Variable Interest Entities - Nonconsolidated Variable Interest Entities (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total assets	$ 1,555,994	$ 1,601,224	$ 1,463,988
Total liabilities	1,436,704	$ 1,483,353	1,354,062
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets in VIEs	184,515		176,809
Total assets	12,035		9,582
Total liabilities	791		928
Maximum exposure to loss:	22,481		20,384
Retained interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	4,908		3,552
Purchased interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	916		1,071
Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	2,642		2,440
Derivatives | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	8,128		8,682
Debt and equity | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	5,887		4,639
Mortgage-backed | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets in VIEs	129,580		120,343
Total assets	4,892		4,147
Maximum exposure to loss:	4,965		4,199
Mortgage-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	4,483		3,192
Mortgage-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	408		955
Mortgage-backed | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	61		34
Mortgage-backed | Derivatives | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	13		18
Real estate, credit- and power-related and other investing | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets in VIEs	27,198		26,867
Total assets	4,105		3,923
Total liabilities	2		8
Maximum exposure to loss:	6,224		6,017
Real estate, credit- and power-related and other investing | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	2,061		2,030
Real estate, credit- and power-related and other investing | Derivatives | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	61		64
Real estate, credit- and power-related and other investing | Debt and equity | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	4,102		3,923
Corporate debt and other asset-backed | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets in VIEs	20,700		18,391
Total assets	2,757		1,156
Total liabilities	789		920
Maximum exposure to loss:	10,856		9,683
Corporate debt and other asset-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	425		360
Corporate debt and other asset-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	508		116
Corporate debt and other asset-backed | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	367		250
Corporate debt and other asset-backed | Derivatives | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	8,052		8,597
Corporate debt and other asset-backed | Debt and equity | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	1,504		360
Investments in funds | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets in VIEs	7,037		11,208
Total assets	281		356
Maximum exposure to loss:	436		485
Investments in funds | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	153		126
Investments in funds | Derivatives | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	2		3
Investments in funds | Debt and equity | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum exposure to loss:	$ 281		$ 356