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Future Policy Benefit Reserves (Tables)
3 Months Ended
Mar. 31, 2023
Insurance [Abstract]  
Liability for Future Policy Benefit, Activity
The following table summarizes balances and changes in the LFPB.

(In millions)
20232022
Present value of future net premiums
Balance, January 1$3,993 $4,735 
     Effect of changes in discount rate(74)(880)
Balance, January 1, at original locked in discount rate3,919 3,855 
     Effect of changes in cash flow assumptions (1)
— — 
     Effect of actual variances from expected experience (1)
(49)(18)
Adjusted balance, January 13,870 3,837 
Interest accrual52 53 
     Net premiums: earned during period(111)(112)
Balance, end of period at original locked in discount rate3,811 3,778 
     Effect of changes in discount rate154 525 
Balance, March 31$3,965 $4,303 
Present value of future benefits & expenses
Balance, January 1$17,472 $22,745 
     Effect of changes in discount rate(125)(5,942)
Balance, January 1, at original locked in discount rate17,347 16,803 
     Effect of changes in cash flow assumptions (1)
— — 
     Effect of actual variances from expected experience (1)
(50)(23)
Adjusted balance, January 117,297 16,780 
Interest accrual242 241 
     Benefit & expense payments(302)(233)
Balance, end of period at original locked in discount rate17,237 16,788 
     Effect of changes in discount rate704 3,517 
Balance, March 31$17,941 $20,305 
Net LFPB$13,976 $16,002 
(1) As of March 31, 2023 and 2022, the re-measurement gain (loss) of $1 million and $5 million presented parenthetically on the Condensed Consolidated Statement of Operations is comprised of the effect of changes in cash flow assumptions and the effect of actual variances from expected experience.
The following table presents undiscounted expected future benefit and expense payments, and undiscounted expected future gross premiums.
As of March 31

(In millions)
20232022
  Expected future benefit and expense payments$33,759 $33,674 
  Expected future gross premiums5,729 5,969 
The weighted average interest rates in the table below are calculated based on the rate used to discount all future cash flows.
As of March 31As of December 31
202320222022
   Original locked in discount rate5.26 %5.31 %5.27 %
Upper-medium grade fixed income instrument discount rate4.92 3.67 5.23