Acquisitions (Details) $ in Thousands, customer in Millions					12 Months Ended
	May 01, 2021 item	Jul. 01, 2020 USD ($) customer	Apr. 01, 2020	Jul. 26, 2019 USD ($)	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Sep. 11, 2020 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 218,000
Annual Lease payment							$ 56,000
Master Network Service Agreement
Business Acquisition [Line Items]
Maximum permitted ownership percent					50.00%
Master Network Service Agreement Period					7 years
Service Receipt Period					2 years
Service receipt period					2 years
Provision For New User After Change Of Control					6 months
Threshold Ownership Percentage Of Not Permitted Owners					50.00%
service pass through costs and out of pocket expenses charging period					36 months
Percentage Of Wireless Communication Business Assets Are Sold					50.00%
Percentage Of Voting Power Or Economic Value Held By Restricted Persons					50.00%
Option Agreement
Business Acquisition [Line Items]
Spectrum Lease Period				6 years
Number of cell sites | item					20,000
Number of retail stores | item					400
Period in which cell sites are scheduled to be decommissioned					5 years
Option agreement term					5 years
Percentage of purchase price				10.00%
Percentage of population served				20.00%
Period in which at least 20% of population served to avoid payment of damages				3 years
Period obliged to provide DOJ with description of deployment efforts				180 days
Damages To Be Paid In Case Of Breach Of Agreement				$ 360,000
Transition Services Agreement
Business Acquisition [Line Items]
Transaction Agreements Period After Provision New Or Existing Customers Of Prepaid Business		2 years
Transition Services Agreement Provided At Cost Period		2 years
Spectrum Purchase Agreement
Business Acquisition [Line Items]
Period of spectrum divestiture extend					60 days
Period within which divesture to be completed after receipt of FCC approval					3 years
Threshold divesture deadline extension period					5 days
Spectrum lease back period					2 years
per-Pop rate					$ 68,000
Decrease in purchase price due to failure to complete rebanding activities					72,000
Damages sought value in case of breach of agreement					$ 72,000
Minimum
Business Acquisition [Line Items]
Useful life					1 year
Maximum
Business Acquisition [Line Items]
Useful life					20 years
600 MHz Licenses | Maximum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				75.00%
AWS-4 Satellites | Option Agreement
Business Acquisition [Line Items]
Damages To Be Paid In Case Of Breach Of Agreement				$ 2,200,000
AWS-4 Satellites | Minimum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				20.00%
AWS-4 Satellites | Maximum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				70.00%
700 MHz Licenses | Minimum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				20.00%
700 MHz Licenses | Maximum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				70.00%
AWS H Block licenses | Minimum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				20.00%
AWS H Block licenses | Maximum
Business Acquisition [Line Items]
Percent Of Coverage On Available Licensed Geographic Areas				70.00%
Aws4 And 600 Mhz
Business Acquisition [Line Items]
No sale agreement period					6 years
Spectrum Purchase Agreement
Business Acquisition [Line Items]
Purchase price				$ 3,590,000
Spectrum Purchase Agreement | Spectrum Purchase Agreement
Business Acquisition [Line Items]
Spectrum Purchase Application Deadline					3 years
Option Agreement
Business Acquisition [Line Items]
Term of final judgement from the date of its entry with the District Court			7 years	7 years
Period Within Entry Of Final Judgment			5 years
Term of final judgement if DOJ gives notice			5 years
Boost Mobile Acquisition
Business Acquisition [Line Items]
Number Of Retail Wireless Subscribers Acquired | item					9,000,000
Total consideration		$ 1,346,024
Trade accounts receivable and allowance for credit losses		539,000
Allowance for credit losses		24,000
Inventory		141,718
Amount of below market contracts acquired as intangible assets		37,000
Spectrum purchase option fair value		713,000			$ 713,000
Intangibles		591,000
Goodwill		$ 91,220
Boost Mobile Acquisition | Minimum
Business Acquisition [Line Items]
Number Of Retail Wireless Subscribers Acquired | customer		9
Useful life		1 year			1 year
Boost Mobile Acquisition | Maximum
Business Acquisition [Line Items]
Useful life		10 years			10 years
Boost Mobile Acquisition | Customer relationships
Business Acquisition [Line Items]
Intangibles		$ 458,000
Boost Mobile Acquisition | Trade Names [Member]
Business Acquisition [Line Items]
Intangibles		$ 96,000
Republic Wireless Acquisition
Business Acquisition [Line Items]
Number Of Retail Wireless Subscribers Acquired | item	200,000				200,000