Stockholders Equity (Narrative) (Details)			1 Months Ended		12 Months Ended
	Nov. 11, 2019 $ / shares	Nov. 06, 2019 USD ($)	Jan. 31, 2020 $ / shares shares	Nov. 30, 2019 USD ($) shares	Jun. 30, 2020 USD ($) Class Vote Holder $ / shares shares	Jun. 30, 2019 $ / shares shares	Mar. 19, 2019 $ / shares
Stockholders Equity [Line Items]
Common stock, number of classes | Class					2
Stock repurchase program, number of shares repurchased during the period | shares					17,000,000
Stock repurchase program, value of shares repurchased during the period					$ 600,000,000
Stock repurchase program, remaining buyback authorization amount					$ 1,400,000,000
Class B Common Stock
Stockholders Equity [Line Items]
Number of votes | Vote					1
Number of holders of shares | Holder					4,900
Series common stock, shares authorized | shares					1,000,000,000	1,000,000,000
Series common stock, par value | $ / shares					$ 0.01	$ 0.01	$ 0.01
Share repurchase program, amount intended to promptly repurchase		$ 150,000,000
Stock repurchase program, number of shares repurchased during the period | shares					5,000,000
Stock repurchase program, value of shares repurchased during the period					$ 178,000,000
Class B Common Stock | Maximum | Stockholders Agreement | Murdoch Family Trust
Stockholders Equity [Line Items]
Outstanding voting power, percentage		44.00%
Percentage of voting power increase in any rolling twelve-month period		1.75%
Class A Common Stock
Stockholders Equity [Line Items]
Number of holders of shares | Holder					18,500
Series common stock, shares authorized | shares					2,000,000,000	2,000,000,000
Series common stock, par value | $ / shares					$ 0.01	$ 0.01	$ 0.01
Accelerated share repurchases agreement, amount		$ 350,000,000
Accelerated share repurchases, amount of payment to third party financial institution				$ 350,000,000
Stock repurchase program, number of shares repurchased during the period | shares			2,000,000	8,000,000	2,000,000
Accelerated share repurchases, percentage of shares expected to be repurchased				80.00%
Accelerated share repurchases, initial price paid per share | $ / shares	$ 34.99
Accelerated share repurchases, final price paid per share | $ / shares			$ 36.05
Stock repurchase program, value of shares repurchased during the period					$ 72,000,000
Series Common Stock
Stockholders Equity [Line Items]
Series common stock, shares authorized | shares					35,000,000
Series common stock, par value | $ / shares					$ 0.01
Preferred stock
Stockholders Equity [Line Items]
Preferred stock, shares authorized | shares					35,000,000
Preferred stock, par value | $ / shares					$ 0.01
Class A and Class B Common Stock
Stockholders Equity [Line Items]
Stock repurchase program, authorized amount		$ 2,000,000,000