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Accumulated Other Comprehensive (Loss) Income
 6 Months Ended
Jun. 30, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Comprehensive Income (Loss) Note Accumulated Other Comprehensive (Loss) Income
The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income.
 
Three months ended June 30,
($ 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 (loss) income
Balance at April 1, 2018
$
(524
)
 
$
19

 
$
25

 
$
(98
)
 
$
(578
)
Net change
(74
)
 
—

 
3

 
1

 
(70
)
Balance at June 30, 2018
$
(598
)
 
$
19

 
$
28

 
$
(97
)
 
$
(648
)
Balance at April 1, 2019
$
(158
)
 
$
18

 
$
11

 
$
(96
)
 
$
(225
)
Net change
291

 
1

 
17

 
—

 
309

Balance at June 30, 2019
$
133

 
$
19

 
$
28

 
$
(96
)
 
$
84

 
Six months ended June 30,
($ 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 (loss) income
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
(412
)
 
(1
)
 
17

 
(2
)
 
(398
)
Balance at June 30, 2018
$
(598
)
 
$
19

 
$
28

 
$
(97
)
 
$
(648
)
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
606

 
1

 
9

 
(1
)
 
615

Balance at June 30, 2019
$
133

 
$
19

 
$
28

 
$
(96
)
 
$
84


(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 17.
(c)
Refer to the section titled Recently Adopted Accounting Standards in Note 1 for additional information.
The following tables present the before- and after-tax changes in each component of accumulated other comprehensive income (loss).
Three months ended June 30, 2019 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized gains arising during the period
$
404

 
$
(95
)
 
$
309

Less: Net realized gains reclassified to income from continuing operations
24

(a)
(6
)
(b)
18

Net change
380

 
(89
)
 
291

Translation adjustments
 
 
 
 
 
Net unrealized gains arising during the period
4

 
(1
)
 
3

Net investment hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
(3
)
 
1

 
(2
)
Cash flow hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
26

 
(6
)
 
20

Less: Net realized gains reclassified to income from continuing operations
4

 
(1
)
 
3

Net change
22

 
(5
)
 
17

Other comprehensive income
$
403

 
$
(94
)
 
$
309

(a)
Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.
(b)
Includes amounts reclassified to income tax (benefit) expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 17.
Three months ended June 30, 2018 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized losses arising during the period
$
(95
)
 
$
22

 
$
(73
)
Less: Net realized gains reclassified to income from continuing operations
1

(a)
—

(b)
1

Net change
(96
)
 
22

 
(74
)
Translation adjustments
 
 
 
 
 
Net unrealized losses arising during the period
(3
)
 
1

 
(2
)
Net investment hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
3

 
(1
)
 
2

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 loss
$
(90
)
 
$
20

 
$
(70
)
(a)
Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.
(b)
Includes amounts reclassified to income tax (benefit) expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 17.
Six months ended June 30, 2019 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized gains arising during the period
$
825

 
$
(194
)
 
$
631

Less: Net realized gains reclassified to income from continuing operations
33

(a)
(8
)
(b)
25

Net change
792

 
(186
)
 
606

Translation adjustments
 
 
 
 
 
Net unrealized gains arising during the period
6

 
(2
)
 
4

Net investment hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
(5
)
 
2

 
(3
)
Cash flow hedges (c)
 
 
 
 
 
Net unrealized losses arising during the period
21

 
(5
)
 
16

Less: Net realized gains reclassified to income from continuing operations
9

 
(2
)
 
7

Net change
12

 
(3
)
 
9

Defined benefit pension plans
 
 
 
 
 
Net unrealized losses arising during the period
(1
)
 
—

 
(1
)
Other comprehensive income
$
804

 
$
(189
)
 
$
615

(a)
Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.
(b)
Includes amounts reclassified to income tax (benefit) expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 17.
Six months ended June 30, 2018 ($ in millions)
Before tax
 
Tax effect
 
After tax
Investment securities
 
 
 
 
 
Net unrealized losses arising during the period
$
(531
)
 
$
125

 
$
(406
)
Less: Net realized gains reclassified to income from continuing operations
7

(a)
(1
)
(b)
6

Net change
(538
)
 
126

 
(412
)
Translation adjustments
 
 
 
 
 
Net unrealized losses arising during the period
(8
)
 
2

 
(6
)
Net investment hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
7

 
(2
)
 
5

Cash flow hedges (c)
 
 
 
 
 
Net unrealized gains arising during the period
23

 
(6
)
 
17

Defined benefit pension plans
 
 
 
 
 
Net unrealized losses arising during the period
(2
)
 
—

 
(2
)
Other comprehensive loss
$
(518
)
 
$
120

 
$
(398
)
(a)
Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.
(b)
Includes amounts reclassified to income tax (benefit) expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.
(c)
For additional information on derivative instruments and hedging activities, refer to Note 17.