received from equity security investments	2	0
Other	6	3
Total Other, net	$ 17	$ 4