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Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2018
Reinsurance Disclosures [Abstract]  
Property Casualty Insurance Assumed And Ceded Business
The table below summarizes our consolidated property casualty insurance net written premiums, earned premiums and incurred loss and loss expenses:
(Dollars in millions)
 
Years ended December 31,
 
 
2018
 
2017
 
2016
Direct written premiums
 
$
5,018

 
$
4,854

 
$
4,646

Assumed written premiums
 
173

 
125

 
103

Ceded written premiums
 
(161
)
 
(139
)
 
(169
)
Net written premiums
 
$
5,030

 
$
4,840

 
$
4,580

 
 
 
 
 
 
 
Direct earned premiums
 
$
4,931

 
$
4,752

 
$
4,567

Assumed earned premiums
 
149

 
132

 
77

Ceded earned premiums
 
(160
)
 
(162
)
 
(162
)
Earned premiums
 
$
4,920

 
$
4,722

 
$
4,482

 
 
 
 
 
 
 
Direct incurred loss and loss expenses
 
$
3,188

 
$
2,961

 
$
2,874

Assumed incurred loss and loss expenses
 
125

 
113

 
43

Ceded incurred loss and loss expenses
 
(90
)
 
64

 
(56
)
Incurred loss and loss expenses
 
$
3,223

 
$
3,138

 
$
2,861

 
 
 
 
 
 
 
Life Insurance Assumed And Ceded Business
The table below summarizes our consolidated life insurance earned premiums and contract holders' benefits incurred:
(Dollars in millions)
 
Years ended December 31,
 
 
2018
 
2017
 
2016
Direct earned premiums
 
$
320

 
$
300

 
$
290

Ceded earned premiums
 
(70
)
 
(68
)
 
(62
)
Earned premiums
 
$
250

 
$
232

 
$
228

 
 
 
 
 
 
 
Direct contract holders' benefits incurred
 
$
328

 
$
319

 
$
303

Ceded contract holders' benefits incurred
 
(61
)
 
(67
)
 
(57
)
Contract holders' benefits incurred
 
$
267

 
$
252

 
$
246