| Current Federal Tax Expense (Benefit) | -427.00K | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 8.32M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | -106.00K | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 7.79M | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 99.38M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | -2.17M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 0 | 2025-01-01 → 2025-12-31 |
| Operating Lease, Liability, Current | 14.57M | as of 2025-12-31 |
| Prepaid Expense and Other Assets, Current | 127.20M | as of 2025-12-31 |
| Other Accrued Liabilities, Current | 214.96M | as of 2025-12-31 |
| Investments, Fair Value Disclosure | 601.80M | as of 2025-12-31 |
| Share-based Payment Arrangement, Amount Capitalized | 5.59M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense | 91.93M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expensed and Capitalized, Amount | 97.52M | 2025-01-01 → 2025-12-31 |
| Related Party Transaction, Amounts of Transaction | 67.00M | 2025-01-01 → 2025-12-31 |
| Flight Equipment, Gross | 187.60M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 107.97M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 7.03M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 17.80M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Exercise of Option, Tax Benefit | 9.90M | 2025-01-01 → 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectAmount | -99.00K | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Amount | 3.54M | 2025-01-01 → 2025-12-31 |
| Letters of Credit Outstanding, Amount | 14.30M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 2.00M | 2025-01-01 → 2025-12-31 |
| SegmentExpenditureAdditionToLongLivedAssets | 660.43M | 2025-01-01 → 2025-12-31 |
| Net Income (Loss) Attributable to Parent, Diluted | 327.33M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount | 8.45M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 37.24M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | -1.38M | 2025-01-01 → 2025-12-31 |
| Treasury Stock, Value, Acquired, Cost Method | 379.79M | 2025-01-01 → 2025-12-31 |
| Long-Lived Assets | 9.52B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 449.90M | as of 2025-12-31 |
| Operating Lease, Cost | 17.40M | 2025-01-01 → 2025-12-31 |
| Short-term Lease, Cost | 21.83M | 2025-01-01 → 2025-12-31 |
| Variable Lease, Cost | 2.79M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 204.37M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 41.15M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 20.51M | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year One | 33.23M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Two | 32.96M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Three | 28.93M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Four | 1.36M | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, Year Five | 989.00K | as of 2025-12-31 |
| Finance Lease, Liability, to be Paid, after Year Five | 59.82M | as of 2025-12-31 |
| Finance Lease, Liability, Payment, Due | 157.29M | as of 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Writeoff | 11.53M | 2025-01-01 → 2025-12-31 |
| Accounts Receivable, Allowance for Credit Loss, Recovery | 6.68M | 2025-01-01 → 2025-12-31 |
| Finance Lease, Liability, Undiscounted Excess Amount | 55.73M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 146.11M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 148.27M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 148.94M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 150.76M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 151.24M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 3.55B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 4.29B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 618.15M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 2.65B | as of 2025-12-31 |
| Deferred Tax Assets, Net | 409.07M | as of 2025-12-31 |
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 13.50M | 2025-01-01 → 2025-12-31 |
| Long-term Debt, Gross | 10.63B | as of 2025-12-31 |
| Operating Lease, Lease Income, Lease Payments | 150.20M | 2025-01-01 → 2025-12-31 |
| Other Commitment, to be Paid, Year One | 429.53M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Two | 186.11M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Three | 65.21M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Four | 45.30M | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Five | 47.41M | as of 2025-12-31 |
| Other Commitment, to be Paid, after Year Five | 51.49M | as of 2025-12-31 |
| Other Commitment | 825.05M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 9.41M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 2.86B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 2.54B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 1.79B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 639.89M | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 2.80B | as of 2025-12-31 |
| Debt Instrument, Unamortized Discount (Premium), Net | 118.18M | as of 2025-12-31 |
| Operating Lease, Variable Lease Income | 60.41M | 2025-01-01 → 2025-12-31 |
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | 118.18M | as of 2025-12-31 |
| Unrecognized Tax Benefits | 160.41M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 27.33M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 11.09M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 9.02M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 96.60M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year One | 136.15M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Two | 120.31M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Three | 96.97M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Four | 70.53M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Five | 55.31M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, after Year Five | 220.49M | as of 2025-12-31 |
| Lessor, Operating Lease, Payments to be Received | 699.75M | as of 2025-12-31 |
| Income Tax Examination, Penalties and Interest Expense | 0 | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Domestic | 336.49M | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 177.65M | 2025-01-01 → 2025-12-31 |
| Interest Costs Capitalized | 49.70M | 2025-01-01 → 2025-12-31 |
| Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | 400.00K | 2025-01-01 → 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 97.46M | 2025-01-01 → 2025-12-31 |