Retirement Plans (Tables)

9 Months Ended

Feb. 29, 2020

Retirement Plan Tables [Abstract]

Schedule of Retirement Plan Costs

Our retirement plans costs for the periods ended February 29, 2020 and February 28, 2019 were as follows (in millions):

	Three Months Ended				Nine Months Ended
	2020		2019		2020		2019
Defined benefit pension plans, net	$	38	$	28	$	112	$	85
Defined contribution plans		147		138		425		415
Postretirement healthcare plans		21		19		64		56
	$	206	$	185	$	601	$	556

Schedule of Net Periodic Benefit Cost

Net periodic benefit cost of the pension and postretirement healthcare plans for the periods ended February 29, 2020 and February 28, 2019 included the following components (in millions):

	Three Months Ended
	U.S. Pension Plans						International Pension Plans						Postretirement Healthcare Plans
	2020			2019			2020			2019			2020		2019
Service cost	$	192		$	173		$	25		$	23		$	10	$	9
Other retirement plans (income) expense:
Interest cost		250			237			11			13			11		10
Expected return on plan assets		(400	)		(376	)		(13	)		(12	)		—		—
Amortization of prior service credit and other		(26	)		(30	)		(1	)		—			—		—
		(176	)		(169	)		(3	)		1			11		10
	$	16		$	4		$	22		$	24		$	21	$	19
	Nine Months Ended
	U.S. Pension Plans						International Pension Plans						Postretirement Healthcare Plans
	2020			2019			2020			2019			2020		2019
Service cost	$	576		$	517		$	73		$	72		$	31	$	26
Other retirement plans (income) expense:
Interest cost		750			713			33			38			33		30
Expected return on plan assets		(1,201	)		(1,129	)		(39	)		(36	)		—		—
Amortization of prior service credit and other		(78	)		(89	)		(2	)		(1	)		—		—
		(529	)		(505	)		(8	)		1			33		30
	$	47		$	12		$	65		$	73		$	64	$	56