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Other Comprehensive Income
 9 Months Ended
Sep. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Other Comprehensive Income
Note 15
Other Comprehensive Income

Components of other comprehensive income (loss) on a pre-tax and after-tax basis
($ in millions)
 
Three months ended September 30,
 
2020
 
2019
 
Pre-tax
 
Tax
 
After-tax
 
Pre-tax
 
Tax
 
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets
 
$
414

 
$
(88
)
 
$
326

 
$
603

 
$
(127
)
 
$
476

Less: reclassification adjustment of realized capital gains and losses
 
233

 
(49
)
 
184

 
136

 
(29
)
 
107

Unrealized net capital gains and losses
 
181

 
(39
)
 
142

 
467

 
(98
)
 
369

Unrealized foreign currency translation adjustments
 
32

 
(7
)
 
25

 
(12
)
 
2

 
(10
)
Unamortized pension and other postretirement prior service credit (1)
 
48

 
(10
)
 
38

 
(15
)
 
3

 
(12
)
Other comprehensive income (loss)
 
$
261

 
$
(56
)
 
$
205

 
$
440

 
$
(93
)
 
$
347

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine months ended September 30,
 
 
2020
 
2019
 
 
Pre-tax
 
Tax
 
After-tax
 
Pre-tax
 
Tax
 
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets
 
$
1,777

 
$
(376
)
 
$
1,401

 
$
2,811

 
$
(593
)
 
$
2,218

Less: reclassification adjustment of realized capital gains and losses
 
689

 
(145
)
 
544

 
244

 
(51
)
 
193

Unrealized net capital gains and losses
 
1,088

 
(231
)
 
857

 
2,567

 
(542
)
 
2,025

Unrealized foreign currency translation adjustments
 
(6
)
 
1

 
(5
)
 
(1
)
 
—

 
(1
)
Unamortized pension and other postretirement prior service credit (1)
 
40

 
(9
)
 
31

 
(44
)
 
9

 
(35
)
Other comprehensive income (loss)
 
$
1,122

 
$
(239
)
 
$
883

 
$
2,522

 
$
(533
)
 
$
1,989


(1) 
Represents prior service credits reclassified out of other comprehensive income and amortized into operating costs and expenses.