Employee Benefit Plans (Tables)

6 Months Ended

Jun. 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 June 30,				Six Months Ended June 30,
(Dollars in millions)	2016		2015		2016		2015
Defined benefit plans	$	32	$	25	$	107	$	70
Defined contribution plans	78		86		156		182

There were no contributions to our domestic defined benefit pension plans in the quarters and six months ended June 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 June 30,						Other Postretirement Benefits Quarter Ended June 30,
(Dollars in millions)	2016			2015			2016			2015
Service cost	$	97		$	124		$	1		$	1
Interest cost	304			350			8			8
Expected return on plan assets	(559		)	(565		)	—			—
Amortization of prior service credit	(7		)	(2		)	—			—
Recognized actuarial net loss (gain)	136			221			(1		)	(1		)
Net settlement and curtailment loss	3			3			—			—
Total net periodic benefit (income) cost	$	(26	)	$	131		$	8		$	8

	Pension Benefits Six Months Ended June 30,						Other Postretirement Benefits Six Months Ended June 30,
(Dollars in millions)	2016			2015			2016			2015
Service cost	$	191		$	249		$	2		$	2
Interest cost	606			701			16			16
Expected return on plan assets	(1,115		)	(1,134		)	—			—
Amortization of prior service credit	(15		)	(5		)	—			—
Recognized actuarial net loss (gain)	271			442			(2		)	(2		)
Net settlement and curtailment loss	15			9			—			—
Total net periodic benefit (income) cost	$	(47	)	$	262		$	16		$	16