Shareowners' Equity and Noncontrolling Interest (Tables)
 9 Months Ended
Sep. 30, 2016
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders Equity [Table Text Block]
A summary of the changes in shareowners' equity and noncontrolling interest comprising total equity for the quarters and nine months ended September 30, 2016 and 2015 is provided below:
 
Quarter Ended September 30,
 
2016
 
2015
(Dollars in millions)
Share-owners'
Equity
 
Non-controlling Interest
 
Total
Equity
 
Share-owners'
Equity
 
Non-controlling Interest
 
Total
Equity
Equity, beginning of period
$
29,090

 
$
1,558

 
$
30,648

 
$
30,377

 
$
1,561

 
$
31,938

Comprehensive income for the period:
 
 
 
 
 
 
 
 
 
 
 
Net income
1,480

 
91

 
1,571

 
1,362

 
99

 
1,461

Total other comprehensive (loss) income
(245
)
 
5

 
(240
)
 
(811
)
 
(23
)
 
(834
)
Total comprehensive income for the period
1,235

 
96

 
1,331

 
551

 
76

 
627

Common Stock issued - equity unit remarketing
—

 

 
—

 
1,100

 

 
1,100

Common Stock issued under employee plans
54

 

 
54

 
65

 

 
65

Common Stock repurchased
(649
)
 

 
(649
)
 
(1,000
)
 

 
(1,000
)
Dividends on Common Stock
(526
)
 

 
(526
)
 
(547
)
 

 
(547
)
Dividends on ESOP Common Stock
(19
)
 

 
(19
)
 
(19
)
 

 
(19
)
Dividends attributable to noncontrolling interest


 
(129
)
 
(129
)
 


 
(113
)
 
(113
)
Sale of subsidiary shares from noncontrolling interest
2

 
22

 
24

 
1

 
—

 
1

Acquisition of noncontrolling interest

 
29

 
29

 

 
—

 
—

Other
—

 
1

 
1

 
(3
)
 
2

 
(1
)
Equity, end of period
$
29,187

 
$
1,577

 
$
30,764

 
$
30,525

 
$
1,526

 
$
32,051


 
Nine Months Ended September 30,
 
2016
 
2015
(Dollars in millions)
Share-owners'
Equity
 
Non-controlling
Interest
 
Total
Equity
 
Share-owners'
Equity
 
Non-controlling
Interest
 
Total
Equity
Equity, beginning of period
$
27,358

 
$
1,486

 
$
28,844

 
$
31,213

 
$
1,351

 
$
32,564

Comprehensive income for the period:
 
 
 
 
 
 
 
 
 
 
 
Net income
4,042

 
271

 
4,313

 
4,330

 
281

 
4,611

Total other comprehensive (loss) income
(110
)
 
16

 
(94
)
 
(727
)
 
(63
)
 
(790
)
Total comprehensive income for the period
3,932

 
287

 
4,219

 
3,603

 
218

 
3,821

Common Stock issued - equity unit remarketing
—

 

 
—

 
1,100

 

 
1,100

Common Stock issued under employee plans
200

 

 
200

 
302

 

 
302

Common Stock repurchased
(685
)
 


 
(685
)
 
(4,000
)
 

 
(4,000
)
Dividends on Common Stock
(1,561
)
 


 
(1,561
)
 
(1,643
)
 

 
(1,643
)
Dividends on ESOP Common Stock
(56
)
 

 
(56
)
 
(56
)
 

 
(56
)
Dividends attributable to noncontrolling interest


 
(270
)
 
(270
)
 

 
(229
)
 
(229
)
(Purchase) sale of subsidiary shares from noncontrolling interest
(4
)
 
21

 
17

 
12

 
10

 
22

Acquisition of noncontrolling interest

 
63

 
63

 

 
173

 
173

Disposition of noncontrolling interest

 
—

 
—

 

 
(3
)
 
(3
)
Other
3

 
(10
)
 
(7
)
 
(6
)
 
6

 
—

Equity, end of period
$
29,187

 
$
1,577

 
$
30,764

 
$
30,525

 
$
1,526

 
$
32,051
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
A summary of the changes in each component of accumulated other comprehensive (loss) income, net of tax for the quarters and nine months ended September 30, 2016 and 2015 is provided below:
(Dollars in millions)
Foreign
Currency
Translation
 
Defined
Benefit
Pension and
Post-
retirement
Plans
 
Unrealized Gains
(Losses) on
Available-for-Sale
Securities
 
Unrealized
Hedging
(Losses)
Gains
 
Accumulated
Other
Comprehensive
(Loss) Income
Quarter Ended September 30, 2016
 
 
 
 
 
 
 
 
 
Balance at June 30, 2016
$
(2,685
)
 
$
(4,999
)
 
$
317

 
$
(117
)
 
$
(7,484
)
Other comprehensive (loss) income before
reclassifications, net
(364
)
 
4

 
30

 
(5
)
 
(335
)
Amounts reclassified, pre-tax
(1
)
 
127

 
(20
)
 
32

 
138

Tax (benefit) expense reclassified
—

 
(47
)
 
8

 
(9
)
 
(48
)
Balance at September 30, 2016
$
(3,050
)
 
$
(4,915
)
 
$
335

 
$
(99
)
 
$
(7,729
)
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2016
 
 
 
 
 
 
 
 
 
Balance at December 31, 2015
$
(2,438
)
 
$
(5,135
)
 
$
293

 
$
(339
)
 
$
(7,619
)
Other comprehensive (loss) income before reclassifications, net
(612
)
 
(21
)
 
87

 
138

 
(408
)
Amounts reclassified, pre-tax
—

 
381

 
(72
)
 
139

 
448

Tax (benefit) expense reclassified
—

 
(140
)
 
27

 
(37
)
 
(150
)
Balance at September 30, 2016
$
(3,050
)
 
$
(4,915
)
 
$
335

 
$
(99
)
 
$
(7,729
)

(Dollars in millions)
Foreign
Currency
Translation
 
Defined
Benefit
Pension and
Post-
retirement
Plans
 
Unrealized Gains
(Losses) on
Available-for-Sale
Securities
 
Unrealized
Hedging
(Losses)
Gains
 
Accumulated
Other
Comprehensive
(Loss) Income
Quarter Ended September 30, 2015
 
 
 
 
 
 
 
 
 
Balance at June 30, 2015
$
(1,278
)
 
$
(5,405
)
 
$
330

 
$
(224
)
 
$
(6,577
)
Other comprehensive income (loss) before reclassifications, net
(913
)
 
73

 
(48
)
 
(111
)
 
(999
)
Amounts reclassified, pre-tax
—

 
216

 
(2
)
 
64

 
278

Tax (benefit) expense reclassified
—

 
(81
)
 
7

 
(16
)
 
(90
)
Balance at September 30, 2015
$
(2,191
)
 
$
(5,197
)
 
$
287

 
$
(287
)
 
$
(7,388
)
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2015
 
 
 
 
 
 
 
 
 
Balance at December 31, 2014
$
(1,051
)
 
$
(5,709
)
 
$
308

 
$
(209
)
 
$
(6,661
)
Other comprehensive (loss) income before reclassifications, net
(1,139
)
 
104

 
10

 
(194
)
 
(1,219
)
Amounts reclassified, pre-tax
(1
)
 
651

 
(56
)
 
164

 
758

Tax (benefit) expense reclassified
—

 
(243
)
 
25

 
(48
)
 
(266
)
Balance at September 30, 2015
$
(2,191
)
 
$
(5,197
)
 
$
287

 
$
(287
)
 
$
(7,388
)