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Intangible Assets - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended 39 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
license
Dec. 31, 2020
USD ($)
Dec. 31, 2024
USD ($)
Licenses            
Cash paid for intangible assets $ 5 $ 568        
Auction 107            
Licenses            
Licenses won | license       254    
Total winning bid       $ 1,283    
FCC upfront payment         $ 30  
Cash paid for intangible assets 3   $ 8 $ 36    
Auction 107 | Subsequent event            
Licenses            
Cash paid for intangible assets           $ 185
Auction 107 | UScellular | Other current liabilities            
Licenses            
Short-term spectrum license liabilities $ 139   133      
Auction 107 | UScellular | Other deferred liabilities and credits            
Licenses            
Long-term spectrum license liabilities     $ 8