Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2015

Defined Pension, Defined Contribution and Other Postretirement Benefit Plans [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Quarter Ended March 31,
(Dollars in millions)	2015		2014
Defined benefit plans	$	45	$	84
Defined contribution plans	$	96	$	90

	Pension Benefits Quarter Ended March 31,						Other Postretirement Benefits Quarter Ended March 31,
(Dollars in millions)	2015			2014			2015			2014
Service cost	$	125		$	122		$	1		$	1
Interest cost	351			380			8			10
Expected return on plan assets	(569		)	(554		)	—			—
Amortization	(3		)	(2		)	—			—
Recognized actuarial net loss (gain)	221			107			(1		)	(1		)
Net settlement and curtailment loss	6			—			—			—
Total net periodic benefit cost	$	131		$	53		$	8		$	10