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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Changes in Projected Benefit Obligations
The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018:
 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Benefit obligation at beginning of period
$
16,378

 
$
18,275

 
$
837

 
$
1,011

Service cost
2

 
3

 
3

 
5

Interest cost
703

 
674

 
33

 
35

Actuarial (gain) loss (1), (2)
1,965

 
(1,910
)
 
20

 
(133
)
Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(689
)
 
(662
)
 
(74
)
 
(81
)
Other
1

 
2

 
5

 
—

Benefit obligation at end of period
$
18,358

 
$
16,378

 
$
824

 
$
837


 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Fair value of plan assets at beginning of period
$
10,053

 
$
11,395

 
$
225

 
$
295

Actual return (loss) on plan assets
2,305

 
(1,151
)
 
41

 
(24
)
Employer contributions (3)
1,230

 
475

 
12

 
35

Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(689
)
 
(662
)
 
(74
)
 
(81
)
Fair value of plan assets at end of period
$
12,897

 
$
10,053

 
$
204

 
$
225

Funded status at end of period
$
(5,461
)
 
$
(6,325
)
 
$
(620
)
 
$
(612
)

 
(1) 
The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in our weighted average discount rate and mortality assumption and, in 2018, changes to our retirement rate assumptions.
(2) 
The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in our weighted average discount rate assumption and plan experience adjustments.
The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in our weighted average discount rate, medical trend and per capita claims assumptions.
(3) 
During 2019, we contributed $1.2 billion to our defined benefit pension plans, including supplemental contributions of $444 million and a $786 million minimum required contribution. During 2018, we contributed $475 million to our defined benefit pension plans, including supplemental contributions of $433 million and a $42 million minimum required contribution.
Schedule of Changes in Fair Value of Plan Assets
The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018:
 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Benefit obligation at beginning of period
$
16,378

 
$
18,275

 
$
837

 
$
1,011

Service cost
2

 
3

 
3

 
5

Interest cost
703

 
674

 
33

 
35

Actuarial (gain) loss (1), (2)
1,965

 
(1,910
)
 
20

 
(133
)
Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(689
)
 
(662
)
 
(74
)
 
(81
)
Other
1

 
2

 
5

 
—

Benefit obligation at end of period
$
18,358

 
$
16,378

 
$
824

 
$
837


 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Fair value of plan assets at beginning of period
$
10,053

 
$
11,395

 
$
225

 
$
295

Actual return (loss) on plan assets
2,305

 
(1,151
)
 
41

 
(24
)
Employer contributions (3)
1,230

 
475

 
12

 
35

Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(689
)
 
(662
)
 
(74
)
 
(81
)
Fair value of plan assets at end of period
$
12,897

 
$
10,053

 
$
204

 
$
225

Funded status at end of period
$
(5,461
)
 
$
(6,325
)
 
$
(620
)
 
$
(612
)

 
(1) 
The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in our weighted average discount rate and mortality assumption and, in 2018, changes to our retirement rate assumptions.
(2) 
The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in our weighted average discount rate assumption and plan experience adjustments.
The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in our weighted average discount rate, medical trend and per capita claims assumptions.
(3) 
During 2019, we contributed $1.2 billion to our defined benefit pension plans, including supplemental contributions of $444 million and a $786 million minimum required contribution. During 2018, we contributed $475 million to our defined benefit pension plans, including supplemental contributions of $433 million and a $42 million minimum required contribution.
Schedule of Amounts Recognized in Consolidated Balance Sheets
Balance Sheet Position
 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
As of December 31,
 
 
 
 
 
 
 
Current liability
$
5

 
$
7

 
$
24

 
$
23

Noncurrent liability
5,456

 
6,318

 
596

 
589

Total liabilities
$
5,461

 
$
6,325

 
$
620

 
$
612
Schedule of Amounts Recognized in Other Comprehensive Income
Net actuarial loss (gain)
$
5,680

 
$
5,356

 
$
(426
)
 
$
(452
)
Prior service cost (benefit)
104

 
131

 
(120
)
 
(362
)
Total accumulated other comprehensive loss (income), pre-tax
$
5,784

 
$
5,487

 
$
(546
)
 
$
(814
)
Schedule of Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets
Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets
 
Pension Benefits
 
Retiree Medical and 
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Projected benefit obligation
$
18,327

