Earnings (Loss) Per Common Share (Earrings Per Share Basic and Diluted) (Details) - shares shares in Millions	2 Months Ended	3 Months Ended
	Mar. 09, 2018	Mar. 31, 2018	Mar. 31, 2017
QVC Group
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		11	14
Basic EPS (WA shares outstanding)		476	453
Potentially dilutive shares		5	2
Diluted EPS (WA shares outstanding)		481	455
Liberty Ventures common stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2
Basic EPS (WA shares outstanding)	86		85
Potentially dilutive shares	1		1
Diluted EPS (WA shares outstanding)	87		86
Liberty Ventures common stock | Maximum
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1