Revenues - Summary of Cumulative Effect and Impact of Adoption ASC 606 and ASC 605 (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jul. 01, 2018	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	$ 2,627	$ 2,180	$ 5,151	$ 4,238
Operating expenses and Selling, general and administrative	(2,257)		(4,423)
Net income (loss)	119	(66)	247	21
Receivables, net	1,853		1,853		$ 1,812	$ 1,612
Other current assets	558		558		368	372
Deferred income tax assets	228		228		281	279
Other non-current assets	912		912		923	831
Deferred revenue	430		430		510	516
Other current liabilities	670		670		566	372
Deferred income tax liabilities	384		384		400	389
Other non-current liabilities	524		524		501	430
Accumulated deficit	(1,937)		(1,937)		(2,143)	$ (2,163)
Circulation and Subscription [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	1,029	637	2,063	1,288
Advertising [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	718	717	1,382	1,399
Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	478	453	878	839
Real Estate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	248	222	475	425
Other [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	154	$ 151	353	$ 287
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	2,647		5,188
Operating expenses and Selling, general and administrative	(2,288)		(4,478)
Net income (loss)	111		234
Receivables, net					1,612
Other current assets					372
Deferred income tax assets					279
Other non-current assets					831
Deferred revenue					516
Other current liabilities					372
Deferred income tax liabilities					389
Other non-current liabilities					430
Accumulated deficit					(2,163)
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member] | Circulation and Subscription [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	1,025		2,057
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member] | Advertising [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	718		1,382
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member] | Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	496		908
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member] | Real Estate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	248		475
ASC 605 [Member] | Accounting Standards Update 2014-09 [Member] | Other [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	160		366
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	(20)		(37)
Operating expenses and Selling, general and administrative	31		55
Net income (loss)	8		13
Receivables, net					200
Other current assets					(4)
Deferred income tax assets					2
Other non-current assets					92
Deferred revenue					(6)
Other current liabilities					194
Deferred income tax liabilities					11
Other non-current liabilities					71
Accumulated deficit					$ 20
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member] | Circulation and Subscription [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	4		6
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member] | Advertising [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	0		0
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member] | Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	(18)		(30)
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member] | Real Estate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	0		0
ASC 606 [Member] | Accounting Standards Update 2014-09 [Member] | Other [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Revenues	$ (6)		$ (13)