 
$
16,351

 
$
—

 
$
—

Accumulated benefit obligation (ABO)
18,315

 
16,341

 
—

 
—

Accumulated postretirement benefit obligation
—

 
—

 
824

 
837

Fair value of plan assets
12,862

 
10,023

 
204

 
225

ABO less fair value of plan assets
5,453

 
6,318

 
—

 
—
Components of Net Periodic Benefit Cost (Income)
Net Periodic Benefit Cost (Income)
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2017
 
2019
 
2018
 
2017
 
 
 
 
 
 
 
 
 
 
 
 
 
(In millions)
Defined benefit plans:
 
 
 
 
 
 
 
 
 
 
 
Service cost
$
2

 
$
3

 
$
2

 
$
3

 
$
5

 
$
4

Interest cost
703

 
674

 
721

 
33

 
35

 
39

Expected return on assets
(815
)
 
(905
)
 
(790
)
 
(15
)
 
(24
)
 
(21
)
Settlements
—

 
—

 
1

 
—

 
—

 
—

Amortization of:
 
 
 
 
 
 
 
 
 
 
 
Prior service cost (benefit)
28

 
28

 
28

 
(236
)
 
(236
)
 
(237
)
Unrecognized net loss (gain)
150

 
141

 
144

 
(31
)
 
(21
)
 
(23
)
Net periodic benefit cost (income)
$
68

 
$
(59
)
 
$
106

 
$
(246
)
 
$
(241
)
 
$
(238
)
Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost
The following actuarial assumptions were used to determine our benefit obligations and net periodic benefit cost (income) for the periods presented:
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
Benefit obligations:
 
 
 
 
 
 
 
Weighted average discount rate
3.4%
 
4.4%
 
3.3%
 
4.3%
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2017
 
2019
 
2018
 
2017
Net periodic benefit cost (income):
 
 
 
 
 
 
 
 
 
 
 
Weighted average discount rate
4.4%
 
3.8%
 
4.3%
 
4.3%
 
3.6%
 
4.1%
Weighted average expected rate of return on plan assets
8.0%
 
8.0%
 
8.0%
 
8.0%
 
8.0%
 
8.0%
Weighted average health care cost trend rate assumed for next year (1)
N/A
 
N/A
 
N/A
 
3.7%
 
3.9%
 
4.2%
 
(1) 
The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter.
Schedule of One Percentage Point Change in Assumed Health Care Cost Trend Rates
A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on our retiree medical and other postretirement benefits plans (in millions):
 
1% Increase
 
1% Decrease
Increase (decrease) on 2019 service and interest cost
$
1

 
$
(1
)
Increase (decrease) on benefit obligation as of December 31, 2019
40

 
(40
)
Schedule of Expected Future Service Benefit Payments
The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions):
 
2020
 
2021
 
2022
 
2023
 
2024
 
2025-2029
Pension benefits
$
753

 
$
792

 
$
832

 
$
874

 
$
914

 
$
5,045

Retiree medical and other postretirement benefits
80

 
71

 
66

 
64

 
61

 
265
Schedule of Allocation of Plan Assets The current strategic target asset allocation is as follows:
Asset Class/Sub-Class
Allowed Range
Equity
45% - 80%
Public:
 
U.S. Large
15% - 40%
U.S. Small/Mid
2% - 10%
International
10% - 25%
Emerging Markets
2% - 15%
Alternative Investments
5% - 30%
Fixed Income
20% - 55%
Public:
 
U.S. Long Duration
15% - 45%
High Yield and Emerging Markets
0% - 10%
Private Income
0% - 10%
Other
0% - 5%
Cash Equivalents
0% - 20%
Changes in Fair Value Measurements of Level 3 Investments
Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019, were as follows (in millions):
 
Private Market Partnerships
 
Insurance Group
Annuity Contracts
Beginning balance at December 31, 2018
$
7

 
$
2

Purchases
3

 
—

Ending balance at December 31, 2019
$
10

 
$
2

Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018, were as follows (in millions):
 
Private Market
Partnerships
 
Insurance Group
Annuity Contracts
Beginning balance at December 31, 2017
$
14

 
$
2

Actual loss on plan assets:
 
 
 
Relating to assets still held at the reporting date
(2
)
 
—

Purchases
1

 
—

Sales
(6
)
 
