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Intangible Assets - Narrative (Details) $ in Millions		9 Months Ended		12 Months Ended			42 Months Ended
	Oct. 01, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) license	Dec. 31, 2020 USD ($)	Mar. 31, 2025 USD ($)
Licenses
Cash paid for licenses		$ 24	$ 575
Auction 107
Licenses
Licenses won | license					254
Total winning bid					$ 1,283
Cash paid for licenses		17		$ 8	$ 36
FCC upfront payment						$ 30
Auction 107 | Other current liabilities
Licenses
Short-term spectrum license liabilities		13		133
Auction 107 | Other deferred liabilities and credits
Licenses
Long-term spectrum license liabilities				$ 8
Auction 107 | Accounts payable
Licenses
Short-term spectrum license liabilities		$ 105
Auction 107 | Subsequent event
Licenses
Cash paid for licenses	$ 105						$ 179

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

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