Commitments and Contingent Liabilities (Details 2)	12 Months Ended
	Feb. 29, 2020 USD ($)
Loss Contingencies [Line Items]
Proceeds received	$ 26,500
Deferred costs	6,800
Net benefit	19,700
November 2020
Loss Contingencies [Line Items]
Proceeds received	10,700
Deferred costs	3,300
Net benefit	7,400
May 2023
Loss Contingencies [Line Items]
Proceeds received	6,000.0
Deferred costs	1,200
Net benefit	4,800
July 2025
Loss Contingencies [Line Items]
Proceeds received	6,600
Deferred costs	1,300
Net benefit	5,300
August 2025
Loss Contingencies [Line Items]
Proceeds received	3,200
Deferred costs	1,000.0
Net benefit	$ 2,200