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Basis of Presentation and Significant Accounting Policies Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block] | Impact of Adoption on Consolidated Balance Sheet
| Balance as of January 1, 2020
| Opening Balance | Cumulative Effect of Accounting Change | Adjusted Opening Balance
Mortgage loans | $ | 4,215 |  |  | $ | 4,215 |
ACL on mortgage loans | — |  | $ | (19) |  | (19) |
Mortgage loans, net of ACL | 4,215 |  | (19) |  | 4,196 |
Premiums receivable and agents’ balances | 4,529 |  |  | 4,529 |
ACL on premiums receivable and agents' balances | (145) |  | 23 |  | (122) |
Premiums receivable and agents' balances, net of ACL | 4,384 |  | 23 |  | 4,407 |
Reinsurance recoverables | 5,641 |  |  | 5,641 |
ACL and allowance for disputed amounts on reinsurance recoverables | (114) |  | (2) |  | (116) |
Reinsurance recoverables, net of allowance for uncollectible reinsurance | 5,527 |  | (2) |  | 5,525 |
Deferred income tax asset, net | 299 |  | 5 |  | 304 |
Other liabilities | (5,157) |  | (25) |  | (5,182) |
Retained Earnings | $ | 12,685 |  | $ | (18) |  | $ | 12,667 |
Summary of Adoption Impacts
Net increase to ACL and LCL | $ | (23) |
Net tax effects | 5 |
Net decrease to retained earnings | $ | (18) |

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