Equity-Based Compensation - Summary of Activity from Continuing and Discontinued Operations Related to Target PSUs and RSUs Settled in Shares (Parenthetical) (Detail) - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted	[1]	3,510	4,502	3,472
Number of shares, Cancelled	[2]	1,354	1,236	2,141
Fair value of PSUs and RSUs vested during the period		$ 25	$ 44	$ 26
Intrinsic value of unvested RSUs and target PSUs		$ 145
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted		300	400	300
Number of shares, Cancelled		100	100	300
Restricted Stock Units [Member] | Settled in Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted		300	400	300
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted		4,400	5,500	4,200
Payout adjustment of performance share units		700	400	200
Number of shares, Cancelled		600	700	800
Payout adjustment of performance share units		700	400	200
Performance Stock Units [Member] | Settled in Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Granted		3,200	4,100	3,000

[1] For fiscal 2018, includes 3.2 million target PSUs and 0.3 million RSUs granted. For fiscal 2017, includes 4.1 million target PSUs and 0.4 million RSUs granted. For fiscal 2016, includes 3.0 million target PSUs and 0.3 million RSUs granted and a payout adjustment of 0.2 million PSUs due to the actual performance level achieved for PSUs granted in fiscal 2013 that vested during fiscal 2016.

[2] For fiscal 2018, includes 0.6 million of target PSUs and 0.1 million RSUs cancelled and a payout adjustment of 0.7 million PSUs due to the actual performance level achieved for PSUs granted in fiscal 2015 that vested during fiscal 2018. For fiscal 2017, includes 0.7 million of target PSUs and 0.1 million RSUs cancelled and a payout adjustment of 0.4 million PSUs due to the actual performance level achieved for PSUs granted in fiscal 2014 that vested during fiscal 2017. For fiscal 2016, includes 0.8 million of target PSUs and 0.3 million RSUs cancelled and a payout adjustment of 1.0 million PSUs due to the actual performance level achieved for PSUs granted in fiscal 2013 that vested during fiscal 2016.