Commitments and Contingencies - Part 2 (Details)						2 Months Ended	3 Months Ended	12 Months Ended
	Jan. 14, 2022 USD ($)	Dec. 19, 2020 USD ($)	Sep. 23, 2016 USD ($)	Aug. 18, 2015 USD ($)	Mar. 13, 2014 USD ($)	Feb. 28, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Feb. 12, 2020 USD ($)	Sep. 27, 2019 USD ($)	Feb. 10, 2016 patent
Loss contingencies
Lease expense								$ 139,000,000	$ 99,000,000	$ 273,000,000
Impairment of long-lived assets									$ 356,418,000
Network development future expenditures								10,000,000,000
Loss contingency terms
Number Of Patents | patent													4
Turner Network Sales, Inc.
Loss contingency terms
Remaining claims, incremental exposure											$ 206,000,000
Ghz 3.45 to 3.55
Loss contingencies
Aggregate bids totaled	$ 7,328,000,000					$ 7,205,000,000
Payment to Federal Communication Commission as Deposit for Auction							$ 123,000,000	$ 7,328,000,000
Northstar Spectrum And SNR Holdco | AWS-3 Licenses
Loss contingencies
Interim Build-out Requirement (as a percent)								40.00%
Final Build-out Requirement (as a percent)								75.00%
Accelerated period to meet Final Build-Out Requirement on failure to meet Interim Build-Out Requirement								2 years
Northstar Wireless or Northstar Spectrum | AWS-3 Licenses
Loss contingency terms
Percentage Of Bidding Credit								25.00%
Northstar Wireless or Northstar Spectrum | AWS-3 Licenses | Vermont National Telephone Company
Loss contingency terms
Percentage Of Bidding Credit			25.00%
Recovery amount			$ 10,000,000,000
Bidding Credit			3,300,000,000
Northstar Wireless or Northstar Spectrum | AWS-3 Licenses | Minimum | Vermont National Telephone Company
Loss contingency terms
Claim amount			5,500
Northstar Wireless or Northstar Spectrum | AWS-3 Licenses | Maximum | Vermont National Telephone Company
Loss contingency terms
Claim amount			$ 11,000
Northstar Wireless or Northstar Spectrum | SNR Licenses
Loss contingency terms
Percentage Of Bidding Credit				25.00%
Northstar Wireless or Northstar Spectrum | Northstar Licenses
Loss contingency terms
Bidding Credit				$ 1,961,000,000
SNR Wireless or SNR Wireless Holdco | SNR Licenses
Loss contingency terms
Percentage Of Bidding Credit								25.00%
Bidding Credit				$ 1,370,000,000
Clear Play Inc [Member]
Loss contingency terms
Claim amount					$ 543,000,000
Litigation With Turner Network Sales Inc
Loss contingency terms
License fee payment												$ 20,000,000
Broadband iTV
Loss contingency terms
Claim amount		$ 162,000,000