—

Ending balance at December 31, 2018
$
7

 
$
2
Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Allocation of Plan Assets
The fair value of our pension plan assets at December 31, 2019 and 2018, by asset category, were as follows (in millions):
 
Fair Value Measurements as of December 31, 2019
Asset Category
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Cash and cash equivalents
$
20

 
$
—

 
$
—

 
$
20

Equity securities:
 
 
 
 
 
 
 
International markets (a), (b)
2,769

 
—

 
—

 
2,769

Large-cap companies (b)
2,312

 
—

 
—

 
2,312

Mid-cap companies (b)
543

 
—

 
—

 
543

Small-cap companies (b)
97

 
—

 
—

 
97

Mutual funds (c)
68

 
—

 
—

 
68

Fixed income:
 
 
 
 
 
 
 
Corporate debt (d)
—

 
2,804

 
—

 
2,804

Government securities (e)
—

 
923

 
—

 
923

U.S. municipal securities
—

 
51

 
—

 
51

Mortgage backed securities
—

 
4

 
—

 
4

Alternative instruments:
 
 
 
 
 
 
 
Private market partnerships (f)
—

 
—

 
10

 
10

Private market partnerships measured at net asset value (f), (g)
—

 
—

 
—

 
1,464

Common/collective trusts (h)
—

 
358

 
—

 
358

Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h)
—

 
—

 
—

 
1,423

Insurance group annuity contracts
—

 
—

 
2

 
2

Dividend and interest receivable
53

 
—

 
—

 
53

Due to/from brokers for sale of securities – net
(4
)
 
—

 
—

 
(4
)
Total
$
5,858

 
$
4,140

 
$
12

 
$
12,897

 
(a) 
Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country.
(b) 
There are no significant concentrations of holdings by company or industry.
(c) 
Investment includes mutual funds invested 40% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 33% in U.S. treasuries and corporate bonds and 27% in equity securities of international companies.
(d) 
Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies.
(e) 
Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification.
(f) 
Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years. Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years.
(g) 
Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements.
(h) 
Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
 
Fair Value Measurements as of December 31, 2018
Asset Category
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Cash and cash equivalents
$
23

 
$
—

 
$
—

 
$
23

Equity securities:
 
 
 
 
 
 
 
International markets (a), (b)
3,181

 
—

 
—

 
3,181

Large-cap companies (b)
2,021

 
—

 
—

 
2,021

Mid-cap companies (b)
583

 
—

 
—

 
583

Small-cap companies (b)
122

 
—

 
—

 
122

Mutual funds (c)
52

 
—

 
—

 
52

Fixed income:
 
 
 
 
 
 
 
Corporate debt (d)
—

 
2,116

 
—

 
2,116

Government securities (e)
—

 
228

 
—

 
228

U.S. municipal securities
—

 
40

 
—

 
40

Alternative instruments:
 
 
 
 
 
 
 
Private market partnerships (f)
—

 
—

 
7

 
7

Private market partnerships measured at net asset value (f), (g)
—

 
—

 
—

 
1,188

Common/collective trusts (h)
—

 
218

 
—

 
218

Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h)
—

 
—

 
—

 
227

Insurance group annuity contracts
—

 
—

 
2

 
2

Dividend and interest receivable
47

 
—

 
—

 
47

Due to/from brokers for sale of securities – net
5

 
—

 
—

 
5

Other liabilities – net
(7
)
 
—

 
—

 
(7
)
Total
$
6,027

 
$
2,602

 
$
9

 
$
10,053

 
(a) 
Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country.
(b) 
There are no significant concentrations of holdings by company or industry.
(c) 
Investment includes mutual funds invested 37% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 38% in U.S. treasuries and corporate bonds and 25% in equity securities of international companies.
(d) 
Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies.
(e) 
Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification.
(f) 
Includes limited partnerships that invest primarily in U.S. (94%) and European (6%) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years. Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years.
(g) 
Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements.
(h) 
Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
Retiree Medical And Other Postretirement Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Allocation of Plan Assets
The fair value of our retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions):
 
Fair Value Measurements as of December 31, 2019
Asset Category
Quoted Prices in
Active Markets for Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Money market fund
$
4

