Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 1,456	$ 1,913	$ 1,504	$ 2,529
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3)	2	(2)	3
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	7	1	14
Ending Balance	1,318	1,914	1,318	1,914
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	2	(2)	1	(1)
Other comprehensive income (loss) before reclassification	(2)	3	0	1
Amounts reclassified from AOCL into net loss	0	1	(1)	2
Ending Balance	0	2	0	2
Foreign Currency Cumulative Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(3)	(8)	(4)	(9)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3)	2	(2)	3
Ending Balance	(6)	(6)	(6)	(6)
Change in Fair Value From Instrument-Specific Credit Risk On Debentures
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(8)	(15)	(9)	(22)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	7	1	14
Ending Balance	(8)	(8)	(8)	(8)
Other Post-Employment Benefit Obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending Balance	(1)	(1)	(1)	(1)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending Balance	$ (15)	$ (13)	$ (15)	$ (13)