Income Taxes - Newsday and Chicago Cubs Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2015	Sep. 02, 2015	Oct. 27, 2009	Jul. 29, 2008
Newsday LLC
Income Tax Contingency [Line Items]
Payment for income tax, interest and penalties	$ 115
Ownership percentage in common stock by third party							97.00%
Ownership percentage in common stock					3.00%		3.00%
Reduction in deferred income tax liabilities		$ 23
Adjustment to deferred taxes	(3)	91	$ 88
Income taxes paid				$ 136
Deferred tax liability					$ 101
Income tax reserves		$ 125
Expected future payment for income tax, interest and penalties			10
Newsday LLC | Tax Year 2008
Income Tax Contingency [Line Items]
Estimated federal income taxes before interest and penalties			190
IRS, accuracy-related penalty			38
IRS, accuracy-related interest			48
Newsday LLC | Tax Year 2008 | State and Local Jurisdiction
Income Tax Contingency [Line Items]
Estimated state income taxes before interest and penalties			22
New Cubs LLC
Income Tax Contingency [Line Items]
Ownership percentage in common stock by third party						95.00%
Ownership percentage in common stock						5.00%
Income taxes paid			39
Deferred tax liability	$ 160		160
New Cubs LLC | Tax Year 2009
Income Tax Contingency [Line Items]
Estimated federal income taxes before interest and penalties			225
IRS proposed tax			182
IRS proposed gross valuation misstatement penalty			73
After-tax interest on proposed tax and penalty			$ 38