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Fair Value Measurements (Tables)
 3 Months Ended
Apr. 30, 2023
Fair Value Disclosures [Abstract]  
Fair value of investments The fair value of these investments is as follows:
(Amounts in millions)Fair Value as of April 30, 2023Fair Value as of January 31, 2023
Equity investments measured using Level 1 inputs$3,433 $5,099 
Equity investments measured using Level 2 inputs4,082 5,570 
Total$7,515 $10,669 
Schedule of derivative instruments As of April 30, 2023 and January 31, 2023, the notional amounts and fair values of these derivatives were as follows:
 April 30, 2023January 31, 2023
(Amounts in millions)Notional AmountFair ValueNotional AmountFair Value
Receive fixed-rate, pay variable-rate interest rate swaps designated as fair value hedges$6,271 $(669)
(1)
$8,021 $(689)
(1)
Receive fixed-rate, pay fixed-rate cross-currency swaps designated as cash flow hedges5,920 (1,522)
(1)
5,900 (1,423)
(1)
Total$12,191 $(2,191)$13,921 $(2,112)
(1)Classified primarily in deferred income taxes and other within the Company's Condensed Consolidated Balance Sheets.
Carrying value and fair value of long-term debt The carrying value and fair value of the Company's long-term debt as of April 30, 2023 and January 31, 2023, are as follows: 
 April 30, 2023January 31, 2023
(Amounts in millions)Carrying ValueFair ValueCarrying ValueFair Value
Long-term debt, including amounts due within one year$42,095 $41,296 $38,840 $38,169