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Reserve for Future Policy Benefits (Details) - Annuitization Benefit - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Liability
Beginning balance	$ 713	$ 322
Incurred	72	86
Paid	(101)	(50)
Change in unrealized investment gains and losses	(42)	9
Ending balance	642	713
Reinsurance Recoverable Asset
Beginning balance	26	28
Acquired [2]		346
Incurred	1	(1)
Paid	0	(1)
Ending balance	$ 27	$ 26

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- Definition

Liabilities for Guarantees on Long-Duration Contracts, Acquired Benefits

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Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, as of the balance sheet date.

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Amount of guaranteed minimum benefit expense incurred for expected guaranteed minimum benefits in excess of projected account values.

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Net amount of other increases or decreases to the liability for guaranteed minimum benefits on long-duration contracts occurring during the period.

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Amount of cash outflow to policyholders and contract holders for guaranteed minimum benefit payments.

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Amount of guaranteed minimum benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date.

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