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Accumulated Other Comprehensive (Loss) Income (Tables)
 12 Months Ended
Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Loss
The following table presents changes, net of tax, in each component of accumulated other comprehensive income (loss).
($ in millions)
Unrealized (losses) gains on investment securities (a)
 
Translation adjustments and net investment hedges (b)
 
Cash flow hedges (b)
 
Defined benefit pension plans
 
Accumulated other comprehensive income (loss)
Balance at January 1, 2017
$
(273
)
 
$
14

 
$
8

 
$
(90
)
 
$
(341
)
Net change
100

 
2

 
3

 
1

 
106

Balance at December 31, 2017
(173
)
 
16

 
11

 
(89
)
 
(235
)
Cumulative effect of changes in accounting principles, net of tax
 
 
 
 
 
 
 
 
 
Adoption of Accounting Standards Update 2016-01
27

 
—

 
—

 
—

 
27

Adoption of Accounting Standards Update 2018-02
(40
)
 
4

 
—

 
(6
)
 
(42
)
Balance at January 1, 2018
(186
)
 
20

 
11

 
(95
)
 
(250
)
Net change
(295
)
 
(2
)
 
8

 
—

 
(289
)
Balance at December 31, 2018
(481
)
 
18

 
19

 
(95
)
 
(539
)
Cumulative effect of changes in accounting principles, net of tax (c)
 
 
 
 
 
 
 
 
 
Adoption of Accounting Standards Update 2017-08
8

 
—

 
—

 
—

 
8

Balance at January 1, 2019
(473
)
 
18

 
19

 
(95
)
 
(531
)
Net change
681

 
1

 
(17
)
 
(11
)
 
654

Balance at December 31, 2019
$
208

 
$
19

 
$
2

 
$
(106
)
 
$
123


(a)
Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio.
(b)
For additional information on derivative instruments and hedging activities, refer to Note 21.
(c)
Refer to the section titled Recently Adopted Accounting Standards in Note 1 for additional information.
Reclassification out of Accumulated Other Comprehensive Income
The following tables present the before- and after-tax changes in each component of accumulated other comprehensive income (loss).
Year ended December 31, 2019 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized gains arising during the period
$
968

 
$
(227
)
 
$
741

Less: Net realized gains reclassified to income from continuing operations
78

(a)
(18
)
(b)
60

Net change
890

 
(209
)
 
681

Translation adjustments
 
 
 
 
 
Net unrealized gains arising during the period
7

 
(2
)
 
5

Net investment hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
(6
)
 
2

 
(4
)
Cash flow hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
(11
)
 
4

 
(7
)
Less: Net realized gains reclassified to income from continuing operations
12

(d)
(2
)
(b)
10

Net change
(23
)
 
6

 
(17
)
Defined benefit pension plans
 
 
 
 
 
Net unrealized losses arising during the period
(14
)
 
3

 
(11
)
Other comprehensive income
$
854

 
$
(200
)
 
$
654

(a)
Includes gains reclassified to other gain on investments, net in our Consolidated Statement of Income.
(b)
Includes amounts reclassified to income tax expense from continuing operations in our Consolidated Statement of Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 21.
(d)
Includes gains reclassified to interest on deposits and interest on long-term debt in our Consolidated Statement of Income.
Year ended December 31, 2018 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized losses arising during the period
$
(375
)
 
$
88

 
$
(287
)
Less: Net realized gains reclassified to income from continuing operations
11

(a)
(3
)
(b)
8

Net change
(386
)
 
91

 
(295
)
Translation adjustments
 
 
 
 
 
Net unrealized losses arising during the period
(14
)
 
3

 
(11
)
Net investment hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
12

 
(3
)
 
9

Cash flow hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
12

 
(2
)
 
10

Less: Net realized gains reclassified to income from continuing operations
2

(d)
—

 
2

Net change
10

 
(2
)
 
8

Defined benefit pension plans
 
 
 
 
 
Net unrealized gains arising during the period
1

 
(1
)
 
—

Other comprehensive loss
$
(377
)
 
$
88

 
$
(289
)
(a)
Includes gains reclassified to other gain on investments, net in our Consolidated Statement of Income.
(b)
Includes amounts reclassified to income tax expense from continuing operations in our Consolidated Statement of Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 21.
(d)
Includes gains reclassified to interest on deposits and interest on long-term debt in our Consolidated Statement of Income.
Year ended December 31, 2017 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized gains arising during the period
$
237

 
$
(45
)
 
$
192

Less: Net realized gains reclassified to income from continuing operations
105

(a)
(13
)
(b)
92

Net change
132

 
(32
)
 
100

Translation adjustments
 
 
 
 
 
Net unrealized gains arising during the period
12

 
(4
)
 
8

Net investment hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
(10
)
 
4

 
(6
)
Cash flow hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
5

 
(2
)
 
3

Defined benefit pension plans
 
 
 
 
 
Net unrealized gains arising during the period
1

 
—

 
1

Other comprehensive income
$
140

 
$
(34
)
 
$
106

(a)
Includes gains reclassified to other gain on investments, net in our Consolidated Statement of Income.
(b)
Includes amounts reclassified to income tax expense from continuing operations in our Consolidated Statement of Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 21.