EMPLOYEE BENEFIT PLANS

6 Months Ended

Jun. 30, 2020

Retirement Benefits [Abstract]

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

Net periodic benefit costs for qualified defined-benefit plans include the following (in millions): 

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Service cost	$	13	$	10	$	26	$	21
Pension expense included in Wages and benefits	13		10		26		21
Interest cost	19		22		38		44
Expected return on assets	(27)		(23)		(55)		(47)
Recognized actuarial loss	8		9		17		18
Pension expense included in Nonoperating Income (Expense)	$	—	$	8	$	—	$	15