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Employee Benefit Plans
 9 Months Ended
Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans
Employee Benefit Plans
The following table provides the components of net periodic benefit cost (income) (in millions):
 
 
Pension Benefits
 
Retiree Medical and Other
Postretirement Benefits
Three Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
 
$
1

 
$
1

 
$
1

 
$
1

Interest cost
 
169

 
180

 
9

 
10

Expected return on assets
 
(226
)
 
(198
)
 
(6
)
 
(5
)
Amortization of:
 
 
 
 
 
 
 
 
Prior service cost (benefit)
 
7

 
7

 
(59
)
 
(59
)
Unrecognized net loss (gain)
 
36

 
36

 
(5
)
 
(6
)
Net periodic benefit cost (income)
 
$
(13
)
 
$
26

 
$
(60
)
 
$
(59
)
 
 
 
 
 
 
 
 
 
 
 
Pension Benefits
 
Retiree Medical and Other
Postretirement Benefits
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
 
$
2

 
$
2

 
$
3

 
$
3

Interest cost
 
507

 
541

 
26

 
29

Expected return on assets
 
(678
)
 
(592
)
 
(17
)
 
(16
)
Amortization of:
 
 
 
 
 
 
 
 
Prior service cost (benefit)
 
21

 
21

 
(178
)
 
(178
)
Unrecognized net loss (gain)
 
108

 
108

 
(15
)
 
(17
)
Net periodic benefit cost (income)
 
$
(40
)
 
$
80

 
$
(181
)
 
$
(179
)

Effective November 1, 2012, substantially all of our defined benefit pension plans were frozen.
The components of net periodic benefit income other than the service cost component are included in nonoperating other income, net in the condensed consolidated statements of operations.
During the first nine months of 2018, we contributed $467 million to our defined benefit pension plans, including supplemental contributions of $425 million in addition to a $42 million minimum required contribution.
American Airlines, Inc. [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans
Employee Benefit Plans
The following table provides the components of net periodic benefit cost (income) (in millions):
 
 
Pension Benefits
 
Retiree Medical and Other
Postretirement Benefits
Three Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
 
$
1

 
$
—

 
$
1

 
$
1

Interest cost
 
168

 
179

 
9

 
10

Expected return on assets
 
(225
)
 
(197
)
 
(6
)
 
(5
)
Amortization of:
 
 
 
 
 
 
 
 
Prior service cost (benefit)
 
7

 
7

 
(59
)
 
(59
)
Unrecognized net loss (gain)
 
35

 
36

 
(5
)
 
(6
)
Net periodic benefit cost (income)
 
$
(14
)
 
$
25

 
$
(60
)
 
$
(59
)
 
 
 
 
 
 
 
 
 
 
 
Pension Benefits
 
Retiree Medical and Other
Postretirement Benefits
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
 
$
2

 
$
1

 
$
3

 
$
3

Interest cost
 
504

 
538

 
26

 
29

Expected return on assets
 
(675
)
 
(589
)
 
(17
)
 
(16
)
Amortization of:
 
 
 
 
 
 
 
 
Prior service cost (benefit)
 
21

 
21

 
(178
)
 
(178
)
Unrecognized net loss (gain)
 
107

 
108

 
(15
)
 
(17
)
Net periodic benefit cost (income)
 
$
(41
)
 
$
79

 
$
(181
)
 
$
(179
)

Effective November 1, 2012, substantially all of American’s defined benefit pension plans were frozen.
The components of net periodic benefit income other than the service cost component are included in nonoperating other income, net in the condensed consolidated statements of operations.
During the first nine months of 2018, American contributed $464 million to its defined benefit pension plans, including supplemental contributions of $425 million in addition to a $39 million minimum required contribution.