| Investments, All Other Investments [Abstract] | Period [Axis] |
|---|
2016-02-01 - 2017-01-31 |
|---|
Investments, All Other Investments [Abstract] | |
Cost and Fair Value of Financial Instruments Disclosure | The following tables summarize the Company's financial instruments' amortized cost, gross unrealized gains, gross unrealized losses, and fair value by significant investment category as of January 31, 2017 and 2016. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | January 31, 2017 | | | | Amortized Cost | | Gross unrealized gains | | Gross unrealized losses | | Fair Value | | Level 1 | | Level 2 | | Level 3 | Cash equivalents (1): | | | | | | | | | | | | | | | Agency bonds | $ | 6.0 |
| | $ | — |
| | $ | — |
| | $ | 6.0 |
| | $ | 6.0 |
| | $ | — |
| | $ | — |
| | Certificates of deposit | 63.1 |
| | — |
| | — |
| | 63.1 |
| | 63.1 |
| | — |
| | — |
| | Commercial paper | 207.4 |
| | — |
| | — |
| | 207.4 |
| | — |
| | 207.4 |
| | — |
| | Corporate debt securities | 40.2 |
| | — |
| | — |
| | 40.2 |
| | 40.2 |
| | — |
| | — |
| | Custody cash deposit | 3.2 |
| | — |
| | — |
| | 3.2 |
| | 3.2 |
| | — |
| | — |
| | Money market funds | 256.5 |
| | — |
| | — |
| | 256.5 |
| | — |
| | 256.5 |
| | — |
| | Municipal bonds | 5.0 |
| | — |
| | — |
| | 5.0 |
| | 5.0 |
| | — |
| | — |
| | Sovereign debt | 15.0 |
| | — |
| | — |
| | 15.0 |
| | — |
| | 15.0 |
| | — |
| | U.S. government securities | 309.5 |
| | — |
| | — |
| | 309.5 |
| | 309.5 |
| | — |
| | — |
| Marketable securities: | | | | | | | | | | | | | | | Short-term available-for-sale | | | | | | | | | | | | | | | | Agency bonds | 13.2 |
| | — |
| |
| | 13.2 |
| | 13.2 |
| | — |
| | — |
| | | Asset backed securities | 19.6 |
| | — |
| | — |
| | 19.6 |
| | — |
| | 19.6 |
| | — |
| | | Certificates of deposit | 157.3 |
| | — |
| | — |
| | 157.3 |
| | 157.3 |
| | — |
| | — |
| | | Commercial paper | 109.2 |
| | — |
| | — |
| | 109.2 |
| | — |
| | 109.2 |
| | — |
| | | Corporate bonds | 234.7 |
| | — |
| | (0.2 | ) | | 234.5 |
| | 234.5 |
| | — |
| | — |
| | | Municipal bonds | 43.4 |
| | — |
| | — |
| | 43.4 |
| | 43.4 |
| | — |
| | — |
| | | Sovereign debt | 30.0 |
| | — |
| | — |
| | 30.0 |
| | — |
| | 30.0 |
| | — |
| | | U.S. government securities | 32.3 |
| | — |
| | — |
| | 32.3 |
| | 32.3 |
| | — |
| | — |
| | Short-term trading securities | | | | | | | | | | | | | | | | Mutual funds | 44.8 |
| | 2.5 |
| | — |
| | 47.3 |
| | 47.3 |
| | — |
| | — |
| | Long-term available-for-sale | | | | | | | | | | | | | | | | Agency bonds | 7.1 |
| | — |
| | — |
| | 7.1 |
| | 7.1 |
| | — |
| | — |
| | | Asset backed securities | 65.8 |
| | 0.1 |
| | — |
| | 65.9 |
| | — |
| | 65.9 |
| | — |
| | | Corporate bonds | 172.1 |
| | 0.1 |
| | (0.1 | ) | | 172.1 |
| | 172.1 |
| | — |
| | — |
| | | Municipal bonds | 10.7 |
| | — |
| | — |
| | 10.7 |
| | 10.7 |
| | — |
| | — |
| | | Sovereign debt | 1.5 |
| | — |
| | — |
| | 1.5 |
| | — |
| | 1.5 |
| | — |
| | | U.S. government securities | 48.8 |
| | 0.1 |
| | — |
| | 48.9 |
| | 48.9 |
| | — |
| | — |
| Convertible debt securities (2) | 4.9 |
| | 2.3 |
| | (1.6 | ) | | 5.6 |
| | — |
| | — |
| | 5.6 |
| Derivative contracts (3) | 2.2 |
| | 12.3 |
| | (11.7 | ) | | 2.8 |
| | — |
| | 1.5 |
| | 1.3 |
| | | Total | $ | 1,903.5 |
| | $ | 17.4 |
| | $ | (13.6 | ) | | $ | 1,907.3 |
| | $ | 1,193.8 |
| | $ | 706.6 |
| | $ | 6.9 |
|
____________________ | | (1) | Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets. |
| | (2) | Considered "available for sale" and included in "Other assets" in the accompanying Consolidated Balance Sheets. |
