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v3.19.1

Debt (Details) - USD ($) |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 08, 2019 | Mar. 31, 2019 | Feb. 07, 2019 | Feb. 06, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |  |
Debt outstanding on facilities with fixed interest rates |  | $ 4,484,600,000 |  |  |
Debt Instrument Interest Rate During Period Fixed Rate Debt |  | 4.26% |  |  |
Long Term Debt, Percentage Bearing Fixed Interest Rate Remaining Term |  | 3 years 9 months 26 days |  |  |
Debt outstanding on facilities with interest rates based on floating rate indices |  | $ 2,943,100,000 |  |  |
Debt Instrument Interest Rate During Period Variable Rate Debt |  | 4.22% |  |  |
Long Term Debt, Percentage Bearing Variable Interest Rate Remaining Term |  | 3 years 6 months 12 days |  |  |
Percentage of Debt Hedged by Interest Rate Derivatives |  | 84.00% |  |  |
Debt Instrument Interest Rate During Period Fixed Rate and Interest Swap Rate Debt |  | 4.17% |  |  |
Hedged Portion of Debt Average Remaining Maturity |  | 4 years 6 days |  |  |
Debt Instrument, Interest Rate During Period |  | 4.18% |  |  |
Debt termination expense |  | $ 0 |  |  |
Institutional Notes [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and Capital Lease Obligations |  | $ 2,167,257,000 |  |  | $ 2,198,200,000
Debt Instrument, Interest Rate, Effective Percentage |  | 4.73% |  |  |
Asset-backed securitization term notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and Capital Lease Obligations |  | $ 2,967,601,000 |  |  | 3,063,821,000
Debt Instrument, Interest Rate, Effective Percentage |  | 3.95% |  |  |
Term Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.06% |  |  |
Asset Backed Warehouse Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and Capital Lease Obligations |  | $ 350,000,000 |  |  | 340,000,000
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 81.00% |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.24% |  |  |
Maximum borrowing capacity |  | $ 1,200,000,000.0 |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 400,000,000 |  |  |
Revolving credit facilities |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and Capital Lease Obligations |  | $ 365,000,000 |  |  | 375,000,000
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 83.00% |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.49% |  |  |
Maximum borrowing capacity |  | $ 1,235,000,000 | $ 300,000,000 | $ 800,000,000 |
Capital lease obligations |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and Capital Lease Obligations |  | 73,399,000 |  |  | $ 75,526,000
Interest Rate Swap [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Net notional amount |  | $ 1,753,300,000 |  |  |
Net Notional Amount of Interest Rate During Period |  | 2.24% |  |  |
Weighted Average Remaining Term |  | 4 years 5 months 7 days |  |  |
Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option |  | 3 years |  |  |
Minimum [Member] | Institutional Notes [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Term |  | 7 years |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 83.00% |  |  |
Minimum [Member] | Asset-backed securitization term notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 77.00% |  |  |
Minimum [Member] | Term Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 79.00% |  |  |
Minimum [Member] | Asset Backed Warehouse Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Bank Account Maintenance Required Amount Balance, Interest Expense |  | 3 months |  |  |
Minimum [Member] | Capital lease obligations |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 3.60% |  |  |
Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital Lease Period Over Which Interest Expense Recognized Preceding Early Purchase Option |  | 10 years |  |  |
Maximum [Member] | Institutional Notes [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Term |  | 12 years |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 85.00% |  |  |
Maximum [Member] | Asset-backed securitization term notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 87.00% |  |  |
Maximum [Member] | Term Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Advance Rate Used in Calculating Borrowing Capacity |  | 83.00% |  |  |
Maximum [Member] | Capital lease obligations |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.93% |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Asset Backed Warehouse Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  |  |  |
Pre-Conversion [Member] | London Interbank Offered Rate (LIBOR) [Member] | Asset Backed Warehouse Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.85% | 1.85% |  |  |
Post-Conversion [Member] | London Interbank Offered Rate (LIBOR) [Member] | Asset Backed Warehouse Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 2.85% |  |  |
Interest Rate Swap [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument Interest Rate During Period Variable Rate Debt |  | 4.06% |  |  |
Debt and Capital Lease Obligations |  | $ 6,237,900,000 |  |  |

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