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Leases, Codification Topic 842 (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Leases [Abstract] |  |
Schedule of Lease Assets | At December 31, 2019, the Operating lease assets balance by asset class was as follows (in millions):
| December 31, 2019
Aircraft | $ | 1,049 |
CPA Aircraft | 596 |
Airport and terminal facilities | 18 |
Corporate real estate and other | 48 |
Total Operating lease assets | $ | 1,711 |
Lease, Cost | The impact of leases, including variable lease cost, on earnings for the twelve months ended December 31, 2019 was as follows (in millions):
| Classification | 2019
Expense |  |
Aircraft | Aircraft rent | $ | 246 |
CPA Aircraft | Aircraft rent | 79
Airport and terminal facilities | Landing fees and other rentals | 324
Corporate real estate and other | Landing fees and other rentals | 19
Total lease expense |  | $ | 668 |
Revenue |  |
Lease income | Cargo and other revenues | (13) |
Net lease impact |  | $ | 655 |
Lessee, Operating Lease, Liability, Maturity | Future minimum lease payments under non-cancellable leases as of December 31, 2019 (in millions):
| Aircraft |  | CPA Aircraft |  | Airport and Terminal Facilities |  | Corporate Real Estate and Other
2020 | $ | 245 |  |  | $ | 79 |  |  | $ | 3 |  |  | $ | 8 |
2021 | 216 |  |  | 79 |  |  | 2 |  |  | 6 |
2022 | 190 |  |  | 79 |  |  | 2 |  |  | 5 |
2023 | 133 |  |  | 79 |  |  | 2 |  |  | 5 |
2024 | 81 |  |  | 79 |  |  | 2 |  |  | 5 |
Thereafter | 331 |  |  | 329 |  |  | 11 |  |  | 74 |
Total Lease Payments | $ | 1,196 |  |  | $ | 724 |  |  | $ | 22 |  |  | $ | 103 |
Less: Imputed interest | (151) |  |  | (128) |  |  | (4) |  |  | (54) |
Total | $ | 1,045 |  |  | $ | 596 |  |  | $ | 18 |  |  | $ | 49 |
Schedule of Future Minimum Rental Payments for Operating Leases |  | Future minimum lease payments under noncancelable operating leases were as follows as of December 31, 2018 (in millions):
| Aircraft Leases |  | Facility Leases
2019 | $ | 350 |  |  | $ | 133 |
2020 | 320 |  | 124
2021 | 286 |  | 113
2022 | 262 |  | 94
2023 | 208 |  | 26
Thereafter | 847 |  | 122
Total | $ | 2,273 |  |  | $ | 612 |
Weighted Average Lease Assumptions | The weighted average IBR and weighted average remaining lease term (in years) for all asset classes were as follows at December 31, 2019.
| Weighted Average IBR |  |  | Weighted Average Remaining Lease term
Aircraft | 4.0 | % |  | 7.0
CPA Aircraft | 4.3 | % |  | 9.2
Airports and terminal facilities | 4.1 | % |  | 10.0
Corporate real estate and other | 4.2 | % |  | 34.9

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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