Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2020	May 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 2,529	$ 2,636
Other comprehensive income before reclassification	1
Change in cumulative comprehensive income (loss) for the period	7	(10)
Ending Balance	1,913	$ 2,597
Foreign Currency Cumulative Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(9)
Amounts reclassified from AOCL into net loss	0
Change in cumulative comprehensive income (loss) for the period	1
Ending Balance	(8)
Accumulated Net Unrealized Losses on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(1)
Amounts reclassified from AOCL into net loss	(2)
Change in cumulative comprehensive income (loss) for the period	(1)
Ending Balance	(2)
Other Post-Employment Benefit Obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(1)
Other comprehensive income before reclassification	0
Amounts reclassified from AOCL into net loss	0
Change in cumulative comprehensive income (loss) for the period	0
Ending Balance	(1)
Changes in fair value from instrument specific credit risk on Debentures
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(22)
Amounts reclassified from AOCL into net loss	0
Change in cumulative comprehensive income (loss) for the period	7
Ending Balance	(15)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(33)
Other comprehensive income before reclassification	9
Amounts reclassified from AOCL into net loss	(2)
Change in cumulative comprehensive income (loss) for the period	7
Ending Balance	$ (26)