Fair Value Measurements (Details)	Sep. 30, 2021
Measurement Input, Weighted Average Cost Of Capital \| VMED O2 JV
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Initial investment percent	0.069

Value of input used to measure alternative investment.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

Name:	us-gaap_AlternativeInvestmentMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant