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Post-Employment Benefits (Tables)
6 Months Ended
Jun. 30, 2021
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

Six Months

Three Months

Six Months

(in millions)

Ended June 30

Ended June 30

Ended June 30

Ended June 30

    

2021

    

2020

    

2021

    

2020

    

2021

    

2020

    

2021

    

2020

Service cost — benefits earned during the period

$

96

$

81

$

196

$

166

$

14

$

11

$

28

$

23

Interest cost on projected benefit obligations

 

62

 

74

 

124

 

149

 

9

 

9

 

17

 

21

Expected return on plan assets

 

(211)

 

(191)

 

(422)

 

(383)

 

(7)

 

(7)

 

(14)

 

(14)

Net amortization of:

Actuarial loss, net

 

78

 

64

 

159

 

127

 

7

 

2

 

14

 

10

Prior service cost (credit)

 

1

 

1

 

1

 

1

 

(7)

 

(7)

 

(14)

 

(14)

Net cost — continuing operations

$

26

$

29

$

58

$

60

$

16

$

8

$

31

$

26