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PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables)
 12 Months Ended
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Schedule Of Net Benefit Costs [Table Text Block]
The net periodic benefit cost/(credit) of defined benefit pension and postretirement benefit plans includes:
 
 
Pension Benefits
 
Other Benefits
Dollars in Millions
 
2015
 
2014
 
2013
 
2015
 
2014
 
2013
Service cost — benefits earned during the year
 
$
25

 
$
34

 
$
38

 
$
4

 
$
4

 
$
8

Interest cost on projected benefit obligation
 
242

 
305

 
302

 
13

 
14

 
13

Expected return on plan assets
 
(405
)
 
(508
)
 
(519
)
 
(27
)
 
(27
)
 
(26
)
Amortization of prior service credits
 
(3
)
 
(3
)
 
(4
)
 
(6
)
 
(1
)
 
(2
)
Amortization of net actuarial (gain)/loss
 
91

 
110

 
134

 
3

 
(2
)
 
1

Curtailments
 
(1
)
 
1

 
—

 
—

 
(4
)
 
—

Settlements
 
161

 
866

 
165

 
—

 
—

 
—

Special termination benefits
 
—

 
14

 
—

 
—

 
—

 
—

Net periodic benefit cost/(credit)
 
$
110

 
$
819

 
$
116

 
$
(13
)
 
$
(16
)
 
$
(6
)
Schedule Of Defined Benefit Obligations And Assets [Table Text Block]
Changes in defined benefit and postretirement benefit plan obligations, assets, funded status and amounts recognized in the consolidated balance sheets were as follows:
 
 
Pension Benefits
 
Other Benefits
Dollars in Millions
 
2015
 
2014
 
2015
 
2014
Benefit obligations at beginning of year
 
$
7,068

 
$
7,233

 
$
402

 
$
404

Service cost—benefits earned during the year
 
25

 
34

 
4

 
4

Interest cost
 
242

 
305

 
13

 
14

Plan participants’ contributions
 
2

 
2

 
24

 
22

Curtailments
 
—

 
(27
)
 
—

 
(3
)
Settlements
 
(336
)
 
(1,774
)
 
—

 
—

Plan amendments
 
(3
)
 
(2
)
 
—

 
(7
)
Actuarial (gains)/losses
 
(321
)
 
1,673

 
(26
)
 
28

Retiree Drug Subsidy
 
—

 
—

 
5

 
6

Benefits paid
 
(105
)
 
(216
)
 
(62
)
 
(62
)
Exchange rate gains
 
(154
)
 
(160
)
 
(5
)
 
(4
)
Benefit obligations at end of year
 
$
6,418

 
$
7,068

 
$
355

 
$
402

 
 
 
 
 
 
 
 
 
Fair value of plan assets at beginning of year
 
$
6,148

 
$
7,406

 
$
357

 
$
347

Actual return on plan assets
 
(5
)
 
750

 
(4
)
 
36

Employer contributions
 
118

 
124

 
8

 
8

Plan participants’ contributions
 
2

 
2

 
24

 
22

Settlements
 
(336
)
 
(1,774
)
 
—

 
—

Retiree Drug Subsidy
 
—

 
—

 
5

 
6

Benefits paid
 
(105
)
 
(216
)
 
(62
)
 
(62
)
Exchange rate losses
 
(135
)
 
(144
)
 
—

 
—

Fair value of plan assets at end of year
 
$
5,687

 
$
6,148

 
$
328

 
$
357

 
 
 
 
 
 
 
 
 
Funded status
 
$
(731
)
 
$
(920
)
 
$
(27
)
 
$
(45
)
 
 
 
 
 
 
 
 
 
Assets/(Liabilities) recognized:
 
 
 
 
 
 
 
 
Other assets
 
$
71

 
$
40

 
$
96

 
$
91

Accrued expenses
 
(37
)
 
(36
)
 
(10
)
 
(11
)
Pension and other postretirement liabilities
 
(765
)
 
(924
)
 
(113
)
 
(125
)
Funded status
 
$
(731
)
 
$
(920
)
 
$
(27
)
 
$
(45
)
 
 
 
 
 
 
 
 
 
Recognized in accumulated other comprehensive loss:
 
 
 
 
 
 
 
 
Net actuarial (gains)/losses
 
$
3,140

 
$
3,304

 
$
(22
)
 
$
(24
)
Prior service credit
 
(39
)
 
(40
)
 
(4
)
 
(9
)
Total
 
$
3,101

 
$
3,264

 
$
(26
)
 
$
(33
)
Schedule Of Accumulated And Projected Benefit Obligation In Excess Of Fair Value Of Plan Assets [Table Text Block]
Additional information related to pension plans was as follows:
Dollars in Millions
 
2015
 
2014
Pension plans with projected benefit obligations in excess of plan assets:
 
 
 
 
Projected benefit obligation
 
$
5,310

 
$
5,877

Fair value of plan assets
 
4,508

 
4,917

Pension plans with accumulated benefit obligations in excess of plan assets:
 
 
 
