Short-term Borrowings and Long-term Debt (Schedule of Long-term Debt Instruments) (Details) $ in Millions	6 Months Ended
	Jul. 31, 2021 USD ($)
Long-term debt due within one year
Balances as of February 1, 2021	$ 3,115
Repayments of long-term debt	(3,010)
Reclassifications of long-term debt	1,511
Other	1
Balances as of July 31, 2021	1,617
Long-term debt
Balances as of February 1, 2021	41,194
Repayments of long-term debt	0
Reclassifications of long-term debt	(1,511)
Other	(102)
Balances as of July 31, 2021	39,581
Total
Balances as of February 1, 2021	44,309
Repayments of long-term debt	(3,010)
Reclassifications of long-term debt	0
Other	(101)
Balances as of July 31, 2021	$ 41,198