OTHER COMPREHENSIVE INCOME OR LOSS - Changes in the AOCI Balance (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2019	Dec. 01, 2018	Nov. 30, 2019	Dec. 01, 2018	Feb. 24, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,345.5	$ 1,362.6	$ 1,450.7	$ 1,398.2
Cumulative effect of accounting change					$ 574.6
Other comprehensive (loss) income before reclassifications			(31.8)	3.8
Amounts reclassified from accumulated other comprehensive income			1.5	(2.5)
Tax (expense) benefit			8.0	(0.3)
Other comprehensive income (loss)	5.5	(0.1)	(5.7)	1.0
Ending balance	2,410.6	1,390.1	2,410.6	1,390.1
Accumulated other comprehensive income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	80.1	192.2	91.3	191.1
Cumulative effect of accounting change					16.6
Ending balance	85.6	192.1	85.6	192.1
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			3.4	18.9
Other comprehensive (loss) income before reclassifications			(44.9)	5.5
Amounts reclassified from accumulated other comprehensive income			(1.7)	0.4
Tax (expense) benefit			12.1	(1.6)
Other comprehensive income (loss)			(33.3)	4.3
Ending balance	(29.9)	23.2	(29.9)	23.2
Pension and Post-retirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			88.8	171.9
Other comprehensive (loss) income before reclassifications			10.1	0.0
Amounts reclassified from accumulated other comprehensive income			3.2	(2.2)
Tax (expense) benefit			(3.4)	0.6
Other comprehensive income (loss)			24.8	(1.6)
Ending balance	113.6	170.3	113.6	170.3
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(0.9)	0.3
Other comprehensive (loss) income before reclassifications			3.0	(1.7)
Amounts reclassified from accumulated other comprehensive income			0.0	(0.7)
Tax (expense) benefit			(0.7)	0.7
Other comprehensive income (loss)			2.8	(1.7)
Ending balance	$ 1.9	$ (1.4)	$ 1.9	$ (1.4)
ASU 2018-02
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of accounting change					16.6
ASU 2018-02 | Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of accounting change					1.2
ASU 2018-02 | Pension and Post-retirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of accounting change					14.9
ASU 2018-02 | Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of accounting change					$ 0.5