 
Accumulated benefit obligation
 
$
5,156

 
$
5,731

Fair value of plan assets
 
4,386

 
4,823
Schedule Of Defined Benefit Actuarial Assumptions Benefit Obligations [Table Text Block]
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:
 
 
Pension Benefits
 
Other Benefits
 
 
2015
 
2014
 
2015
 
2014
Discount rate
 
3.8
%
 
3.6
%
 
3.6
%
 
3.4
%
Rate of compensation increase
 
0.5
%
 
0.8
%
 
2.0
%
 
2.0
%
Schedule Of Defined Benefit Actuarial Assumptions Net Periodic Benefit Cost [Table Text Block]
Weighted-average actuarial assumptions used to determine net periodic benefit (credit)/cost for the years ended December 31 were as follows:
 
 
Pension Benefits
 
Other Benefits
 
 
2015
 
2014
 
2013
 
2015
 
2014
 
2013
Discount rate
 
3.6
%
 
4.2
%
 
4.1
%
 
3.4
%
 
3.7
%
 
3.0
%
Expected long-term return on plan assets
 
7.2
%
 
7.6
%
 
8.0
%
 
7.8
%
 
8.3
%
 
8.8
%
Rate of compensation increase
 
0.8
%
 
2.3
%
 
2.3
%
 
2.0
%
 
2.1
%
 
2.1
%
Schedule Of Defined Benefit Historical Long Term Actual Returns [Table Text Block]
Historical long-term actual annualized returns for U.S. pension plans were as follows:
 
 
2015
 
2014
 
2013
10 years
 
6.7
%
 
7.9
%
 
8.0
%
15 years
 
6.0
%
 
6.4
%
 
6.8
%
20 years
 
8.1
%
 
9.3
%
 
8.8
%
Schedule Of Health Care Cost Trend Rates [Table Text Block]
Assumed healthcare cost trend rates at December 31 were as follows:
 
 
2015
 
2014
 
2013
Healthcare cost trend rate assumed for next year
 
5.5
%
 
6.0
%
 
6.4
%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
 
4.5
%
 
4.5
%
 
4.5
%
Year that the rate reaches the ultimate trend rate
 
2018

 
2018

 
2019
Schedule Of Effect Of One Percentage Point Change In Assumed Health Care Cost Trend Rates [Table Text Block]
A one-percentage-point change in assumed healthcare cost trend rates would not have a material impact on the cost or benefit obligation.
Schedule Of Allocation Of Plan Assets [Table Text Block]
The fair value of pension and postretirement plan assets by asset category at December 31, 2015 and 2014 was as follows:
 
 
December 31, 2015
 
December 31, 2014
Dollars in Millions
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Equity Securities
 
$
785

 
$
—

 
$
—

 
$
785

 
$
1,115

 
$
—

 
$
—

 
$
1,115

Equity Funds
 
521

 
1,174

 
—

 
1,695

 
446

 
1,113

 
—

 
1,559

Fixed Income Funds
 
249

 
724

 
—

 
973

 
340

 
777

 
—

 
1,117

Corporate Debt Securities
 
—

 
1,382

 
—

 
1,382

 
—

 
1,481

 
—

 
1,481

Venture Capital and Limited Partnerships
 
—

 
—

 
249

 
249

 
—

 
—

 
327

 
327

U.S. Treasury and Agency Securities
 
—

 
517

 
—

 
517

 
—

 
557

 
—

 
557

Short-Term Investment Funds
 
—

 
103

 
—

 
103

 
—

 
63

 
—

 
63

Insurance Contracts
 
—

 
—

 
115

 
115

 
—

 
—

 
119

 
119

Event Driven Hedge Funds
 
—

 
72

 
—

 
72

 
—

 
71

 
—

 
71

Cash and Cash Equivalents
 
106

 
—

 
—

 
106

 
76

 
—

 
—

 
76

Other
 
4

 
14

 
—

 
18

 
4

 
16

 
—

 
20

Total plan assets at fair value
 
$
1,665

 
$
3,986

 
$
364

 
$
6,015

 
$
1,981

 
$
4,078

 
$
446

 
$
6,505
Schedule of Level Three Defined Benefit Plan Assets Roll Forward [Table Text Block]
The following summarizes the activity for financial assets utilizing Level 3 fair value measurements:
Dollars in Millions
 
Venture Capital
and Limited
Partnerships
 
Insurance
Contracts
 
Total
Fair value at January 1, 2014
 
$
369

 
$
142

 
$
511

Purchases, sales and settlements, net
 
(88
)
 
(15
)
 
(103
)
Realized gains/(losses)
 
61

 
(15
)
 
46

Unrealized gains/(losses)
 
(15
)
 
7

 
(8
)
Fair value at December 31, 2014
 
327

 
119

 
446

Purchases, sales and settlements, net
 
(92
)
 
7

 
(85
)
Realized gains/(losses)
 
41

 
(11
)
 
30

Unrealized losses
 
(27
)
 
—

 
(27
)
Fair value at December 31, 2015
 
$
249

 
$
115

 
$
364