Leases - Narrative (Details) ft² in Millions, $ in Millions		12 Months Ended
	Oct. 05, 2018 USD ($) ft² item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Leases
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 49	$ 35	$ 173
Operating lease liability		$ 367	$ 383
Operating lease, existence of option to extend		true
Maximum [Member]
Leases
Renewal term		14 years
QVC | ECDC Lease
Leases
Area of leased building (in square feet) | ft²	1.7
Initial term of lease (in years)	15 years
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 141
Operating lease liability	$ 131
Operating lease, existence of option to extend	true
Maximum number of consecutive terms eligible for extension | item	2
Renewal term	5 years
Final renewal term	4 years
QVC | ECDC Lease | Minimum [Member]
Leases
Operating Lease, rent expenses	$ 10
QVC | ECDC Lease | Maximum [Member]
Leases
Operating Lease, rent expenses	$ 14