XML 57 R41.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Financial Instruments Cost and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Jul. 31, 2016 | Jan. 31, 2016 | Jul. 31, 2015 | Jan. 31, 2015
--- | --- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | $ 1,467.3 |  | $ 1,353.0 |  | $ 1,473.1 | $ 1,410.6
Derivative contracts, Amortized Cost | [1] | 3.2 |  | 1.5 |  |  |
Derivative contracts, Gross unrealized gains | [1] | 7.1 |  | 7.8 |  |  |
Derivative contracts, Gross unrealized losses | [1] | (10.8) |  | (7.4) |  |  |
Derivative contracts, Fair Value | [1] | (0.5) |  | 1.9 |  |  |
Amortized Cost |  | 1,977.8 |  | 2,310.6 |  |  |
Gross unrealized gains |  | 13.8 |  | 11.1 |  |  |
Gross unrealized losses |  | (12.1) |  | (11.0) |  |  |
Fair Value |  | 1,979.5 |  | 2,310.7 |  |  |
Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Amortized Cost |  | 43.7 |  | 38.8 |  |  |
Mutual funds, Gross unrealized gains |  | 1.9 |  | 0.4 |  |  |
Mutual funds, Gross unrealized losses |  | 0.0 |  | (1.2) |  |  |
Mutual funds, Fair Value |  | 45.6 |  | 38.0 |  |  |
Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 41.9 |  | 40.0 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | (0.1) |  |  |
Marketable securities, Fair Value |  | 41.9 |  | 39.9 |  |  |
Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 10.8 |  | 7.3 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 10.8 |  | 7.3 |  |  |
Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 55.4 |  | 190.3 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 55.4 |  | 190.3 |  |  |
Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 119.4 |  | 141.1 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 119.4 |  | 141.1 |  |  |
Marketable Securities, Current | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 267.2 |  |  |  |  |
Marketable securities, Gross unrealized gains |  | 0.2 |  |  |  |  |
Marketable securities, Gross unrealized losses |  | (0.1) |  |  |  |  |
Marketable securities, Fair Value |  | 267.3 |  |  |  |  |
Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  |  |  | 377.1 |  |  |
Marketable securities, Gross unrealized gains |  |  |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  |  |  | (0.3) |  |  |
Marketable securities, Fair Value |  |  |  | 376.9 |  |  |
Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  |  |  | 9.7 |  |  |
Marketable securities, Gross unrealized gains |  |  |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  |  |  | 0.0 |  |  |
Marketable securities, Fair Value |  |  |  | 9.7 |  |  |
Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 19.6 |  | 20.1 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 19.6 |  | 20.1 |  |  |
Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 37.6 |  | 74.6 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 37.6 |  | 74.6 |  |  |
Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 52.0 |  | 56.8 |  |  |
Marketable securities, Gross unrealized gains |  | 0.3 |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 52.3 |  | 56.9 |  |  |
Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 58.9 |  | 36.5 |  |  |
Marketable securities, Gross unrealized gains |  | 0.2 |  | 0.1 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 59.1 |  | 36.6 |  |  |
Marketable Securities, Noncurrent | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 1.8 |  |  |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  |  |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  |  |  |  |
Marketable securities, Fair Value |  | 1.8 |  |  |  |  |
Marketable Securities, Noncurrent | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 276.1 |  |  |  |  |
Marketable securities, Gross unrealized gains |  | 1.5 |  |  |  |  |
Marketable securities, Gross unrealized losses |  | (0.1) |  |  |  |  |
Marketable securities, Fair Value |  | 277.5 |  |  |  |  |
Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  |  |  | 320.9 |  |  |
Marketable securities, Gross unrealized gains |  |  |  | 0.3 |  |  |
Marketable securities, Gross unrealized losses |  |  |  | (0.8) |  |  |
Marketable securities, Fair Value |  |  |  | 320.4 |  |  |
Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 9.5 |  | 2.9 |  |  |
Marketable securities, Gross unrealized gains |  | 0.1 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 9.6 |  | 2.9 |  |  |
Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 10.8 |  | 16.9 |  |  |
Marketable securities, Gross unrealized gains |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | 0.0 |  |  |
Marketable securities, Fair Value |  | 10.8 |  | 16.9 |  |  |
Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Amortized Cost |  | 94.2 |  | 98.4 |  |  |
Marketable securities, Gross unrealized gains |  | 0.3 |  | 0.3 |  |  |
Marketable securities, Gross unrealized losses |  | 0.0 |  | (0.1) |  |  |
Marketable securities, Fair Value |  | 94.5 |  | 98.6 |  |  |
Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Amortized Cost | [2] | 6.3 |  | 2.5 |  |  |
Convertible debt securities, Gross unrealized gains | [2] | 2.2 |  | 2.0 |  |  |
Convertible debt securities, Gross unrealized losses | [2] | (1.1) |  | (1.1) |  |  |
Convertible debt securities, Fair Value | [2] | 7.4 |  | 3.4 |  |  |
Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 44.2 | [3] | 8.5 | [4] |  |
