FAIR VALUE MEASUREMENT - Recurring Fair Value Measurements (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Aug. 01, 2020	Aug. 03, 2019
Prepaid expenses and other current assets | Fair Value, Inputs, Level 1
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds		$ 7
Prepaid expenses and other current assets | Fair Value, Inputs, Level 1 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	$ 0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 1 | Foreign currency derivative | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 1 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 1 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 2
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds		0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 2 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	94
Prepaid expenses and other current assets | Fair Value, Inputs, Level 2 | Foreign currency derivative | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	26
Prepaid expenses and other current assets | Fair Value, Inputs, Level 2 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	36
Prepaid expenses and other current assets | Fair Value, Inputs, Level 2 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		389
Prepaid expenses and other current assets | Fair Value, Inputs, Level 3
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds		0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 3 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 3 | Foreign currency derivative | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 3 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Prepaid expenses and other current assets | Fair Value, Inputs, Level 3 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		0
Other assets | Fair Value, Inputs, Level 1
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds	1,678	1,799
Other assets | Fair Value, Inputs, Level 1 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Other assets | Fair Value, Inputs, Level 1 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		0
Other assets | Fair Value, Inputs, Level 2
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds	0	0
Other assets | Fair Value, Inputs, Level 2 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	23
Other assets | Fair Value, Inputs, Level 2 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		145
Other assets | Fair Value, Inputs, Level 3
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mutual funds	0	0
Other assets | Fair Value, Inputs, Level 3 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset	0
Other assets | Fair Value, Inputs, Level 3 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset		0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 1 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 1 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 1 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0	0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 2 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	357
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 2 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	197
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 2 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	46,743	16,360
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 3 | Foreign currency derivative | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 3 | Fuel derivatives | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0
Accrued expenses and other current liabilities | Fair Value, Inputs, Level 3 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0	0
Other long-term liabilities | Fair Value, Inputs, Level 1 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	0	0
Other long-term liabilities | Fair Value, Inputs, Level 2 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	91,994	60,737
Other long-term liabilities | Fair Value, Inputs, Level 3 | Interest rate swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	$ 0	$ 0