Schedule of Pre-Tax Income (Loss) Effects of Cash Flow Hedges (Detail) - Cash Flow Hedges - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in OCI	$ (391)	$ 309	$ (643)	$ (178)
Gain (loss) reclassified into net income from OCI	56	52	113	104
Gain (loss) recognized in net income (loss)	0	0	0	0
Interest Rate Swaps Hedging Assets \| Net Investment Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in OCI	(405)	314	(655)	(215)
Gain (loss) reclassified into net income from OCI	57	52	112	104
Gain (loss) recognized in net income (loss)	0	0	0	0
Interest Rate Swaps Hedging Assets \| Net Investment Gains (Losses)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in OCI			0
Gain (loss) reclassified into net income from OCI			2
Gain (loss) recognized in net income (loss)			0
Interest Rate Swaps Hedging Liabilities \| Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in OCI	0	(8)	0	36
Gain (loss) reclassified into net income from OCI	(1)	0	(2)	0
Gain (loss) recognized in net income (loss)	0	0	0	0
Foreign currency swaps \| Net Investment Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in OCI	14	3	12	1
Gain (loss) reclassified into net income from OCI	0	0	1	0
Gain (loss) recognized in net income (loss)	$ 0	$ 0	$ 0	$ 0

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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