 
$
—

 
$
—

 
$
4

Mutual funds – AAL Class
—

 
200

 
—

 
200

Total
$
4

 
$
200

 
$
—

 
$
204

 
Fair Value Measurements as of December 31, 2018
Asset Category
Quoted Prices in
Active Markets for Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Money market fund
$
4

 
$
—

 
$
—

 
$
4

Mutual funds – AAL Class
—

 
221

 
—

 
221

Total
$
4

 
$
221

 
$
—

 
$
225
American Airlines, Inc. [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Changes in Projected Benefit Obligations
The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018:
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Benefit obligation at beginning of period
$
16,282

 
$
18,175

 
$
837

 
$
1,010

Service cost
2

 
2

 
3

 
5

Interest cost
699

 
670

 
33

 
35

Actuarial (gain) loss (1), (2)
1,951

 
(1,905
)
 
20

 
(132
)
Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(686
)
 
(659
)
 
(74
)
 
(81
)
Other
—

 
3

 
5

 
—

Benefit obligation at end of period
$
18,246

 
$
16,282

 
$
824

 
$
837

 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Fair value of plan assets at beginning of period
$
10,001

 
$
11,340

 
$
225

 
$
295

Actual return (loss) on plan assets
2,292

 
(1,148
)
 
41

 
(24
)
Employer contributions (3)
1,224

 
472

 
12

 
35

Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(686
)
 
(659
)
 
(74
)
 
(81
)
Fair value of plan assets at end of period
$
12,829

 
$
10,001

 
$
204

 
$
225

Funded status at end of period
$
(5,417
)
 
$
(6,281
)
 
$
(620
)
 
$
(612
)

 

(1) 
The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in American’s weighted average discount rate and mortality assumption and, in 2018, changes to American’s retirement rate assumptions.
(2) 
The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in American’s weighted average discount rate assumption and plan experience adjustments.
The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in American’s weighted average discount rate, medical trend and per capita claims assumptions.
(3) 
During 2019, American contributed $1.2 billion to its defined benefit pension plans, including supplemental contributions of $444 million and a $780 million minimum required contribution. During 2018, American contributed $472 million to its defined benefit pension plans, including supplemental contributions of $433 million and a $39 million minimum required contribution.
Schedule of Changes in Fair Value of Plan Assets
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Fair value of plan assets at beginning of period
$
10,001

 
$
11,340

 
$
225

 
$
295

Actual return (loss) on plan assets
2,292

 
(1,148
)
 
41

 
(24
)
Employer contributions (3)
1,224

 
472

 
12

 
35

Settlements
(2
)
 
(4
)
 
—

 
—

Benefit payments
(686
)
 
(659
)
 
(74
)
 
(81
)
Fair value of plan assets at end of period
$
12,829

 
$
10,001

 
$
204

 
$
225

Funded status at end of period
$
(5,417
)
 
$
(6,281
)
 
$
(620
)
 
$
(612
)

 

(1) 
The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in American’s weighted average discount rate and mortality assumption and, in 2018, changes to American’s retirement rate assumptions.
(2) 
The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in American’s weighted average discount rate assumption and plan experience adjustments.
The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in American’s weighted average discount rate, medical trend and per capita claims assumptions.
(3) 
During 2019, American contributed $1.2 billion to its defined benefit pension plans, including supplemental contributions of $444 million and a $780 million minimum required contribution. During 2018, American contributed $472 million to its defined benefit pension plans, including supplemental contributions of $433 million and a $39 million minimum required contribution.
Schedule of Amounts Recognized in Consolidated Balance Sheets
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
As of December 31,
 
Current liability
$
5

 
$
7

 
$
24

 
$
23

Noncurrent liability
5,412

 
6,274

 
596

 
589

Total liabilities
$
5,417

 
$
6,281

 
$
620

 
$
612
Schedule of Amounts Recognized in Other Comprehensive Income
Net actuarial loss (gain)
$
5,662

 
$
5,341

 
$
(426
)
 
$
(452
)
Prior service cost (benefit)
102

 
131

 
(120
)
 
(362
)
Total accumulated other comprehensive loss (income), pre-tax
$
5,764

 
$
5,472

 
$
(546
)
 
$
(814
)
Schedule of Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets
Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
(In millions)
Projected benefit obligation
$
18,215

