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Reinsurance - Schedule IV
 12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]  
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Text Block]
Schedule IV
Cincinnati Financial Corporation and Subsidiaries
Reinsurance
(Dollars in millions)Years ended December 31,
 202120202019
Gross amounts:   
Life insurance in force$116,697 $111,756 $108,130 
Earned premiums   
Commercial lines insurance$3,777 $3,578 $3,421 
Personal lines insurance1,586 1,503 1,446 
Excess and surplus lines insurance417 341 292 
Other216 201 181 
Total property casualty insurance5,996 5,623 5,340 
Life insurance374 362 341 
Total$6,370 $5,985 $5,681 
Ceded amounts to other companies:   
Life insurance in force$39,204 $38,281 $38,146 
Earned premiums   
Commercial lines insurance$115 $109 $109 
Personal lines insurance45 41 43 
Excess and surplus lines insurance19 16 14 
Other76 51 39 
Total property casualty insurance255 217 205 
Life insurance76 73 71 
Total$331 $290 $276 
Assumed amounts from other companies:   
Life insurance in force$— $— $— 
Earned premiums   
Commercial lines insurance$12 $7 $7 
Personal lines insurance1 1 1 
Excess and surplus lines insurance— — — 
Other430 277 191 
Total property casualty insurance443 285 199 
Life insurance— — — 
Total$443 $285 $199 
Net amounts:   
Life insurance in force$77,493 $73,475 $69,984 
Earned premiums   
Commercial lines insurance$3,674 $3,476 $3,319 
Personal lines insurance1,542 1,463 1,404 
Excess and surplus lines insurance398 325 278 
Other570 427 333 
Total property casualty insurance6,184 5,691 5,334 
Life insurance298 289 270 
Total$6,482 $5,980 $5,604 
Percentage of amounts assumed to net:   
Life insurance in force— %— %— %
Earned premiums   
Commercial lines insurance0.3 %0.2 %0.2 %
Personal lines insurance0.1 0.1 0.1 
Excess and surplus lines insurance— — — 
Other75.4 64.9 57.4 
Total property casualty insurance7.2 5.0 3.7 
Life insurance— — — 
Total6.8 4.8 3.6