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Retirement Plans (Tables)
 3 Months Ended
Aug. 31, 2020
Retirement Plan Tables [Abstract]  
Schedule of Retirement Plan Costs

Our retirement plans costs for the three-month periods ended August 31 were as follows (in millions):

 

 

 

2020

 

 

2019

 

Defined benefit pension plans, net

 

$

25

 

 

$

37

 

Defined contribution plans

 

 

159

 

 

 

142

 

Postretirement healthcare plans

 

 

21

 

 

 

22

 

 

 

$

205

 

 

$

201

 
Schedule of Net Periodic Benefit Cost

Net periodic benefit cost of the pension and postretirement healthcare plans for the three-month periods ended August 31 included the following components (in millions):

 

 

 

U.S. Pension Plans

 

 

International Pension Plans

 

 

Postretirement Healthcare Plans

 

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Service cost

 

$

213

 

 

$

192

 

 

$

23

 

 

$

24

 

 

$

11

 

 

$

11

 

Other retirement plans (income) expense:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Interest cost

 

 

240

 

 

 

250

 

 

 

10

 

 

 

11

 

 

 

10

 

 

 

11

 

    Expected return on plan assets

 

 

(446

)

 

 

(400

)

 

 

(12

)

 

 

(13

)

 

 

—

 

 

 

—

 

   Amortization of prior service credit and other

 

 

(2

)

 

 

(27

)

 

 

(1

)

 

 

—

 

 

 

—

 

 

 

—

 

 

 

 

(208

)

 

 

(177

)

 

 

(3

)

 

 

(2

)

 

 

10

 

 

 

11

 

 

 

$

5

 

 

$

15

 

 

$

20

 

 

$

22

 

 

$

21

 

 

$

22