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Debt - Narrative (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 30, 2021 | Jun. 28, 2021 | May 27, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | $ 8,307,640 |  | $ 8,307,640 |  | $ 6,444,925
Debt termination expense |  |  |  | 42,660 | $ 24,345 | 132,523 | $ 24,376 |
Level 2 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 8,311,100 |  | 8,311,100 |  | 6,536,500
Asset-Backed Securitization Warehouse Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | 1,125,000 |  | 1,125,000 |  |
Revolving credit facilities |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 755,000 |  | 755,000 |  | 760,500
Maximum borrowing capacity |  |  |  | 1,275,000 |  | 1,275,000 |  |
Line of Credit and Second Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  | 876,800 |  | 876,800 |  |
Capital lease obligations |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 15,619 |  | 15,619 |  | 17,304
Asset-backed securitization warehouse |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 320,000 |  | 320,000 |  | 264,000
Institutional notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 0 |  | 0 |  | 1,642,314
Repayments of debt | $ 648,900 | $ 821,000 |  |  |  |  |  |
Debt termination expense |  | 2,500 |  |  |  |  |  |
Redemption Premium | 43,100 | $ 84,800 |  |  |  |  |  |
Gain on write off unamortized debt costs and fair value adjustment | $ 600 |  |  |  |  |  |  |
Term loan facilities |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | 1,023,600 |  | 1,023,600 |  | 840,000
Maximum borrowing capacity |  |  |  | 1,518,600 |  | 1,518,600 |  |
Extinguishment of debt, amount |  |  | $ 820,000 |  |  |  |  |
Repayments of debt |  |  | 820,000 |  |  |  |  |
Debt termination expense |  |  | 1,800 |  |  |  |  |
Term loan, delayed drawing |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 1,200,000 | 1,200,000 |  | 1,200,000 |  |
Corporate notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt and Lease Obligation |  |  |  | $ 2,300,000 |  | $ 2,300,000 |  | $ 0
Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Finance Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option |  |  |  |  |  | 5 years |  |
Minimum | Corporate notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  | 2 years |  |
Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Finance Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option |  |  |  |  |  | 7 years |  |
Maximum | Corporate notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  | 10 years |  |
London Interbank Offered Rate (LIBOR) | Asset-Backed Securitization Warehouse Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 1.85% |  |
London Interbank Offered Rate (LIBOR) | Term loan facilities |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 2.85% |  |
London Interbank Offered Rate (LIBOR) | Term loan, delayed drawing |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 1.375% |  |  |  |  |

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