PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

The net periodic benefit cost/(credit) of defined benefit pension plans includes:

Dollars in Millions	2017			2016			2015
Service cost — benefits earned during the year	$	25		$	24		$	25
Interest cost on projected benefit obligation	188			192			242
Expected return on plan assets	(411		)	(418		)	(405		)
Amortization of prior service credits	(4		)	(3		)	(3		)
Amortization of net actuarial loss	82			84			91
Curtailments	(8		)	—			(1		)
Settlements	167			91			161
Special termination benefits	3			1			—
Net periodic benefit cost/(credit)	$	42		$	(29	)	$	110

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	2017			2016
Benefit obligations at beginning of year	$	6,440		$	6,418
Service cost—benefits earned during the year	25			24
Interest cost	188			192
Settlements	(330		)	(173		)
Actuarial (gains)/losses	368			253
Benefits paid	(121		)	(109		)
Foreign currency and other	179			(165		)
Benefit obligations at end of year	$	6,749		$	6,440
Fair value of plan assets at beginning of year	$	5,831		$	5,687
Actual return on plan assets	804			513
Employer contributions	396			81
Settlements	(330		)	(173		)
Benefits paid	(121		)	(109		)
Foreign currency and other	169			(168		)
Fair value of plan assets at end of year	$	6,749		$	5,831
Funded status	$	—		$	(609	)
Assets/(Liabilities) recognized:
Other assets	$	487		$	26
Accrued liabilities	(31		)	(35		)
Pension and other liabilities	(456		)	(600		)
Funded status	$	—		$	(609	)
Recognized in accumulated other comprehensive loss:
Net actuarial losses	$	2,849		$	3,123
Prior service credit	(36		)	(39		)
Total	$	2,813		$	3,084

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	2017		2016
Pension plans with projected benefit obligations in excess of plan assets:
Projected benefit obligation	$	1,166	$	6,195
Fair value of plan assets	678		5,559
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	$	1,008	$	5,978
Fair value of plan assets	550		5,380

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:

	2017		2016
Discount rate	3.1	%	3.5	%
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:

	2017		2016		2015
Discount rate	3.5	%	3.8	%	3.6	%
Expected long-term return on plan assets	7.0	%	7.2	%	7.2	%
Rate of compensation increase	0.5	%	0.5	%	0.8	%

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:

	2017		2016		2015
10 years	6.8	%	6.1	%	6.7	%
15 years	9.3	%	7.1	%	6.0	%
20 years	7.5	%	7.7	%	8.1	%

Schedule Of Allocation Of Plan Assets [Table Text Block]

The fair value of pension and postretirement plan assets by asset category at December 31, 2017 and 2016 was as follows:

	December 31, 2017								December 31, 2016
Dollars in Millions	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Plan Assets
Equity securities	$	799	$	—	$	—	$	799	$	833	$	—	$	—	$	833
Equity funds	160		1,358		—		1,518		138		1,230		—		1,368
Fixed income funds	—		724		—		724		—		804		—		804
Corporate debt securities	—		1,919		—		1,919		—		1,405		—		1,405
U.S. Treasury and agency securities	—		729		—		729		—		536		—		536
Short-term investment funds	—		135		—		135		—		90		—		90
Insurance contracts	—		—		138		138		—		—		112		112
Cash and cash equivalents	214		—		—		214		81		—		—		81
Other	—		92		13		105		—		93		—		93
Plan assets subject to leveling	$	1,173	$	4,957	$	151	$	6,281	$	1,052	$	4,158	$	112	$	5,322
Plan assets measured at NAV as a practical expedient
Equity funds							$	488							$	476
Venture capital and limited partnerships							154								198
Other							191								166
Total plan assets measured at NAV as a practical expedient							833								840
Net plan assets							$	7,114							$	6,162