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Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Device Payment Plan Agreement Receivables (Detail) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Receivables [Abstract] |  |
Device payment plan agreement receivables, gross | $ 29,296 | $ 29,206
Unamortized imputed interest | (799) | (758)
Device payment plan agreement receivables, at amortized cost | 28,497 | 28,448
Allowance | (1,194) | (1,151)
Device payment plan agreement receivables, net | 27,303 | 27,297
Accounts receivable, net | 13,696 | 13,173
Other assets | $ 13,607 | $ 14,124

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