Debentures - Impact of Changes in Fair Value of Debentures (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Debt Instrument [Line Items]
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	$ 110	$ (95)	$ 47	$ (114)
1.75% Debenture
Debt Instrument [Line Items]
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	110	(89)	47	(89)
Income (charge) associated with the change in fair value from instrument-specific credit components recorded in AOCL	(1)	(5)	0	(5)
Debenture total fair value adjustment	109	(94)	47	(94)
3.75% Debenture
Debt Instrument [Line Items]
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations	0	0	0	(19)
Income (charge) associated with the change in fair value from instrument-specific credit components recorded in AOCL	0	0	0	15
Realized charges associated with the change in fair value from credit components recorded in the consolidated statement of operations on redemption	0	(6)	0	(6)
Realized charges associated with the change in fair value from credit components released from AOCL on redemption	0	6	0	6
Debenture total fair value adjustment	$ 0	$ 0	$ 0	$ (4)

Debenture total fair value adjustment

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- Definition

Realized charges associated with the change in fair value from credit components recorded in the consolidated statement of operations on redemption

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

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- Definition

Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) from increase (decrease) in instrument-specific credit risk, realized upon derecognition of financial liability measured under fair value option.

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Amount, before tax and reclassification adjustment, of unrealized gain (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option.

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