Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Benefit or (Income) Cost Related to Pension and Postretirement Health Care and Life Insurance

The following table summarizes the components of net periodic benefit cost (income) related to our pension and postretirement health care and life insurance plans:

	(dollars in millions)
	Pension						Health Care and Life
Three Months Ended September 30,	2018			2017			2018			2017
Service cost - Cost of services	$	57		$	55		$	26		$	29
Service cost - Selling, general and administrative expense	13			15			6			8
Service cost	$	70		$	70		$	32		$	37
Amortization of prior service cost (credit)	$	13		$	10		$	(244	)	$	(235	)
Expected return on plan assets	(321		)	(315		)	(11		)	(13		)
Interest cost	176			171			153			164
Remeasurement gain, net	(454		)	—			—			—
Other components	$	(586	)	$	(134	)	$	(102	)	$	(84	)
Total	$	(516	)	$	(64	)	$	(70	)	$	(47	)

	(dollars in millions)
	Pension						Health Care and Life
Nine Months Ended September 30,	2018			2017			2018			2017
Service cost - Cost of services	$	174		$	165		$	78		$	87
Service cost - Selling, general and administrative expense	41			45			18			24
Service cost	$	215		$	210		$	96		$	111
Amortization of prior service cost (credit)	$	33		$	29		$	(732	)	$	(705	)
Expected return on plan assets	(979		)	(947		)	(33		)	(39		)
Interest cost	508			513			460			494
Remeasurement gain, net	(454		)	—			—			—
Other components	$	(892	)	$	(405	)	$	(305	)	$	(250	)
Total	$	(677	)	$	(195	)	$	(209	)	$	(139	)