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Financing Receivables and Operating Lease Equipment - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Financing Receivables and Operating Lease Equipment [Line Items]      
Operating lease equipment $ 311 $ 352 $ 470
B-717      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing 447 478 563
Operating lease equipment   0 45
B747-8      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing 104 129 394
B-737      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing 112 156 186
Operating lease equipment 112 148 174
B-777      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing $ 188 194 209
Operating lease equipment   194 209
MD-80 Aircraft      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing     96
B-757 Aircraft      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing     107
B747-400      
Financing Receivables and Operating Lease Equipment [Line Items]      
Gross customer financing   $ 43 $ 46