Subsequent Events (Narrative) (Details) - Subsequent Event $ in Millions		1 Months Ended
	Nov. 06, 2019 USD ($) TelevisionStation	Oct. 31, 2019 USD ($)	Oct. 31, 2019 AUD ($)
Nexstar | Pending Transaction Not Yet Completed
Subsequent Event [Line Items]
Number of television stations acquired | TelevisionStation	3
Business acquisition, purchase price	$ 350,000,000
Number of television stations agreed to sell | TelevisionStation	2
Disposition, sale price	$ 45,000,000
Credible
Subsequent Event [Line Items]
Business acquisition, percentage of equity acquired		67.00%	67.00%
Payments to acquire businesses, gross		$ 260,000,000	$ 390
Maximum capital to be committed		$ 75,000,000
Period over which capital will be committed		2 years	2 years
Class A Common Stock and Class B Common Stock
Subsequent Event [Line Items]
Stock repurchase program, authorized amount	2,000,000,000
Class A Common Stock
Subsequent Event [Line Items]
Stock repurchase program, accelerated share repurchase amount	350,000,000
Class B Common Stock
Subsequent Event [Line Items]
Share repurchase program, amount intended to promptly repurchase	$ 150,000,000
Class B Common Stock | Maximum | Stockholders Agreement | Murdoch Family Trust
Subsequent Event [Line Items]
Outstanding voting power, percentage	44.00%
Percentage of voting power increase in any rolling twelve-month period	1.75%