Investments (Assets on Deposit, Held in Trust and Restricted as to Sale) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets on Deposit, Held in Trust and Restricted as to Sale [Line Items]
Assets on deposit with governmental authorities or trustees	$ 30	$ 27
Assets held in voluntary trusts	58	609
Assets held in trust related to reinsurance and other agreements	14,897	13,259
Securities restricted as to sale	36	40
Total assets on deposit, assets held in trust and securities restricted as to sale	15,021	13,935
Wholly-owned subsidiaries
Assets on Deposit, Held in Trust and Restricted as to Sale [Line Items]
Assets held in trust related to reinsurance and other agreements	$ 21,700	$ 16,100

Assets On Deposit, Held In Trust And Securities Restricted As To Sale

No definition available.

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- Definition

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

+ References

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- Definition

The carrying amount of securities categorized neither as held-to-maturity nor trading which serve as security for borrowings or other arrangements.

+ References

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- Definition

The value of a trust established to hold the stock of an employee compensation and benefits plan as of the balance sheet date.

+ References

No definition available.

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- Definition

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment in the future.

+ References

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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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