Commitments, Contingencies, And Guarantees (Narrative) (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Financial Instruments Owned and Pledged as Collateral [Line Items]
Derivative liability subject to a master netting agreement	$ 30	$ 95
Repurchase agreements	1,416	$ 1,418
Purchase Commitment, Remaining Minimum Amount Committed	799
Carrying value of limited partnerships and partially-owned investment companies included in other investments	4,600
Funding commitments relating to limited partnerships and partially-owned investment companies	3,500
Unrecognized tax benefits	13
Operating Lease, Right-of-Use Asset	577
Operating Lease, Liability	$ 617

Carrying value of limited partnerships and partially-owned investment companies included in other investments.

No definition available.

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- Definition

Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

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Amount of lessee's right to use underlying asset under operating lease.

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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

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- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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- Definition

Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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- Definition

Amount of unrecognized tax benefits.

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