| | (3) | Included in “Prepaid expenses and other current assets,” "Other assets," or “Other accrued liabilities” in the accompanying Consolidated Balance Sheets. |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | January 31, 2016 | | | | Amortized Cost | | Gross unrealized gains | | Gross unrealized losses | | Fair Value | | Level 1 | | Level 2 | | Level 3 | Cash equivalents (1): | | | | | | | | | | | | | | | Agency bonds | $ | 8.5 |
| | $ | — |
| | $ | — |
| | $ | 8.5 |
| | $ | 8.5 |
| | $ | — |
| | $ | — |
| | Certificates of deposit | 267.6 |
| | — |
| | — |
| | 267.6 |
| | 267.6 |
| | — |
| | — |
| | Commercial paper | 106.6 |
| | — |
| | — |
| | 106.6 |
| | — |
| | 106.6 |
| | — |
| | Custody cash deposit | 2.1 |
| | — |
| | — |
| | 2.1 |
| | 2.1 |
| | — |
| | — |
| | Money market funds | 382.4 |
| | — |
| | — |
| | 382.4 |
| | — |
| | 382.4 |
| | — |
| | Municipal bonds | 5.0 |
| | — |
| | — |
| | 5.0 |
| | 5.0 |
| | — |
| | — |
| | U.S. government securities | 103.0 |
| | — |
| | — |
| | 103.0 |
| | 103.0 |
| | — |
| | — |
| Marketable securities: | | | | | | | | | | | | | | | Short-term available-for-sale | | | | | | | | | | | | | | | | Agency bonds | 40.0 |
| | — |
| | (0.1 | ) | | 39.9 |
| | 39.9 |
| | — |
| | — |
| | | Asset backed securities | 7.3 |
| | — |
| | — |
| | 7.3 |
| | — |
| | 7.3 |
| | — |
| | | Certificates of deposit | 190.3 |
| | — |
| | — |
| | 190.3 |
| | 190.3 |
| | — |
| | — |
| | | Commercial paper | 141.1 |
| | — |
| | — |
| | 141.1 |
| | — |
| | 141.1 |
| | — |
| | | Corporate debt securities | 377.1 |
| | 0.1 |
| | (0.3 | ) | | 376.9 |
| | 376.9 |
| | — |
| | — |
| | | Municipal bonds | 9.7 |
| | — |
| | — |
| | 9.7 |
| | 9.7 |
| | — |
| | — |
| | | Sovereign debt | 20.1 |
| | — |
| | — |
| | 20.1 |
| | — |
| | 20.1 |
| | — |
| | | U.S. government securities | 74.6 |
| | — |
| | — |
| | 74.6 |
| | 74.6 |
| | — |
| | — |
| | Short-term trading securities | | | | | | | | | | | | | | | | Mutual funds | 38.8 |
| | 0.4 |
| | (1.2 | ) | | 38.0 |
| | 38.0 |
| | — |
| | — |
| | Long-term available-for-sale | | | | | | | | | | | | | | | | Agency bonds | 56.8 |
| | 0.1 |
| | — |
| | 56.9 |
| | 56.9 |
| | — |
| | — |
| | | Asset backed securities | 36.5 |
| | 0.1 |
| | — |
| | 36.6 |
| | — |
| | 36.6 |
| | — |
| | | Corporate debt securities | 320.9 |
| | 0.3 |
| | (0.8 | ) | | 320.4 |
| | 320.4 |
| | — |
| | — |
| | | Municipal bonds | 2.9 |
| | — |
| | — |
| | 2.9 |
| | 2.9 |
| | — |
| | — |
| | | Sovereign debt | 16.9 |
| | — |
| | — |
| | 16.9 |
| | — |
| | 16.9 |
| | — |
| | | U.S. government securities | 98.4 |
| | 0.3 |
| | (0.1 | ) | | 98.6 |
| | 98.6 |
| | — |
| | — |
| Convertible debt securities (2) | 2.5 |
| | 2.0 |
| | (1.1 | ) | | 3.4 |
| | — |
| | — |
| | 3.4 |
| Derivative contracts (3) | 1.5 |
| | 7.8 |
| | (7.4 | ) | | 1.9 |
| | — |
| | 1.6 |
| | 0.3 |
| | | Total | $ | 2,310.6 |
| | $ | 11.1 |
| | $ | (11.0 | ) | | $ | 2,310.7 |
| | $ | 1,594.4 |
| | $ | 712.6 |
| | $ | 3.7 |
|
____________________ | | (1) | Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets. |
| | (2) | Considered "available for sale" securities and included in "Other assets" in the accompanying Consolidated Balance Sheets. |
| | (3) | Included in “Prepaid expenses and other current assets,” "Other assets," or “Other accrued liabilities” in the accompanying Consolidated Balance Sheets. |
|
