Intangible Assets - Narrative (Details) $ in Millions		12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2022 USD ($) license	Dec. 31, 2021 USD ($) license	Dec. 31, 2020 USD ($)
Licenses
Cash paid for licenses		$ 585	$ 1,302	$ 171
Auction 107
Licenses
Licenses won | license			254
Total winning bid			$ 1,283
FCC Upfront Payment				$ 30
Cash paid for licenses		8	36
Auction 107 | Other current liabilities
Licenses
Short-term spectrum license liabilities		133	17
Auction 107 | Other deferred liabilities and credits
Licenses
Long-term spectrum license liabilities		$ 8	128
Auction 107 | Subsequent event
Licenses
Cash paid for licenses	$ 185
Auction 110
Licenses
Licenses won | license		380
Total winning bid		$ 580
FCC Upfront Payment			$ 20