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Claim and Claim Adjustment Expense Reserves (Tables)
 6 Months Ended
Jun. 30, 2018
Net Incurred Claim and Claim Adjustment Expense [Line Items]  
Schedule of liability for unpaid claims and claims adjustment expense
The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves of the Life & Group segment.
For the six months ended June 30
 
 
 
(In millions)
2018
 
2017
Reserves, beginning of year:
 
 
 
Gross
$
22,004

 
$
22,343

Ceded
3,934

 
4,094

Net reserves, beginning of year
18,070

 
18,249

Net incurred claim and claim adjustment expenses:
 
 
 
Provision for insured events of current year
2,552

 
2,443

Decrease in provision for insured events of prior years
(112
)
 
(159
)
Amortization of discount
92

 
93

Total net incurred (1)
2,532

 
2,377

Net payments attributable to:
 
 
 
Current year events
(312
)
 
(266
)
Prior year events
(2,387
)
 
(2,331
)
Total net payments
(2,699
)
 
(2,597
)
Foreign currency translation adjustment and other
(70
)
 
70

Net reserves, end of period
17,833

 
18,099

Ceded reserves, end of period
4,157

 
4,080

Gross reserves, end of period
$
21,990

 
$
22,179


(1)
Total net incurred above does not agree to Insurance claims and policyholders' benefits as reflected on the Condensed Consolidated Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, uncollectible reinsurance and loss deductible receivables, and benefit expenses related to future policy benefits which are not reflected in the table above.
Net prior year development
The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Periods ended June 30
Three Months
 
Six Months
(In millions)
2018
 
2017
 
2018
 
2017
Pretax (favorable) unfavorable development:
 
 
 
 
 
 
 
Specialty
$
(44
)
 
$
(23
)
 
$
(74
)
 
$
(35
)
Commercial
(13
)
 
(34
)
 
(22
)
 
(77
)
International
(2
)
 
2

 
(2
)
 
—

Corporate & Other
—

 
—

 
—

 
—

Total pretax (favorable) unfavorable development
$
(59
)
 
$
(55
)
 
$
(98
)
 
$
(112
)
Specialty  
Net Incurred Claim and Claim Adjustment Expense [Line Items]  
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Specialty segment.
Periods ended June 30
Three Months
 
Six Months
(In millions)
2018
 
2017
 
2018
 
2017
Pretax (favorable) unfavorable development:
 
 
 
 
 
 
 
Medical Professional Liability
$
3

 
$
2

 
$
23

 
$
22

Other Professional Liability and Management Liability
(34
)
 
(37
)
 
(68
)
 
(69
)
Surety
(15
)
 
—

 
(30
)
 
—

Warranty
(6
)
 
6

 
(6
)
 
6

Other
8

 
6

 
7

 
6

Total pretax (favorable) unfavorable development
$
(44
)
 
$
(23
)
 
$
(74
)
 
$
(35
)
Commercial  
Net Incurred Claim and Claim Adjustment Expense [Line Items]  
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Commercial segment.
Periods ended June 30
Three Months
 
Six Months
(In millions)
2018
 
2017
 
2018
 
2017
Pretax (favorable) unfavorable development:
 
 
 
 
 
 
 
Commercial Auto
$
—

 
$
1

 
$
(1
)
 
$
(25
)
General Liability
26

 
1

 
18

 
(17
)
Workers' Compensation
(6
)
 
(47
)
 
(12
)
 
(47
)
Property and Other
(33
)
 
11

 
(27
)
 
12

Total pretax (favorable) unfavorable development
$
(13
)
 
$
(34
)
 
$
(22
)
 
$
(77
)
International  
Net Incurred Claim and Claim Adjustment Expense [Line Items]  
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the International segment.
Periods ended June 30
Three Months
 
Six Months
(In millions)
2018
 
2017
 
2018
 
2017
Pretax (favorable) unfavorable development:
 
 
 
 
 
 
 
Casualty
$
(6
)
 
$
1

 
$
(6
)
 
$
1

Property
12

 
(10
)
 
12

 
(11
)
Energy and Marine
(5
)
 
(3
)
 
(5
)
 
(3
)
Specialty
9

 
16

 
9

 
15

Healthcare and Technology
(12
)
 
(2
)
 
(12
)
 
(2
)
Total pretax (favorable) unfavorable development
$
(2
)
 
$
2

 
$
(2
)
 
$
—
CNAF Consolidated  
Net Incurred Claim and Claim Adjustment Expense [Line Items]  
Impact of loss portfolio transfer on the consolidated statement of operations
The following table presents the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations.
Periods ended June 30
Three Months
 
Six Months
(In millions)
2018
 
2017
 
2018
 
2017
Additional amounts ceded under LPT:
 
 
 
 
 
 
 
Net A&EP adverse development before consideration of LPT
$
—

 
$
—

 
$
113

 
$
60

Provision for uncollectible third-party reinsurance on A&EP
—

 
—

 
(16
)
 
—

Total additional amounts ceded under LPT
—

 
—

 
97

 
60

Retroactive reinsurance benefit recognized
(15
)
 
(3
)
 
(72
)
 
(43
)
Pretax impact of deferred retroactive reinsurance
$
(15
)
 
$
(3
)
 
$
25

 
$
17