 
$
16,254

 
$
—

 
$
—

Accumulated benefit obligation (ABO)
18,204

 
16,246

 
—

 
—

Accumulated postretirement benefit obligation
—

 
—

 
824

 
837

Fair value of plan assets
12,794

 
9,971

 
204

 
225

ABO less fair value of plan assets
5,410

 
6,275

 
—

 
—
Components of Net Periodic Benefit Cost (Income)
 
Pension Benefits
 
Retiree Medical and
  Other Postretirement Benefits  
 
2019
 
2018
 
2017
 
2019
 
2018
 
2017
 
 
 
 
 
 
 
 
 
 
 
 
 
(In millions)
Defined benefit plans:
 
 
 
 
 
 
 
 
 
 
 
Service cost
$
2

 
$
2

 
$
2

 
$
3

 
$
5

 
$
4

Interest cost
699

 
670

 
717

 
33

 
35

 
39

Expected return on assets
(811
)
 
(901
)
 
(786
)
 
(15
)
 
(24
)
 
(21
)
Settlements
—

 
—

 
1

 
—

 
—

 
—

Amortization of:
 
 
 
 
 
 
 
 
 
 
 
Prior service cost (benefit)
28

 
28

 
28

 
(236
)
 
(236
)
 
(237
)
Unrecognized net loss (gain)
150

 
140

 
144

 
(31
)
 
(21
)
 
(23
)
Net periodic benefit cost (income)
$
68

 
$
(61
)
 
$
106

 
$
(246
)
 
$
(241
)
 
$
(238
)
Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost
The following actuarial assumptions were used to determine American’s benefit obligations and net periodic benefit cost (income) for the periods presented:
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2019
 
2018
Benefit obligations:
 
 
 
 
 
 
 
Weighted average discount rate
3.4%
 
4.4%
 
3.3%
 
4.3%
 
Pension Benefits
 
Retiree Medical and
Other Postretirement Benefits
 
2019
 
2018
 
2017
 
2019
 
2018
 
2017
Net periodic benefit cost (income):
 
 
 
 
 
 
 
 
 
 
 
Weighted average discount rate
4.4%
 
3.8%
 
4.3%
 
4.3%
 
3.6%
 
4.1%
Weighted average expected rate of return on plan assets
8.0%
 
8.0%
 
8.0%
 
8.0%
 
8.0%
 
8.0%
Weighted average health care cost trend rate assumed for next year (1)
N/A
 
N/A
 
N/A
 
3.7%
 
3.9%
 
4.2%
 
(1) 
The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter.
Schedule of One Percentage Point Change in Assumed Health Care Cost Trend Rates
A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on American’s retiree medical and other postretirement benefits plans (in millions):
 
1% Increase
 
1% Decrease
Increase (decrease) on 2019 service and interest cost
$
1

 
$
(1
)
Increase (decrease) on benefit obligation as of December 31, 2019
40

 
(40
)
Schedule of Expected Future Service Benefit Payments
The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions):
 
2020
 
2021
 
2022
 
2023
 
2024
 
2025-2029
Pension benefits
$
749

 
$
788

 
$
827

 
$
869

 
$
910

 
$
5,017

Retiree medical and other postretirement benefits
80

 
71

 
66

 
64

 
61

 
265
Schedule of Allocation of Plan Assets The current strategic target asset allocation is as follows:
Asset Class/Sub-Class
Allowed Range
Equity
45% - 80%
Public:
 
U.S. Large
15% - 40%
U.S. Small/Mid
2% - 10%
International
10% - 25%
Emerging Markets
2% - 15%
Alternative Investments
5% - 30%
Fixed Income
20% - 55%
Public:
 
U.S. Long Duration
15% - 45%
High Yield and Emerging Markets
0% - 10%
Private Income
0% - 10%
Other
0% - 5%
Cash Equivalents
0% - 20%
Changes in Fair Value Measurements of Level 3 Investments
Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019, were as follows (in millions):
 
Private Market Partnerships
 
Insurance Group
Annuity Contracts
Beginning balance at December 31, 2018
$
7

 
$
2

Purchases
3

 
—

Ending balance at December 31, 2019
$
10

 
$
2

Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018, were as follows (in millions):
 
Private Market
Partnerships
 
Insurance Group
Annuity Contracts
Beginning balance at December 31, 2017
$
14

 
$
2

Actual loss on plan assets:
 
 
 
Relating to assets still held at the reporting date
(2
)
 
