Debt - Schedule of Assets and Liabilities Related to Asset-backed Debt Arrangements (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Prepaid expenses and other	$ 8,358	$ 6,906
Other assets	17,260	13,329
Accounts payable and accrued liabilities	23,977	24,833
Debt maturing within one year	9,963	7,443
Long-term debt	140,676	143,425
Variable Interest Entity, Primary Beneficiary
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Accounts receivable, net	13,906	10,705
Prepaid expenses and other	1,409	1,094
Other assets	9,894	5,455
Accounts payable and accrued liabilities	22	10
Debt maturing within one year	6,809	5,024
Long-term debt	$ 13,199	$ 9,178