Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Equity Ownership And Carrying Amount) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Equity Method Investments and Operating Activities Segment [Line Items]
Investments in affiliates, accounted for using the equity method	$ 1,244	$ 1,237
Interactive Group
Equity Method Investments and Operating Activities Segment [Line Items]
Investments in affiliates, accounted for using the equity method	362	343
Interactive Group | HSN, Inc.
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	38.00%
Investments in affiliates, accounted for using the equity method	311	293
Interactive Group | Equity method investment, other
Equity Method Investments and Operating Activities Segment [Line Items]
Investments in affiliates, accounted for using the equity method	51	50
Ventures Group
Equity Method Investments and Operating Activities Segment [Line Items]
Investments in affiliates, accounted for using the equity method	882	894
Ventures Group | Expedia
Equity Method Investments and Operating Activities Segment [Line Items]
Percentage ownership	18.00%
Investments in affiliates, accounted for using the equity method	467	477
Ventures Group | Equity method investment, other
Equity Method Investments and Operating Activities Segment [Line Items]
Investments in affiliates, accounted for using the equity method	415	417
Fair Value, Inputs, Level 1 [Member] | Interactive Group | HSN, Inc.
Equity Method Investments and Operating Activities Segment [Line Items]
Equity Method Investment, Quoted Market Value	1,196
Fair Value, Inputs, Level 1 [Member] | Ventures Group | Expedia
Equity Method Investments and Operating Activities Segment [Line Items]
Equity Method Investment, Quoted Market Value	$ 1,673