Income Taxes Income Taxes - Summary of Net Operating Loss and Tax Credits Carryforwards (Details) - USD ($) $ in Millions		Feb. 28, 2022	Feb. 28, 2021
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		$ 1,707
Research and development tax credit	[1]	466
Minimum Taxes		207	$ 206
Tax Year 2029
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		10
Research and development tax credit	[1]	0
Minimum Taxes		1
Tax Year 2030
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		0
Research and development tax credit	[1]	0
Minimum Taxes		109
Tax Year 2031
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		1
Research and development tax credit	[1]	12
Minimum Taxes		72
Tax Year 2032
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		28
Research and development tax credit	[1]	1
Minimum Taxes		22
Tax Year 2033
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		88
Research and development tax credit	[1]	133
Minimum Taxes		0
Tax Year 2034
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		96
Research and development tax credit	[1]	124
Minimum Taxes		0
Tax Year 2035
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		92
Research and development tax credit	[1]	52
Minimum Taxes		3
Tax Year 2036
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		355
Research and development tax credit	[1]	40
Minimum Taxes		0
Tax Year 2037
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		492
Research and development tax credit	[1]	23
Minimum Taxes		0
Tax Year 2038
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		199
Research and development tax credit	[1]	17
Minimum Taxes		0
Tax Year 2039 [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		13
Research and development tax credit	[1]	14
Minimum Taxes		0
Tax Year 2040
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		0
Research and development tax credit	[1]	13
Minimum Taxes		0
Tax Year 2041
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		0
Research and development tax credit	[1]	8
Minimum Taxes		0
Tax Year 2042
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		12
Research and development tax credit	[1]	8
Minimum Taxes		0
Tax Year, Indefinite
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		321
Research and development tax credit	[1]	21
Minimum Taxes		$ 0

[1] Includes federal, provincial and state balances.