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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Millions | Total | Common Stock [Member] | Additional Paid-in-Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Sep. 24, 2016 |  | 285,015 |  |  |  | 7,289
Balance at Sep. 24, 2016 | $ 2,142.7 | $ 2.9 | $ 5,560.3 | $ (3,138.2) | $ (32.3) | $ (250.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options (in shares) |  | 1,427 |  |  |  |
Exercise of stock options | 33.1 | $ 0.0 | 33.1 |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes (in shares) |  | 939 |  |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes | (19.7) |  | (19.7) |  |  |
Common stock issued under the employee stock purchase plan (in shares) |  | 472 |  |  |  |
Common stock issued under the employee stock purchase plan | 15.0 |  | 15.0 |  |  |
Stock-based compensation expense | 68.2 |  | 68.2 |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | 5,271
Repurchase of common stock | (200.1) |  |  |  |  | $ (200.1)
Reclassification of liability award to equity | 7.8 |  | 7.8 |  |  |
Reacquisition of equity component from convertible notes repurchase, net of taxes | (33.9) |  | (33.9) |  |  |
Net (loss) income | 755.5 |  |  | 755.5 |  |
Foreign currency translation adjustment | 7.6 |  |  |  | 7.6 |
Adjustment to minimum pension liability, net | 0.9 |  |  |  | 0.9 |
Unrealized losses on derivatives, net of taxes | 0.8 |  |  |  | 0.8 |
Unrealized gains on marketable securities | 2.3 |  |  |  | 2.3 |
Interest cost of interest rate cap reclassified to statement of operations | 6.9 |  |  |  | 6.9 |
Net realized gains on marketable securities reclassified out of accumulated other comprehensive loss | (2.4) |  |  |  | (2.4) |
Balance (in shares) at Sep. 30, 2017 |  | 287,853 |  |  |  | 12,560
Balance at Sep. 30, 2017 | 2,784.7 | $ 2.9 | 5,630.8 | (2,382.7) | (16.2) | $ (450.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options (in shares) |  | 795 |  |  |  |
Exercise of stock options | 17.3 |  | 17.3 |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes (in shares) |  | 804 |  |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes | (16.7) |  | (16.7) |  |  |
Common stock issued under the employee stock purchase plan (in shares) |  | 448 |  |  |  |
Common stock issued under the employee stock purchase plan | 15.6 |  | 15.6 |  |  |
Stock-based compensation expense | 65.0 |  | 65.0 |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | 7,252
Repurchase of common stock | (275.8) |  |  |  |  | $ (275.8)
Reacquisition of equity component from convertible notes repurchase, net of taxes | (40.7) |  | (40.7) |  |  |
Net (loss) income | (111.3) |  |  |  |  |
Foreign currency translation adjustment | (8.1) |  |  |  | (8.1) |
Adjustment to minimum pension liability, net | 0.5 |  |  |  | 0.5 |
Unrealized losses on derivatives, net of taxes | (5.7) |  |  |  | (5.7) |
Unrealized gains on marketable securities | 0.0 |  |  |  |  |
Interest cost of interest rate cap reclassified to statement of operations | 3.6 |  |  |  | 3.6 |
Net realized gains on marketable securities reclassified out of accumulated other comprehensive loss | 0.4 |  |  |  | 0.4 |
Balance (in shares) at Sep. 29, 2018 |  | 289,900 |  |  |  | 19,812
Balance at Sep. 29, 2018 | 2,428.8 | $ 2.9 | 5,671.3 | (2,494.0) | (25.5) | $ (725.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Accounting standard transition adjustment - ASC 606 | 6.4 |  |  |  |  |
Accounting standard transition adjustment - ASU 2016-16 | $ 2.5 |  |  |  |  |
Exercise of stock options (in shares) | 1,300 | 1,304 |  |  |  |
Exercise of stock options | $ 32.8 |  | 32.8 |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes (in shares) |  | 645 |  |  |  |
Vesting of restricted stock units, net of shares withheld for employee taxes | (12.8) |  | (12.8) |  |  |
Common stock issued under the employee stock purchase plan (in shares) |  | 474 |  |  |  |
Common stock issued under the employee stock purchase plan | 16.5 |  | 16.5 |  |  |
Stock-based compensation expense | 62.0 |  | 62.0 |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | 4,826
Repurchase of common stock | (200.1) |  |  |  |  | $ (200.1)
Net (loss) income | (203.6) |  |  |  |  |
Foreign currency translation adjustment | (14.8) |  |  |  | (14.8) |
Adjustment to minimum pension liability, net | (0.6) |  |  |  | (0.6) |
Unrealized losses on derivatives, net of taxes | (8.0) |  |  |  | (8.0) |
Unrealized gain on interest rate swap | 3.5 |  |  |  | 3.5 |
Interest cost of interest rate cap reclassified to statement of operations | 3.1 |  |  |  | 3.1 |
Net realized gains on marketable securities reclassified out of accumulated other comprehensive loss | 0.0 |  |  |  |  |
Balance (in shares) at Sep. 28, 2019 |  | 292,323 |  |  |  | 24,638
Balance at Sep. 28, 2019 | $ 2,115.7 | $ 2.9 | $ 5,769.8 | $ (2,688.7) | $ (42.3) | $ (926.0)

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