| In millions, except per share items | Oct-29-16 | Oct-31-15 | Nov-01-14 | Oct-26-13 | Oct-27-12 | Oct-29-11 | Oct-30-10 | Oct-31-09 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities: | | | | | | | | |
| Net income (loss) | 213.9 | 340.4 | 238.0 | 208.6 | 195.2 | 50.6 | 116.5 | -83.2 |
| Adjustments to reconcile net income (loss) to net cash from operating activities: | | | | | | | | |
| Excess tax benefits from stock-based compensation | -9.6 | -48.9 | -64.6 | -3.2 | -5.1 | -0.3 | -2.2 | 0.8 |
| Depreciation and amortization | 124.3 | 84.8 | 100.6 | 184.1 | 192.2 | 206.4 | 199.6 | 196.6 |
| Loss on disposal of property and equipment | 0.6 | 3.2 | 5.1 | 6.7 | 0.9 | 2.3 | 10.4 | 1.5 |
| Net gain on sale of investments | -0.1 | | -5.3 | | -0.2 | -0.3 | -0.5 | 0.6 |
| Amortization of debt issuance costs and debt discount | 18.9 | 13.7 | 1.2 | 1.2 | 7.8 | 13.2 | 21.1 | 24.1 |
| Provision (recovery) for doubtful accounts receivable and sales allowances | 2.2 | 5.2 | 7.6 | 9.2 | 11.3 | 9.3 | 11.8 | 12.7 |
| Non-cash purchase accounting adjustments to inventory | 30.6 | | | | | | | |
| Non-cash stock-based compensation expense | 126.3 | 88.5 | 84.9 | 73.6 | 77.2 | 83.1 | 101.6 | 137.2 |
| Changes in assets and liabilities, net of acquisitions and divestitures: | | | | | | | | |
| Accounts receivable | -9.4 | -16.0 | 17.1 | -25.5 | 4.7 | 53.6 | -39.2 | -73.4 |
| Inventories | 3.6 | -1.8 | 6.6 | 24.2 | 4.7 | 1.3 | -4.7 | 25.3 |
| Prepaid expenses and other assets | 7.6 | -15.8 | -11.0 | -66.0 | 4.0 | -1.7 | 13.7 | 4.2 |
| Deferred tax assets | -0.8 | 0.2 | -0.9 | 83.0 | 1.3 | -2.2 | -1.1 | -0.8 |
| Accounts payable | 15.8 | 0.1 | 2.3 | -28.9 | 7.7 | -38.9 | -26.4 | -11.1 |
| Accrued employee compensation | -43.7 | -59.7 | -11.4 | -57.9 | 47.7 | 0.2 | -100.8 | -28.7 |
| Deferred revenue | -28.0 | 1.3 | 8.7 | 8.6 | 22.7 | 19.6 | 15.4 | 26.5 |
| Other accrued liabilities | -40.9 | 50.4 | 96.4 | 12.9 | 20.3 | 20.9 | -10.7 | -4.7 |
| Restructuring liabilities | -1.4 | -2.8 | -12.3 | 14.8 | -1.4 | -6.0 | -11.2 | |
| Net cash provided by operating activities | 409.9 | 447.5 | 541.6 | 451.0 | 590.9 | 449.2 | 298.5 | 115.6 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Purchases of non-marketable equity and debt investments | -2.4 | -2.2 | -0.2 | | | | -0.2 | |
| Proceeds from maturities and sale of short-term investments | 150.3 | | | | 1.0 | 1.6 | 3.3 | 156.0 |
| Purchases of property and equipment | -77.0 | -68.7 | -54.7 | -52.4 | -72.8 | -96.8 | -201.6 | -162.8 |
| Purchase of intangible assets | | | | | | | | |
| Net cash paid in connection with acquisitions | -564.9 | -95.5 | -16.9 | -44.6 | | | | -1,297.5 |
| Proceeds from collection of note receivable | 0.3 | 0.3 | 0.3 | 70.0 | | | | |
| Net proceeds from sale of software product line | | | 10.0 | | 0.0 | 3.9 | | |
| Net cash provided by (used in) investing activities | -493.8 | -172.4 | -50.8 | -27.0 | -71.8 | -91.3 | -168.4 | -199.2 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Payment of principal related to the term loan | -20.0 | | | | | -359.9 | -769.6 | -166.0 |
| Payment of debt issuance costs | -1.2 | -1.7 | | -1.0 | | -1.2 | -3.7 | |
| Payment of principal related to capital leases | -0.3 | -1.8 | -2.5 | -1.6 | -1.9 | -1.8 | -1.2 | |
| Common stock repurchases | -841.6 | -343.7 | -335.4 | -240.0 | -130.2 | -210.7 | -25.0 | |
| Proceeds from issuance of common stock | 49.5 | 51.4 | 84.0 | 93.8 | 98.8 | 97.2 | 81.6 | 145.7 |
| Payment of cash dividends to stockholders | -83.8 | -67.5 | -30.4 | | | | | |
| Proceeds from term loan | 787.3 | | | | | | | |
| Proceeds from convertible notes | | | | | | | | |
| Purchase of convertible note hedge | | | | | | | | |
| Proceeds from issuance of warrants | | | | | | | | |
| Proceeds from noncontrolling interest | 2.6 | | | | | | | |
| Excess tax benefits from stock-based compensation | 9.6 | 48.9 | 64.6 | 3.2 | 5.1 | 0.3 | 2.2 | -0.8 |
| Net cash used in financing activities | -97.8 | -83.7 | -219.7 | -149.4 | -218.1 | -277.1 | -127.7 | -37.7 |
| Effect of exchange rate fluctuations on cash and cash equivalents | -2.1 | -5.6 | -3.1 | -0.8 | -1.9 | -0.6 | -2.6 | 1.6 |
| Net decrease in cash and cash equivalents | -183.8 | 185.9 | 268.0 | 273.8 | 299.0 | 80.2 | -0.2 | -119.7 |
| Cash and cash equivalents, beginning of period | 1,440.9 | 1,255.0 | 987.0 | 713.2 | 414.2 | 334.0 | 334.2 | 453.9 |
| Cash and cash equivalents, end of period | 1,257.1 | 1,440.9 | 1,255.0 | 987.0 | 713.2 | 414.2 | 334.0 | 334.2 |
| |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash paid for interest | 28.3 | 29.6 | 34.7 | 39.8 | 44.7 | 56.6 | 59.5 | 83.4 |
| Cash paid for income taxes | 49.9 | 41.4 | 22.2 | 14.5 | 5.0 | 1.1 | 8.8 | -20.0 |
| Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] | | | | | | | | |