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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Schedule of components net periodic (benefit) cost

The following table shows the components of net periodic (benefit) cost:
 
Pension Benefits
 
Other Postretirement and Postemployment Benefits
(in millions)
2019
2018
 
2019
2018
Three Months Ended September 30,
 
 
 
 
 
Service cost
$
—

$
—

 
$
21

$
21

Interest cost
208

195

 
34

32

Expected return on plan assets
(297
)
(329
)
 
(12
)
(17
)
Amortization of prior service credit
—

—

 
(2
)
(7
)
Recognized net actuarial loss
73

66

 
9

10

Settlements
2

—

 
—

—

Net periodic (benefit) cost
$
(14
)
$
(68
)
 
$
50

$
39

 
 
 
 
 
 
Nine Months Ended September 30,
 
 
 
 
 
Service cost
$
—

$
—

 
$
63

$
64

Interest cost
625

586

 
102

95

Expected return on plan assets
(890
)
(988
)
 
(36
)
(50
)
Amortization of prior service credit
—

—

 
(7
)
(20
)
Recognized net actuarial loss
219

199

 
29

27

Settlements
3

4

 
—

—

Net periodic (benefit) cost
$
(43
)
$
(199
)
 
$
151

$
116