BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 25, 2019 USD ($)	Nov. 30, 2019 USD ($) store_format shares	Dec. 01, 2018 USD ($)	Nov. 30, 2019 USD ($) division store_format segment shares	Dec. 01, 2018 USD ($)	Feb. 23, 2019 USD ($) shares	Feb. 24, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash		$ 10.2		$ 10.2		$ 41.6
LIFO expense (benefit)		2.6	$ 2.8	18.9	$ 15.7
Equity-based compensation expense		0.9		3.0
Compensation cost not yet recognized		7.8		$ 7.8
Period for recognition of unrecognized compensation cost				4 years
Fair value of equity interests deemed granted	$ 10.8
Percent of awards excluded from fair value computation, due to unestablished performance targets	40.00%
Repurchase of common stock				$ 0.0	25.8	25.8
Income tax expense (benefit)		$ 12.9	(65.4)	$ 110.5	(80.3)
Effective tax rate		19.10%		21.70%
Tax benefit adjustment for retirement of the transition tax and the remeasurement of deferred taxes						60.3
Number of divisions | division				13
Number of reportable segments | segment				1
Number of store format | store_format		1		1
Receivables, net		$ 501.2		$ 501.2		586.2
Contract liability related to gift cards		57.6		57.6		55.9
Right-of-use assets		5,836.1		5,836.1
Lease liabilities		5,980.2		5,980.2
Adoption of new accounting standards, net of tax							$ 574.6
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets							5,300.0
Lease liabilities							5,400.0
Cumulative effect adjustment							776.0
Adoption of new accounting standards, net of tax							574.6
ASU 2016-02, Deferred Gains On Sale-Leaseback
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment							865.8
ASU 2016-02, Impairment Loss
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment							(87.3)
ASU 2016-02, Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment							(17.2)
ASU 2016-02, Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment							(14.7)
ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of new accounting standards, net of tax							$ 16.6
Pharmacy
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net		225.1		225.1		$ 252.2
Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of shares repurchased (in shares) | shares						1,772,018
Phantom units
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity-based compensation expense		6.3	9.9	21.8	35.5
Income tax benefit		1.6	$ 2.7	5.7	$ 9.6
Compensation cost not yet recognized		$ 35.4		$ 35.4
Number of unvested phantom units (in shares) | shares		1,300,000		1,300,000
Period for recognition of unrecognized compensation cost				1 year 10 months 24 days
Phantom units | Investor Incentive Units
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Units received upon vesting (in shares) | shares				1
President and Chief Executive Officer | Direct Equity Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Award vesting period	5 years
Award Based On Service Period | President and Chief Executive Officer | Direct Equity Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting percentage	50.00%
Award Based On Service Period And Achievement Of Certain Performance Based Thresholds | President and Chief Executive Officer | Direct Equity Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting percentage	50.00%