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, 2021	Jun. 30, 2020	Jun. 30, 2019
Number of shares
Number of shares, Unvested units at beginning of the year	7,717	10,280	9,341
Number of shares, Granted	3,546	4,468	5,445
Number of shares, Vested	(3,676)	(5,565)	(3,534)
Number of shares, Cancelled	(565)	(1,466)	(972)
Number of shares, Unvested units at the end of the year	7,022	7,717	10,280
Weighted average grant- date fair value
Weighted average grant-date fair value, Unvested units at beginning of the year (in dollars per share)	$ 13.39	$ 13.70	$ 14.54
Weighted average grant-date fair value, Granted (in dollars per share)	15.59	12.79	12.98
Weighted average grant-date fair value, Vested (in dollars per share)	13.30	14.12	14.72
Weighted average grant-date fair value, Cancelled (in dollars per share)	15.05	10.97	14.02
Weighted average grant-date fair value, Unvested units at the end of the year (in dollars per share)	$ 14.61	$ 13.39	$ 13.70
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	3,546	4,468	5,445
Fair value of PSUs and RSUs vested during the period	$ 49	$ 79	$ 52
Number of shares, Cancelled	565	1,466	972
Restricted Stock Units
Number of shares
Number of shares, Vested	(1,600)
Number of shares, Cancelled	(300)	(700)	(100)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Cancelled	300	700	100
Restricted Stock Units | Settled in Stock
Number of shares
Number of shares, Granted	2,400	3,300	1,100
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	2,400	3,300	1,100
Performance Stock Units
Number of shares
Number of shares, Granted	1,600	2,100	6,000
Number of shares, Vested	(3,600)	(6,300)	(4,200)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	1,600	2,100	6,000
Payout adjustment of performance share units		400	300
Performance Stock Units | Settled in Stock
Number of shares
Number of shares, Granted	800	1,200	4,300
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	800	1,100	3,800
Number of shares, Granted	800	1,200	4,300
Payout adjustment of performance share units	300	400	600
Performance Stock Units | 2019 Fiscal
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout adjustment of performance share units	300	100
Performance Stock Units | 2018 Fiscal
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout adjustment of performance share units			500