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Selected Quarterly Financial Information (Unaudited) (Tables) | 12 Months Ended
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Jan. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information | Summarized quarterly financial information for fiscal 2018 and 2017 is as follows:
2018 | 1st quarter |  | 2nd quarter |  | 3rd quarter |  | 4th quarter |  | Fiscal year
Net revenue | $ | 485.7 |  |  | $ | 501.8 |  |  | $ | 515.3 |  |  | $ | 553.8 |  |  | $ | 2,056.6 |
Gross profit | 407.5 |  |  | 427.2 |  |  | 437.8 |  |  | 480.7 |  |  | 1,753.2 |
Loss from operations | (119.6 | ) |  | (107.6 | ) |  | (100.0 | ) |  | (181.9 | ) |  | (509.1 | )
Provision for income taxes | (8.2 | ) |  | (17.6 | ) |  | (8.6 | ) |  | 24.8 |  |  | (9.6 | )
Net loss | (129.6 | ) |  | (144.0 | ) |  | (119.8 | ) |  | (173.5 | ) |  | (566.9 | )
Basic net loss per share | $ | (0.59 | ) |  | $ | (0.66 | ) |  | $ | (0.55 | ) |  | $ | (0.79 | ) |  | $ | (2.58 | )
Diluted net loss per share | $ | (0.59 | ) |  | $ | (0.66 | ) |  | $ | (0.55 | ) |  | $ | (0.79 | ) |  | $ | (2.58 | )
Loss from operations includes the following items: |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ | 59.0 |  |  | $ | 58.8 |  |  | $ | 65.1 |  |  | $ | 62.1 |  |  | $ | 245.0 |
Amortization of acquisition related intangibles | 10.4 |  |  | 8.9 |  |  | 8.7 |  |  | 8.6 |  |  | 36.6 |
CEO transition costs | 11.0 |  |  | 10.6 |  |  | — |  |  | (0.2 | ) |  | 21.4 |
Restructuring charges and other facility exit costs, net | (0.3 | ) |  | 0.5 |  |  | — |  |  | 93.9 |  |  | 94.1 |
2017 | 1st quarter |  | 2nd quarter |  | 3rd quarter |  | 4th quarter |  | Fiscal year
Net revenue | $ | 511.9 |  |  | $ | 550.7 |  |  | $ | 489.6 |  |  | $ | 478.8 |  |  | $ | 2,031.0 |
Gross profit | 419.5 |  |  | 465.6 |  |  | 408.1 |  |  | 395.9 |  |  | 1,689.1 |
Loss from operations | (149.7 | ) |  | (62.9 | ) |  | (119.9 | ) |  | (167.1 | ) |  | (499.6 | )
Provision for income taxes | (14.4 | ) |  | (25.2 | ) |  | (13.5 | ) |  | (5.2 | ) |  | (58.3 | )
Net loss | (167.7 | ) |  | (98.2 | ) |  | (142.8 | ) |  | (173.4 | ) |  | (582.1 | )
Basic net loss per share | $ | (0.75 | ) |  | $ | (0.44 | ) |  | $ | (0.64 | ) |  | $ | (0.78 | ) |  | $ | (2.61 | )
Diluted net loss per share | $ | (0.75 | ) |  | $ | (0.44 | ) |  | $ | (0.64 | ) |  | $ | (0.78 | ) |  | $ | (2.61 | )
Loss from operations includes the following items: |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ | 51.6 |  |  | $ | 54.3 |  |  | $ | 56.6 |  |  | $ | 59.3 |  |  | $ | 221.8 |
Amortization of acquisition related intangibles | 18.8 |  |  | 18.5 |  |  | 17.2 |  |  | 17.3 |  |  | 71.8 |
Restructuring charges, net | 52.3 |  |  | 16.0 |  |  | 3.2 |  |  | 9.0 |  |  | 80.5 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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