Cash equivalents, Fair Value |  | 44.2 | [3] | 8.5 | [4] |  |
Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 181.3 | [3] | 267.6 | [4] |  |
Cash equivalents, Fair Value |  | 181.3 | [3] | 267.6 | [4] |  |
Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 296.9 | [3] | 106.6 | [4] |  |
Cash equivalents, Fair Value |  | 296.9 | [3] | 106.6 | [4] |  |
Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents | [3] | 8.7 |  |  |  |  |
Cash equivalents, Fair Value | [3] | 8.7 |  |  |  |  |
Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 22.5 | [3] | 2.1 | [4] |  |
Cash equivalents, Fair Value |  | 22.5 | [3] | 2.1 | [4] |  |
Money market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 143.8 | [3] | 382.4 | [4] |  |
Cash equivalents, Fair Value |  | 143.8 | [3] | 382.4 | [4] |  |
Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 5.0 | [3] | 5.0 | [4] |  |
Cash equivalents, Fair Value |  | 5.0 | [3] | 5.0 | [4] |  |
U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents |  | 167.0 | [3] | 103.0 | [4] |  |
Cash equivalents, Fair Value |  | 167.0 | [3] | 103.0 | [4] |  |
Level 1 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value | [1] | 0.0 |  | 0.0 |  |  |
Fair Value |  | 1,312.2 |  | 1,594.4 |  |  |
Level 1 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 45.6 |  | 38.0 |  |  |
Level 1 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 41.9 |  | 39.9 |  |  |
Level 1 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 55.4 |  | 190.3 |  |  |
Level 1 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 267.3 |  |  |  |  |
Level 1 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 376.9 |  |  |
Level 1 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 9.7 |  |  |
Level 1 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 37.6 |  | 74.6 |  |  |
Level 1 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 52.3 |  | 56.9 |  |  |
Level 1 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Noncurrent | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 1.8 |  |  |  |  |
Level 1 | Marketable Securities, Noncurrent | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 277.5 |  |  |  |  |
Level 1 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 320.4 |  |  |
Level 1 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 9.6 |  | 2.9 |  |  |
Level 1 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 1 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 94.5 |  | 98.6 |  |  |
Level 1 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value | [2] | 0.0 |  | 0.0 |  |  |
Level 1 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 44.2 | [3] | 8.5 | [4] |  |
Level 1 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 181.3 | [3] | 267.6 | [4] |  |
Level 1 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 1 | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [3] | 8.7 |  |  |  |  |
Level 1 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 22.5 | [3] | 2.1 | [4] |  |
Level 1 | Money market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 1 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 5.0 | [3] | 5.0 | [4] |  |
Level 1 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 167.0 | [3] | 103.0 | [4] |  |
Level 2 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value | [1] | (1.7) |  | 1.6 |  |  |
Fair Value |  | 658.7 |  | 712.6 |  |  |
Level 2 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 10.8 |  | 7.3 |  |  |
Level 2 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 119.4 |  | 141.1 |  |  |
Level 2 | Marketable Securities, Current | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 2 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 2 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 19.6 |  | 20.1 |  |  |
Level 2 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 59.1 |  | 36.6 |  |  |
Level 2 | Marketable Securities, Noncurrent | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 2 | Marketable Securities, Noncurrent | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 2 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 10.8 |  | 16.9 |  |  |
Level 2 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 2 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value | [2] | 0.0 |  | 0.0 |  |  |
Level 2 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 2 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 2 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 296.9 | [3] | 106.6 | [4] |  |
Level 2 | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [3] | 0.0 |  |  |  |  |
Level 2 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 2 | Money market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 143.8 | [3] | 382.4 | [4] |  |
Level 2 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 2 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Derivative contracts, Fair Value | [1] | 1.2 |  | 0.3 |  |  |
Fair Value |  | 8.6 |  | 3.7 |  |  |
Level 3 | Marketable Securities, Current |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Mutual funds, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 3 | Marketable Securities, Current | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 3 | Marketable Securities, Current | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 3 | Marketable Securities, Current | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Asset backed securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 3 | Marketable Securities, Noncurrent | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  |  |  |  |
