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Debt - Assets and Liabilities Related to Asset-backed Debt Arrangements (Detail) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]    
Prepaid expenses and other $ 8,197 $ 7,607
Other assets 19,258 19,885
Accounts payable and accrued liabilities 20,139 23,453
Debt maturing within one year 15,594 12,973
Long-term debt 136,104 137,701
Variable Interest Entity, Primary Beneficiary    
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]    
Accounts receivable, net 15,557 14,550
Prepaid expenses and other 1,389 1,288
Other assets 12,217 11,682
Accounts payable and accrued liabilities 31 29
Debt maturing within one year 7,777 7,483
Long-term debt $ 15,514 $ 14,700