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Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities - Investments Measured at Fair Value On A Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Jul. 01, 2020
Fair value of marketable securities      
Debt securities $ 786,000    
Contractual maturities extending longer than one year through and including five years 3,000    
Derivative's fair value 1,656,000 $ 1,693,000  
Fair value measurements on recurring basis      
Fair value of marketable securities      
Cash Equivalents (including restricted) 815,719 1,620,458  
Total 788,847 877,672  
Fair value measurements on recurring basis | U.S. Treasury and agency securities      
Fair value of marketable securities      
Total 2,621 22,824  
Fair value measurements on recurring basis | Commercial paper      
Fair value of marketable securities      
Total 756,225 696,324  
Fair value measurements on recurring basis | Corporate securities      
Fair value of marketable securities      
Total 27,428 156,380  
Fair value measurements on recurring basis | Other (including restricted)      
Fair value of marketable securities      
Total 2,490 1,489  
Fair value measurements on recurring basis | Equity securities      
Fair value of marketable securities      
Equity securities 83 655  
Fair value measurements on recurring basis | Level 1      
Fair value of marketable securities      
Cash Equivalents (including restricted) 191,145 174,050  
Total 2,704 23,479  
Fair value measurements on recurring basis | Level 1 | U.S. Treasury and agency securities      
Fair value of marketable securities      
Total 2,621 22,824  
Fair value measurements on recurring basis | Level 1 | Equity securities      
Fair value of marketable securities      
Equity securities 83 655  
Fair value measurements on recurring basis | Level 2      
Fair value of marketable securities      
Cash Equivalents (including restricted) 624,574 1,446,408  
Total 785,999 854,049  
Fair value measurements on recurring basis | Level 2 | Commercial paper      
Fair value of marketable securities      
Total 756,225 696,324  
Fair value measurements on recurring basis | Level 2 | Corporate securities      
Fair value of marketable securities      
Total 27,428 156,380  
Fair value measurements on recurring basis | Level 2 | Other (including restricted)      
Fair value of marketable securities      
Total 2,346 1,345  
Fair value measurements on recurring basis | Level 3      
Fair value of marketable securities      
Total 144 144  
Fair value measurements on recurring basis | Level 3 | Other (including restricted)      
Fair value of marketable securities      
Total 144 $ 144  
Boost Mobile Acquisition      
Fair value of marketable securities      
Spectrum purchase option fair value     $ 713,000
Spectrum Purchase Agreement      
Fair value of marketable securities      
Termination fee $ 72,000