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Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Segment Information
We present disaggregated disclosures in the Notes below for long-duration insurance balances, applying the level of aggregation by segment as follows:

Business SegmentLevel of Aggregation
AnnuitiesVariable Annuities
Fixed Annuities
Payout Annuities
Life InsuranceTraditional Life
UL and Other
Group ProtectionGroup Protection
Retirement Plan ServicesRetirement Plan Services
The following provides a summary of our DAC, VOBA, DSI and DFEL amortization basis and expected amortization period by segment:

Business SegmentAmortization BasisExpected Amortization Period
AnnuitiesTotal deposits paid to date on policies in forceLife of contract
Life InsurancePolicy count of policies in force
On average 60 years
Group ProtectionGroup certificate contracts in force
4 years
Retirement Plan ServicesLives in force
Life of contract or 40 years
Other business segment and Other Operations information (in millions) was as follows:

For the Years Ended December 31,
202420232022
Net Investment Income
Annuities$1,636 $1,668 $1,463 
Life Insurance2,434 2,712 2,587 
Group Protection348 339 334 
Retirement Plan Services997 1,012 976 
Other Operations110 148 155 
Total net investment income$5,525 $5,879 $5,515