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Financial Instruments - Schedule of Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Apr. 30, 2024 | Jan. 31, 2024
--- | --- | ---
Cash equivalents: |  |
Amortized Cost | $ 1,681 | $ 1,892
Long-term |  |
Total, amortized cost | 1,619 | 1,797
Total, Gross unrealized gains | 13 | 13
Total, Gross unrealized losses | (4) | (1)
Total, fair value | 1,628 | 1,809
Commercial paper |  |
Short-term |  |
Amortized Cost | 141 | 159
Fair Value | 141 | 159
Corporate debt securities |  |
Cash equivalents: |  |
Fair Value | 10 |
Short-term |  |
Amortized Cost | 73 | 75
Fair Value | 73 | 75
Long-term |  |
Amortized Cost | 108 | 103
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (1) | 0
Fair Value | 107 | 104
U.S. government securities |  |
Cash equivalents: |  |
Fair Value | 12 |
Short-term |  |
Amortized Cost | 54 | 70
Fair Value | 54 | 70
Long-term |  |
Amortized Cost | 25 | 24
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1) | 0
Fair Value | 24 | 24
Asset-backed securities |  |
Short-term |  |
Amortized Cost | 25 | 28
Fair Value | 25 | 28
Long-term |  |
Amortized Cost | 62 | 59
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 62 | 59
Other |  |
Short-term |  |
Amortized Cost | 15 | 22
Fair Value | 15 | 22
Long-term |  |
Amortized Cost | 7 | 11
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 7 | 11
Agency mortgage backed securities |  |
Long-term |  |
Amortized Cost | 39 | 36
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1) | 0
Fair Value | 38 | 36
Mutual funds |  |
Long-term |  |
Other investments | 95 | 89
Other investments, gross unrealized gains | 13 | 12
Other investments, gross unrealized losses | (1) | (1)
Other investments, fair value | 107 | 100
Money market funds |  |
Cash equivalents: |  |
Amortized Cost | 592 | 693
Fair Value | 592 | 693
Commercial paper |  |
Cash equivalents: |  |
Amortized Cost | 278 | 250
Fair Value | 278 | 250
Certificates of deposit |  |
Cash equivalents: |  |
Amortized Cost | 83 | 80
Fair Value | 83 | 80
Other |  |
Cash equivalents: |  |
Amortized Cost |  | 6
Fair Value |  | 6
U.S. government securities |  |
Cash equivalents: |  |
Amortized Cost | 12 | 92
Fair Value | 12 | $ 92
Corporate debt securities |  |
Cash equivalents: |  |
Amortized Cost | 10 |
Fair Value | $ 10 |

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