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Reinsurance - Schedule IV
 12 Months Ended
Dec. 31, 2018
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]  
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Text Block]
Schedule IV
Cincinnati Financial Corporation and Subsidiaries
Reinsurance
(Dollars in millions)
 
Years ended December 31,
 
 
2018
 
2017
 
2016
Gross amounts:
 
 

 
 

 
 

Life insurance in force
 
$
104,726

 
$
99,888

 
$
95,533

Earned premiums
 
 

 
 

 
 

Commercial lines insurance
 
$
3,314

 
$
3,258

 
$
3,180

Personal lines insurance
 
1,372

 
1,275

 
1,195

Excess and surplus lines insurance
 
245

 
219

 
192

Cincinnati Re
 
—

 
—

 
—

Total property casualty insurance
 
4,931

 
4,752

 
4,567

Life insurance
 
320

 
300

 
290

Total
 
$
5,251

 
$
5,052

 
$
4,857

 
 
 
 
 
 
 
Ceded amounts to other companies:
 
 

 
 

 
 

Life insurance in force
 
$
38,584

 
$
38,711

 
$
38,724

Earned premiums
 
 

 
 

 
 

Commercial lines insurance
 
$
104

 
$
99

 
$
98

Personal lines insurance
 
37

 
35

 
35

Excess and surplus lines insurance
 
11

 
10

 
9

Cincinnati Re
 
8

 
18

 
20

Total property casualty insurance
 
160

 
162

 
162

Life insurance
 
70

 
68

 
62

Total
 
$
230

 
$
230

 
$
224

 
 
 
 
 
 
 
Assumed amounts from other companies:
 
 

 
 

 
 

Life insurance in force
 
$
—

 
$
—

 
$
—

Earned premiums
 
 

 
 

 
 

Commercial lines insurance
 
$
8

 
$
6

 
$
7

Personal lines insurance
 
1

 
1

 
1

Excess and surplus lines insurance
 
—

 
—

 
—

Cincinnati Re
 
140

 
125

 
69

Total property casualty insurance
 
149

 
132

 
77

Life insurance
 
—

 
—

 
—

Total
 
$
149

 
$
132

 
$
77

 
 
 
 
 
 
 
Net amounts:
 
 

 
 

 
 

Life insurance in force
 
$
66,142

 
$
61,177

 
$
56,808

Earned premiums
 
 

 
 

 
 

Commercial lines insurance
 
$
3,218

 
$
3,165

 
$
3,089

Personal lines insurance
 
1,336

 
1,241

 
1,161

Excess and surplus lines insurance
 
234

 
209

 
183

Cincinnati Re
 
132

 
107

 
49

Total property casualty insurance
 
4,920

 
4,722

 
4,482

Life insurance
 
250

 
232

 
228

Total
 
$
5,170

 
$
4,954

 
$
4,710

 
 
 
 
 
 
 
Percentage of amounts assumed to net:
 
 

 
 

 
 

Life insurance in force
 
—
%
 
—
%
 
—
%
Earned premiums
 
 

 
 

 
 

Commercial lines insurance
 
0.3
%
 
0.2
%
 
0.2
%
Personal lines insurance
 
0.1

 
0.1

 
0.1

Excess and surplus lines insurance
 
—

 
—

 
—

Cincinnati Re
 
106.1

 
116.1

 
140.8

Total property casualty insurance
 
3.0

 
2.8

 
1.7

Life insurance
 
—

 
—

 
—

Total
 
2.9

 
2.7

 
1.6