Post-Employment Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Post-Employment Benefits

Schedule of components of the net periodic benefit cost for the entity's major defined benefit plans and post-employment medical and dental benefit plans

	Defined Benefit Plans								Medical and Dental Plans
	Three Months				Nine Months				Three Months				Nine Months
	Ended September 30				Ended September 30				Ended September 30				Ended September 30
(in millions)	2020		2019		2020		2019		2020		2019		2020		2019
Service cost — benefits earned during the period	$	85	$	63	$	251	$	188	$	12	$	5	$	35	$	17
Interest cost on projected benefit obligations		75		84		224		253		11		13		32		39
Expected return on plan assets		(193)		(177)		(576)		(533)		(7)		(6)		(21)		(20)
Net amortization of:
Actuarial loss, net		64		33		191		99		5		6		15		17
Prior service cost (credit)		—		—		1		1		(7)		(8)		(21)		(24)
Net cost - continuing operations	$	31	$	3	$	91	$	8	$	14	$	10	$	40	$	29