Debt - Assets and Liabilities Related to Asset-backed Debt Arrangements (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Prepaid expenses and other	$ 7,503	$ 8,358
Other assets	17,856	17,260
Accounts payable and accrued liabilities	20,067	23,977
Debt maturing within one year	14,827	9,963
Long-term debt	137,871	140,676
Variable Interest Entity, Primary Beneficiary
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Accounts receivable, net	14,143	13,906
Prepaid expenses and other	1,469	1,409
Other assets	11,468	9,894
Accounts payable and accrued liabilities	24	22
Debt maturing within one year	9,593	6,809
Long-term debt	$ 11,749	$ 13,199