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation | A reconciliation of the change in Autodesk’s Level 3 items for the fiscal year ended January 31, 2017 was as follows: | | | | | | | | | | | | | | | Fair Value Measurements Using Significant Unobservable Inputs | | (Level 3) | | | Derivative Contracts | | Convertible Debt Securities | | Total | Balances, January 31, 2016 | | $ | 0.3 |
| | $ | 3.4 |
| | $ | 3.7 |
| Purchases | | 1.1 |
| | 4.0 |
| | 5.1 |
| Settlements | | (0.7 | ) | | (1.7 | ) | | (2.4 | ) | Gains (losses) included in earnings | | 0.6 |
| | 0.1 |
| | 0.7 |
| Gains included in OCI | | — |
| | (0.2 | ) | | (0.2 | ) | Balances, January 31, 2017 | | $ | 1.3 |
| | $ | 5.6 |
| | $ | 6.9 |
|
|
Available-for-sale Securities | The following table summarizes the estimated fair value of Autodesk's “available-for-sale securities” classified by the contractual maturity date of the security: | | | | | | | | | | January 31, 2017 | | Cost | | Fair Value | Due within in 1 year | $ | 635.6 |
| | $ | 635.9 |
| Due in 1 year through 5 years | 305.4 |
| | 305.8 |
| Due in 5 years through 10 years | 2.6 |
| | 2.6 |
| Due after 10 years | 7.0 |
| | 7.0 |
| Total | $ | 950.6 |
| | $ | 951.3 |
|
|
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The fair value of derivative instruments in Autodesk’s Consolidated Balance Sheets were as follows as of January 31, 2017 and January 31, 2016: | | | | | | | | | | | | Balance Sheet Location | | Fair Value at | | January 31, 2017 | | January 31, 2016 | Derivative Assets | | | | | | Foreign currency contracts designated as cash flow hedges | Prepaid expenses and other current assets | | $ | 10.1 |
| | $ | 3.4 |
| Derivatives not designated as hedging instruments | Prepaid expenses and other current assets and Other assets | | 3.2 |
| | 4.9 |
| Total derivative assets | | | $ | 13.3 |
| | $ | 8.3 |
| Derivative Liabilities | | | | | | Foreign currency contracts designated as cash flow hedges | Other accrued liabilities | | $ | 4.5 |
| | $ | 3.4 |
| Derivatives not designated as hedging instrument | Other accrued liabilities | | 6.0 |
| | 3.0 |
| Total derivative liabilities | | | $ | 10.5 |
| | $ | 6.4 |
|
|
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance | The effects of derivatives designated as hedging instruments on Autodesk’s Consolidated Statements of Operations were as follows for the fiscal years ended January 31, 2017, 2016, and 2015, respectively (amounts presented include any income tax effects): | | | | | | | | | | | | | | Foreign Currency Contracts | | Fiscal Year Ended January 31, | | 2017 | | 2016 | | 2015 | Amount of gain recognized in accumulated other comprehensive income on derivatives (effective portion) | $ | 6.3 |
| | $ | 2.2 |
| | $ | 46.4 |
| Amount and location of gain reclassified from accumulated other comprehensive income into income (effective portion) | | | | | | Net revenue | $ | 9.2 |
| | $ | 39.8 |
| | $ | 10.5 |
| Operating expenses | (1.8 | ) | | (10.5 | ) | | (3.5 | ) | Total | $ | 7.4 |
| | $ | 29.3 |
| | $ | 7.0 |
| Amount and location of (loss) gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) | | | | | | Interest and other expense, net | $ | (0.3 | ) | | $ | (0.7 | ) | | $ | 0.9 |
|
The effects of derivatives not designated as hedging instruments on Autodesk’s Consolidated Statements of Operations were as follows for the fiscal years ended January 31, 2017, 2016, and 2015, respectively (amounts presented include any income tax effects): | | | | | | | | | | | | | | Fiscal Year Ended January 31, | | 2017 | | 2016 | | 2015 | Amount and location of (loss) gain recognized in income on derivatives | | | | | | Interest and other expense, net | $ | (11.1 | ) | | $ | (1.7 | ) | | $ | (25.5 | ) |
|