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Basis of Presentation (Details) $ in Millions			3 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 18, 2020 shares	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Liberty
Reimbursable amount			$ 3.5	$ 1.1
Qurate Retail
Tax sharing receivable	$ 119.0		110.0
Qurate Retail | Other current assets
Tax sharing receivable	$ 24.4		$ 23.7
CEO | Liberty
CEO compensation allocation percentage	18.00%
Series A Cumulative Redeemable Preferred Stock
Number of shares received | shares		1
GCI Liberty Inc
Business combination shares issued ratio		0.580

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- Definition

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- Definition

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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