Equity-Based Compensation - Summary of Activity from Continuing and Discontinued Operations Related to Target PSUs and RSUs Settled in Shares (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Number of shares
Number of shares, Unvested units at beginning of the year	10,280	9,341	8,652
Number of shares, Granted	4,468	5,445	3,510
Number of shares, Vested	(5,565)	(3,534)	(1,467)
Number of shares, Cancelled	(1,466)	(972)	(1,354)
Number of shares, Unvested units at the end of the year	7,717	10,280	9,341
Weighted average grant- date fair value
Weighted average grant-date fair value, Unvested units at beginning of the year (in dollars per share)	$ 13.70	$ 14.54	$ 15.57
Weighted average grant-date fair value, Granted (in dollars per share)	12.79	12.98	13.47
Weighted average grant-date fair value, Vested (in dollars per share)	14.12	14.72	16.70
Weighted average grant-date fair value, Cancelled (in dollars per share)	10.97	14.02	16.04
Weighted average grant-date fair value, Unvested units at the end of the year (in dollars per share)	$ 13.39	$ 13.70	$ 14.54
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	4,468	5,445	3,510
Fair value of PSUs and RSUs vested during the period	$ 79	$ 52	$ 25
Number of shares, Cancelled	1,466	972	1,354
Intrinsic value of unvested RSUs and target PSUs	$ 130
Restricted Stock Units
Number of shares
Number of shares, Cancelled	(700)	(100)	(100)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Cancelled	700	100	100
Restricted Stock Units | Settled in Stock
Number of shares
Number of shares, Granted	3,300	1,100	300
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	3,300	1,100	300
Performance Stock Units
Number of shares
Number of shares, Granted	2,100	6,000	4,400
Number of shares, Vested	(6,300)	(4,200)	(1,600)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	2,100	6,000	4,400
Payout adjustment of performance share units	400	300	700
Performance Stock Units | 2019 Fiscal
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout adjustment of performance share units	100	500
Performance Stock Units | Settled in Stock
Number of shares
Number of shares, Granted	1,200	4,300	3,200
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	1,100	3,800
Number of shares, Granted	1,200	4,300	3,200
Payout adjustment of performance share units	400	600	600