Investments In Affiliates Accounted For Using The Equity Method (Summary of Share Earnings (Losses) of Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	May 18, 2016
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	$ (9)	$ (2)	$ (36)	$ 1
Investment in Affiliate	$ 3,703		$ 3,703		$ 3,161
Liberty Broadband
Schedule of Equity Method Investments [Line Items]
Investment in Affiliate						$ 2,400
Ownership Interest In Investee	23.00%		23.00%
QVC Group Common Stock
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	$ 6	9	$ 20	30
QVC Group Common Stock | HSN, Inc.
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	7	10	23	32
QVC Group Common Stock | Other
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	(1)	(1)	(3)	(2)
Liberty Ventures common stock
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	(15)	(11)	(56)	(29)
Investment in Affiliate	3,703		3,703
Liberty Ventures common stock | FTD
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net		2	(5)	(1)
Liberty Ventures common stock | Other
Schedule of Equity Method Investments [Line Items]
Share of earnings (losses) of affiliates, net	$ (15)	$ (13)	$ (51)	$ (28)