Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

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

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The following table illustrates the components of net periodic benefit cost for our defined pension and other postretirement benefit plans:

	Pension Benefits Quarter Ended September 30,						Other Postretirement Benefits Quarter Ended September 30,
(Dollars in millions)	2015			2014			2015			2014
Service cost	$	124		$	122		$	1		$	1
Interest cost	350			381			8			10
Expected return on plan assets	(566		)	(555		)	—			—
Amortization	(3		)	(3		)	—			—
Recognized actuarial net loss (gain)	220			108			(1		)	(1		)
Net settlement and curtailment loss	128			2			—			—
Total net periodic benefit cost	$	253		$	55		$	8		$	10

	Pension Benefits Nine Months Ended September 30,						Other Postretirement Benefits Nine Months Ended September 30,
(Dollars in millions)	2015			2014			2015			2014
Service cost	$	373		$	366		$	3		$	3
Interest cost	1,051			1,141			24			30
Expected return on plan assets	(1,700		)	(1,663		)	—			—
Amortization	(8		)	(7		)	—			—
Recognized actuarial net loss (gain)	662			322			(3		)	(3		)
Net settlement and curtailment loss	137			8			—			—
Total net periodic benefit cost	$	515		$	167		$	24		$	30

Contributions to our plans were as follows:

	Quarter Ended September 30,				Nine Months Ended September 30,
(Dollars in millions)	2015		2014		2015		2014
Defined benefit plans	$	23	$	60	$	93	$	204
Defined contribution plans	82		79		264		249