Level 3 | Marketable Securities, Noncurrent | Corporate debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  |  |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | Sovereign debt |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Marketable Securities, Noncurrent | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Marketable securities, Fair Value |  | 0.0 |  | 0.0 |  |  |
Level 3 | Convertible debt securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Convertible debt securities, Fair Value | [2] | 7.4 |  | 3.4 |  |  |
Level 3 | Agency bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | Certificates of deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | Commercial paper |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | Corporate bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value | [3] | 0.0 |  |  |  |  |
Level 3 | Custody cash deposit |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | Money market funds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | Municipal bonds |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | 0.0 | [3] | 0.0 | [4] |  |
Level 3 | U.S. government securities |  |  |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |  |  |
Cash equivalents, Fair Value |  | $ 0.0 | [3] | $ 0.0 | [4] |  |
[1] | Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.
[2] | Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.
[3] | Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.
[4] | Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.

X
- Definition Amortized Cost Securities + References No definition available. + Details
Name: | adsk_AmortizedCostSecurities
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Convertible Debt Securities, Amortized Cost + References No definition available. + Details
Name: | adsk_ConvertibleDebtSecuritiesAmortizedCost
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Convertible Debt Securities, Fair Value Disclosure + References No definition available. + Details
Name: | adsk_ConvertibleDebtSecuritiesFairValueDisclosure
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Convertible Debt Securities, Unrealized Gains + References No definition available. + Details
Name: | adsk_ConvertibleDebtSecuritiesUnrealizedGains
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Convertible Debt Securities, Unrealized Losses + References No definition available. + Details
Name: | adsk_ConvertibleDebtSecuritiesUnrealizedLosses
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative Assets, Accumulated Gross Unrealized Gain, before Tax + References No definition available. + Details
Name: | adsk_DerivativeAssetsAccumulatedGrossUnrealizedGainbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Derivative Assets, Accumulated Gross Unrealized Loss, before Tax + References No definition available. + Details
Name: | adsk_DerivativeAssetsAccumulatedGrossUnrealizedLossbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative Contracts, Fair Value Disclosure + References No definition available. + Details
Name: | adsk_DerivativeContractsFairValueDisclosure
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative Instruments And Hedges, Net + References No definition available. + Details
Name: | adsk_DerivativeInstrumentsAndHedgesNet
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair Value, Assets Measured on Recurring Basis + References No definition available. + Details
Name: | adsk_FairValueAssetsMeasuredOnRecurringBasis
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investments, Accumulated Gross Unrealized Gain, before Tax + References No definition available. + Details
Name: | adsk_InvestmentsAccumulatedGrossUnrealizedGainbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Investments, Accumulated Gross Unrealized Loss, before Tax + References No definition available. + Details
Name: | adsk_InvestmentsAccumulatedGrossUnrealizedLossbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Trading Securities, Accumulated Gross Unrealized Gain, before Tax + References No definition available. + Details
Name: | adsk_TradingSecuritiesAccumulatedGrossUnrealizedGainbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Trading Securities, Accumulated Gross Unrealized Loss, before Tax + References No definition available. + Details
Name: | adsk_TradingSecuritiesAccumulatedGrossUnrealizedLossbeforeTax
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 + Details
Name: | us-gaap_TradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References No definition available. + Details
Name: | us-gaap_TradingSecuritiesCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=adsk_MarketableSecuritiesCurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=adsk_AgencyBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_SovereignDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=adsk_MarketableSecuritiesNoncurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=adsk_AgencyBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_DepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |