Long-lived Assets - Intangible Assets Not Subject to Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	$ 560.8	$ 562.5
Franchise Rights \| Liberty Puerto Rico
Indefinite-lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	$ 540.0	$ 540.0

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant