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PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables)
 12 Months Ended
Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule Of Net Benefit Costs [Table Text Block]
The net periodic benefit cost/(credit) of defined benefit pension plans includes:
Dollars in Millions
 
2016
 
2015
 
2014
Service cost — benefits earned during the year
 
$
24

 
$
25

 
$
34

Interest cost on projected benefit obligation
 
192

 
242

 
305

Expected return on plan assets
 
(418
)
 
(405
)
 
(508
)
Amortization of prior service credits
 
(3
)
 
(3
)
 
(3
)
Amortization of net actuarial loss
 
84

 
91

 
110

Curtailments
 
—

 
(1
)
 
1

Settlements
 
91

 
161

 
866

Special termination benefits
 
1

 
—

 
14

Net periodic benefit cost/(credit)
 
$
(29
)
 
$
110

 
$
819
Schedule Of Defined Benefit Obligations And Assets [Table Text Block]
Changes in defined benefit pension plan obligations, assets, funded status and amounts recognized in the consolidated balance sheets were as follows:
Dollars in Millions
 
2016
 
2015
Benefit obligations at beginning of year
 
$
6,418

 
$
7,068

Service cost—benefits earned during the year
 
24

 
25

Interest cost
 
192

 
242

Settlements
 
(173
)
 
(336
)
Actuarial (gains)/losses
 
253

 
(321
)
Benefits paid
 
(109
)
 
(105
)
Foreign currency and other
 
(165
)
 
(155
)
Benefit obligations at end of year
 
$
6,440

 
$
6,418

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

 
$
6,148

Actual return on plan assets
 
513

 
(5
)
Employer contributions
 
81

 
118

Settlements
 
(173
)
 
(336
)
Benefits paid
 
(109
)
 
(105
)
Foreign currency and other
 
(168
)
 
(133
)
Fair value of plan assets at end of year
 
$
5,831

 
$
5,687

 
 
 
 
 
Funded status
 
$
(609
)
 
$
(731
)
 
 
 
 
 
Assets/(Liabilities) recognized:
 
 
 
 
Other assets
 
$
26

 
$
71

Accrued liabilities
 
(35
)
 
(37
)
Pension and other liabilities
 
(600
)
 
(765
)
Funded status
 
$
(609
)
 
$
(731
)
 
 
 
 
 
Recognized in accumulated other comprehensive loss:
 
 
 
 
Net actuarial losses
 
$
3,123

 
$
3,140

Prior service credit
 
(39
)
 
(39
)
Total
 
$
3,084

 
$
3,101
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
 
2016
 
2015
Pension plans with projected benefit obligations in excess of plan assets:
 
 
 
 
Projected benefit obligation
 
$
6,195

 
$
5,310

Fair value of plan assets
 
5,559

 
4,508

Pension plans with accumulated benefit obligations in excess of plan assets:
 
 
 
 
Accumulated benefit obligation
 
$
5,978

 
$
5,156

Fair value of plan assets
 
5,380

 
4,386
Schedule Of Defined Benefit Actuarial Assumptions Benefit Obligations [Table Text Block]
Weighted-average assumptions used to determine defined benefit pension plan obligations at December 31 were as follows:
 
 
2016
 
2015
Discount rate
 
3.5
%
 
3.8
%
Rate of compensation increase
 
0.5
%
 
0.5
%
Schedule Of Defined Benefit Actuarial Assumptions Net Periodic Benefit Cost [Table Text Block]
Weighted-average actuarial assumptions used to determine defined benefit pension plan net periodic benefit (credit)/cost for the years ended December 31 were as follows:
 
 
2016
 
2015
 
2014
Discount rate
 
3.8
%
 
3.6
%
 
4.2
%
Expected long-term return on plan assets
 
7.2
%
 
7.2
%
 
7.6
%
Rate of compensation increase
 
0.5
%
 
0.8
%
 
2.3
%
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:
 
 
2016
 
2015
 
2014
10 years
 
6.1
%
 
6.7
%
 
7.9
%
15 years
 
7.1
%
 
6.0
%
 
6.4
%
20 years
 
7.7
%
 
8.1
%
 
9.3
%
Schedule Of Allocation Of Plan Assets [Table Text Block]
The fair value of pension and postretirement plan assets by asset category at December 31, 2016 and 2015 was as follows:
 
 
December 31, 2016
 
December 31, 2015
Dollars in Millions
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Plan Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity securities
 
$
833

 
$
—

 
$
—

 
$
833

 
$
785

 
$
—

 
$
—

 
$
785

Equity funds
 
138

 
1,230

 
—

 
1,368

 
452

 
748

 
—

 
1,200

Fixed income funds
 
—

 
804

 
—

 
804

 
249

 
724

 
—

 
973

Corporate debt securities
 
—

 
1,405

 
—

 
1,405

 
—

 
1,382

 
—

 
1,382

U.S. Treasury and agency securities
 
—

 
536

 
—

 
536

 
—

 
517

 
—

 
517

Short-term investment funds
 
—

 
90

 
—

 
90

 
—

 
103

 
—

 
103

Insurance contracts
 
—

 
—

 
112

 
112

 
—

 
—

 
115

 
115

Cash and cash equivalents
 
81

 
—

 
—

 
81

 
106

 
—

 
—

 
106

Other
 
—

 
93

 
—

 
93

 
4

 
14

 
—

 
18

Plan assets subject to leveling
 
$
1,052

 
$
4,158

 
$
112

 
$
5,322

 
$
1,596

 
$
3,488

 
$
115

 
$
5,199

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Plan assets measured at NAV as a practical expedient
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Equity funds
 
 
 
 
 
 
 
$
476

 
 
 
 
 
 
 
$
495

Venture capital and limited partnerships
 
 
 
 
 
 
 
198

 
 
 
 
 
 
 
249

Other
 
 
 
 
 
 
 
166

 
 
 
 
 
 
 
72

Total plan assets measured at NAV as a practical expedient
 
 
 
 
 
840

 
 
 
 
 
 
 
816

Net plan assets
 
 
 
 
 
 
 
$
6,162

 
 
 
 
 
 
 
$
6,015
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
 
Insurance contracts
Fair value at January 1, 2015
 
$
119

Purchases, sales and settlements, net
 
7

Realized losses
 
(11
)
Fair value at December 31, 2015
 
115

Purchases, sales and settlements, net
 
(3
)
Fair value at December 31, 2016
 
$
112