Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Contributions to our plans were as follows:

	Quarter Ended September 30,				Nine Months Ended September 30,
(Dollars in millions)	2016		2015		2016		2015
Defined benefit plans	$	18	$	23	$	125	$	93
Defined contribution plans	79		82		235		264

There were no contributions to our domestic defined benefit pension plans in the quarters and nine months ended September 30, 2016 and 2015. 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)	2016			2015			2016			2015
Service cost	$	96		$	124		$	1		$	1
Interest cost	302			350			9			8
Expected return on plan assets	(554		)	(566		)	—			—
Amortization of prior service credit	(7		)	(3		)	—			—
Recognized actuarial net loss (gain)	135			220			(1		)	(1		)
Net settlement and curtailment loss	3			128			—			—
Total net periodic benefit (income) cost	$	(25	)	$	253		$	9		$	8

	Pension Benefits Nine Months Ended September 30,						Other Postretirement Benefits Nine Months Ended September 30,
(Dollars in millions)	2016			2015			2016			2015
Service cost	$	287		$	373		$	3		$	3
Interest cost	908			1,051			25			24
Expected return on plan assets	(1,669		)	(1,700		)	—			—
Amortization of prior service credit	(22		)	(8		)	—			—
Recognized actuarial net loss (gain)	406			662			(3		)	(3		)
Net settlement and curtailment loss	18			137			—			—
Total net periodic benefit (income) cost	$	(72	)	$	515		$	25		$	24