—

Purchases
1

 
—

Sales
(6
)
 
—

Ending balance at December 31, 2018
$
7

 
$
2
American Airlines, Inc. [Member] | Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Allocation of Plan Assets
The fair value of American’s pension plan assets at December 31, 2019 and 2018, by asset category, were as follows (in millions):
 
Fair Value Measurements as of December 31, 2019
Asset Category
Quoted Prices in
Active Markets 
for Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Cash and cash equivalents
$
20

 
$
—

 
$
—

 
$
20

Equity securities:
 
 
 
 
 
 
 
International markets (a), (b)
2,769

 
—

 
—

 
2,769

Large-cap companies (b)
2,312

 
—

 
—

 
2,312

Mid-cap companies (b)
543

 
—

 
—

 
543

Small-cap companies (b)
97

 
—

 
—

 
97

Fixed income:
 
 
 
 
 
 
 
Corporate debt (c)
—

 
2,804

 
—

 
2,804

Government securities (d)
—

 
923

 
—

 
923

U.S. municipal securities
—

 
51

 
—

 
51

Mortgage backed securities
—

 
4

 
—

 
4

Alternative instruments:
 
 
 
 
 
 
 
Private market partnerships (e)
—

 
—

 
10

 
10

Private market partnerships measured at net asset value (e), (f)
—

 
—

 
—

 
1,464

Common/collective trusts (g)
—

 
358

 
—

 
358

Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g)
—

 
—

 
—

 
1,423

Insurance group annuity contracts
—

 
—

 
2

 
2

Dividend and interest receivable
53

 
—

 
—

 
53

Due to/from brokers for sale of securities – net
(4
)
 
—

 
—

 
(4
)
Total
$
5,790

 
$
4,140

 
$
12

 
$
12,829

 
(a) 
Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country.
(b) 
There are no significant concentrations of holdings by company or industry.
(c) 
Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies.
(d) 
Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification.
(e) 
Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years. Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years.
(f) 
Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements.
(g) 
Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
 
Fair Value Measurements as of December 31, 2018
Asset Category
Quoted Prices in
Active Markets 
for Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Cash and cash equivalents
$
23

 
$
—

 
$
—

 
$
23

Equity securities:
 
 
 
 
 
 
 
International markets (a), (b)
3,181

 
—

 
—

 
3,181

Large-cap companies (b)
2,021

 
—

 
—

 
2,021

Mid-cap companies (b)
583

 
—

 
—

 
583

Small-cap companies (b)
122

 
—

 
—

 
122

Fixed income:
 
 
 
 
 
 
 
Corporate debt (c)
—

 
2,116

 
—

 
2,116

Government securities (d)
—

 
228

 
—

 
228

U.S. municipal securities
—

 
40

 
—

 
40

Alternative instruments:
 
 
 
 
 
 
 
Private market partnerships (e)
—

 
—

 
7

 
7

Private market partnerships measured at net asset value (e), (f)
—

 
—

 
—

 
1,188

Common/collective trusts (g)
—

 
218

 
—

 
218

Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g)
—

 
—

 
—

 
227

Insurance group annuity contracts
—

 
—

 
2

 
2

Dividend and interest receivable
47

 
—

 
—

 
47

Due to/from brokers for sale of securities – net
5

 
—

 
—

 
5

Other liabilities – net
(7
)
 
—

 
—

 
(7
)
Total
$
5,975

 
$
2,602

 
$
9

 
$
10,001

 
(a) 
Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country.
(b) 
There are no significant concentrations of holdings by company or industry.
(c) 
Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies.
(d) 
Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification.
(e) 
Includes limited partnerships that invest primarily in U.S. (94%) and European (6%) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years. Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years.
(f) 
Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements.
(g) 
Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Allocation of Plan Assets
The fair value of American’s retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions):
 
Fair Value Measurements as of December 31, 2019
Asset Category
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Money market fund
$
4

 
$
—

 
$
—

 
$
4

Mutual funds – AAL Class
—

 
200

 
—

 
200

Total
$
4

 
$
200

 
$
—

 
$
204

 
Fair Value Measurements as of December 31, 2018
Asset Category
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Total
Money market fund
$
4

 
$
—

 
$
—

 
$
4

Mutual funds – AAL Class
—

 
221

 
—

 
221

Total
$
4

 
$
221

 
$
—

 
$
225