v3.26.1
Schedule II Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period $ 3,734 $ 3,596  
Deductions (14,603) (13,970)  
Balance at end of period 4,206 3,734 $ 3,596
Valuation Allowance in Tax Carryforward Losses And Deductions [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 2,017 3,009 3,072
Charged to costs and expenses 1,036 100 161
Deductions (710) (1,093) (224)
Balance at end of period 2,342 2,017 3,009
SEC Schedule 1209 Allowance Credit Loss [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 146 164 162
Charged to costs and expenses 10 35 10
Charged to other accounts (9) (8) (6)
Deductions (13) (46) (2)
Balance at end of period $ 134 $ 146 $ 164