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Segments - Operations by geographic area (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | [2] | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  | $ 648.3 | [1] | $ 599.8 | $ 609.5 | $ 646.5 | $ 664.6 | $ 618.0 | $ 637.1 | $ 592.5 | $ 2,504.1 | $ 2,512.2 | $ 2,273.9
Total long-lived assets | [3] | 169.3 |  |  |  |  | 159.2 |  |  |  | 169.3 | 159.2 |
Americas |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 972.8 | 898.0 | 818.9
Total long-lived assets | [3] | 122.0 |  |  |  |  | 111.9 |  |  |  | 122.0 | 111.9 |
Americas | U.S. |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 803.9 | 736.4 | 672.3
Total long-lived assets | [3] | 118.8 |  |  |  |  | 108.8 |  |  |  | 118.8 | 108.8 |
Americas | Other Americas |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 168.9 | 161.6 | 146.6
Total long-lived assets | [3] | 3.2 |  |  |  |  | 3.1 |  |  |  | 3.2 | 3.1 |
Europe Middle East And Africa [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 934.6 | 980.0 | 851.8
Europe, Middle East, and Africa | Europe Middle East And Africa [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total long-lived assets | [3] | 25.7 |  |  |  |  | 25.0 |  |  |  | 25.7 | 25.0 |
Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 596.7 | 634.2 | 603.2
Total long-lived assets | [3] | $ 21.6 |  |  |  |  | $ 22.3 |  |  |  | 21.6 | 22.3 |
Asia Pacific | Japan |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | 219.7 | 269.0 | 274.5
Asia Pacific | Other Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  | $ 377.0 | $ 365.2 | $ 328.7
[1] | Subsequent to furnishing preliminary financial statements on Form 8-K on February 25, 2016 for the three and twelve months ended January 31, 2016, Autodesk identified a $4.5 million tax adjustment associated with deemed foreign withholding taxes related to non-permanently reinvested earnings in foreign jurisdictions which have not yet repatriated resulting in changes to the Consolidated Financial Statements as reflected in this Annual Report on Form 10-K. This non-cash adjustment resulted in an increase to GAAP diluted loss per share from $(0.15) to $(0.17) for the three months ended January 31, 2016.
[2] | Certain second quarter fiscal 2016 balances have been revised to include the correction of an error identified in the third quarter of fiscal 2016, resulting in an additional $33.1 million of income tax expense from the previously reported results, primarily related to the establishment of a valuation allowance. See Note 1, "Business and Summary of Significant Accounting Policies" for further discussion.
[3] | (1)Long-lived assets exclude deferred tax assets, marketable securities, goodwill, and other intangible assets.

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