Reinsurance - Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Effects of Reinsurance [Line Items]
Premiums receivable	$ 50	$ 47
Reinsurance recoverable	3,682	3,796
Total	3,732	3,843
Future policy benefits and contract owner account balances	47,186	46,974
Liability for funds withheld under reinsurance agreements	88	(5)
Total	47,274	46,969
Direct
Effects of Reinsurance [Line Items]
Premiums receivable	125	121
Reinsurance recoverable	0	0
Total	125	121
Future policy benefits and contract owner account balances	49,757	49,568
Liability for funds withheld under reinsurance agreements	88	(5)
Total	49,845	49,563
Assumed
Effects of Reinsurance [Line Items]
Premiums receivable	12	11
Reinsurance recoverable	0	0
Total	12	11
Future policy benefits and contract owner account balances	1,111	1,202
Liability for funds withheld under reinsurance agreements	0	0
Total	1,111	1,202
Ceded
Effects of Reinsurance [Line Items]
Premiums receivable	(87)	(85)
Reinsurance recoverable	3,682	3,796
Total	3,595	3,711
Future policy benefits and contract owner account balances	(3,682)	(3,796)
Liability for funds withheld under reinsurance agreements	0	0
Total	$ (3,682)	$ (3,796)

The liability as of the balance sheet date for future benefits to be paid to or on behalf of policyholders and expenses, less the present value of future net premiums payable under the insurance contracts and the policy cash accumulations, for the segregated group of participating or dividend-paying policies and contracts identified as a closed block.

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The carrying amount as of the balance sheet date due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, net of the allowance for doubtful accounts.

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Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Amount before valuation allowance recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Reinsurance Liabilities

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