Investments In Affiliates Accounted For Using The Equity Method (Summary of Carrying Amount and Percentage Ownership of Significant Investments in Affiliates) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Carrying amount	$ 646	$ 581
QVC Group Common Stock
Schedule of Equity Method Investments [Line Items]
Carrying amount	$ 231	224
QVC Group Common Stock | HSN, Inc.
Schedule of Equity Method Investments [Line Items]
Percentage ownership	38.00%
Carrying amount	$ 193	184
QVC Group Common Stock | Other
Schedule of Equity Method Investments [Line Items]
Carrying amount	38	40
Liberty Ventures common stock
Schedule of Equity Method Investments [Line Items]
Carrying amount	415	357
Liberty Ventures common stock | Other
Schedule of Equity Method Investments [Line Items]
Carrying amount	$ 202	141
Liberty Ventures common stock | FTD
Schedule of Equity Method Investments [Line Items]
Percentage ownership	37.00%
Carrying amount	$ 213	$ 216
Fair Value, Inputs (Level 1) | QVC Group Common Stock | HSN, Inc.
Schedule of Equity Method Investments [Line Items]
Market value	639
Fair Value, Inputs (Level 1) | Liberty Ventures common stock | FTD
Schedule of Equity Method Investments [Line Items]
Market value	$ 204