Commitments and Contingencies - Part 2 (Details) person in Millions							9 Months Ended	12 Months Ended
	Sep. 29, 2023 person	Jun. 14, 2023 person	Sep. 23, 2016 USD ($)	Aug. 18, 2015 USD ($)	Jul. 17, 2015 USD ($)	Mar. 14, 2014 USD ($)	Sep. 30, 2023 USD ($) item	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loss contingencies
Number of Americans Nationwide For Deploy FiveG Services | person	100	246
Network development current and future expenditures							$ 10,000,000,000	$ 10,000,000,000	$ 10,000,000,000
Wireless
Loss contingencies
Network development current and future expenditures							$ 10,000,000,000	$ 10,000,000,000	$ 10,000,000,000
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
Loss contingency terms
Percentage of bidding credit							25.00%
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 value			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 value				$ 1,961,000,000
SNR Wireless or SNR Wireless Holdco | SNR Licenses
Loss contingency terms
Percentage of bidding credit							25.00%
Bidding credit value				$ 1,370,000,000
Pending Litigation | ClearPlay
Loss contingency terms
Claim amount						$ 469,000,000
Pending Litigation | TQ Delta
Loss contingency terms
Claim amount					$ 251,000,000
Cyber-Security Class Actions
Loss contingency terms
Ten additional putative class action complaints | item							10