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Intangible Assets - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) license	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) license	Sep. 30, 2023 USD ($)	Jun. 30, 2024 license	Dec. 31, 2023 USD ($)
Licenses
FCC Licenses, number of accounting units | license	12		12		2
Loss on impairment of licenses	$ 136	$ 0	$ 136	$ 0
Licenses	$ 4,586		$ 4,586			$ 4,702
Minimum
Licenses
Wireless spectrum license fair value exceeds carrying value	9.00%		9.00%
Maximum
Licenses
Wireless spectrum license fair value exceeds carrying value	80.00%		80.00%
High-band spectrum
Licenses
Licenses	$ 161		$ 161

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Amount by which the fair value of wireless spectrum licenses exceeds their respective carrying value.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit.

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