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Stockholders' Equity and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
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Dec. 31, 2013 | Mar. 31, 2012 | Sep. 26, 2020 | Jun. 27, 2020 | Mar. 28, 2020 | Sep. 28, 2019 | Sep. 29, 2018 | Sep. 26, 2020 | Sep. 28, 2019 | Sep. 29, 2018 | Dec. 11, 2019 | Jun. 21, 2016 | Jun. 13, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized value of common shares to be repurchased |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0
Percentage of award vested upon meeting defined market based criteria | 33.33% |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation, period of vest term granted to employees, years |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Cliff vesting period from grant date |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Tax benefit related to stock based compensation |  |  |  |  |  |  |  | $ 9,500,000 | $ 8,900,000 | $ 11,700,000 |  |  |
Intrinsic value of option exercised |  |  |  |  |  |  |  | $ 44,800,000 | 26,100,000 | 15,200,000 |  |  |
Granted |  |  |  |  |  |  |  | 0.9 |  |  |  |  |
Minimum eligible percentage to receive target number of shares of company's common stock |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Maximum eligible percentage to receive target number of shares of company's common stock |  |  |  |  |  |  |  | 200.00% |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  | $ 83,300,000 | $ 62,000,000.0 | $ 65,000,000.0 |  |  |
Shares repurchased (in shares) |  |  |  |  |  | 2.3 |  |  | 4.8 | 5.0 |  |  |
Common stock repurchases |  |  |  |  |  |  | $ 88,500,000 |  | $ 200,100,000 | $ 187,300,000 |  |  |
ASR Shares Repurchased during the period |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |
ASR Authorized |  |  | $ 205 |  | $ 205,000,000 |  |  |  |  |  |  |  |
Amount paid during the period under ASR Agreement |  |  |  |  | $ 164,000,000.0 |  |  |  |  |  |  |  |
June 13, 2019 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) |  |  |  |  | 3.9 |  |  |  |  |  |  |  |
Common stock repurchases |  |  |  |  | $ 210,900,000 |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of forfeiture rates |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of forfeiture rates |  |  |  |  |  |  |  | 6.00% |  |  |  |  |
Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  | $ 15,500,000 | 14,100,000 | 14,300,000 |  |  |
Unrecognized compensation expense |  |  | 19,500,000 |  |  |  |  | $ 19,500,000 |  |  |  |  |
Weighted average period of unrecognized stock-based compensation, years |  |  |  |  |  |  |  | 2 years 3 months 18 days |  |  |  |  |
Stock Options | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation, period of vest term granted to employees, years |  |  |  |  |  |  |  | 4 years |  |  |  |  |
Percentage of vesting for stock options granted to employees |  |  |  |  |  |  |  | 25.00% |  |  |  |  |
Stock Options | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation, period of vest term granted to employees, years |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Percentage of vesting for stock options granted to employees |  |  |  |  |  |  |  | 20.00% |  |  |  |  |
RSUs |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation, period of vest term granted to employees, years |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  | $ 63,300,000 | 43,700,000 | 46,500,000 |  |  |
Unrecognized compensation expense |  |  | $ 50,000,000.0 |  |  |  |  | $ 50,000,000.0 |  |  |  |  |
Weighted average period of unrecognized stock-based compensation, years |  |  |  |  |  |  |  | 1 year 8 months 12 days |  |  |  |  |
Fair value of RSUs vested |  |  |  |  |  |  |  | $ 34,900,000 | $ 34,600,000 | $ 38,900,000 |  |  |
RSUs | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of vesting for RSUs granted to employees |  |  |  |  |  |  |  | 33.00% |  |  |  |  |
Performance Shares |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  |  |  | 0.1 | 0.1 | 0.6 |  |  |
Vested, weighted average grant date fair value (in usd per share) |  |  |  |  |  |  |  | $ 45.38 | $ 40.97 | $ 40.86 |  |  |
Market Based Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cliff vesting period from grant date |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Granted |  |  |  |  |  |  |  | 0.1 | 0.1 | 0.3 |  |  |
Vested, weighted average grant date fair value (in usd per share) |  |  |  |  |  |  |  | $ 43.54 | $ 55.13 | $ 49.44 |  |  |
Minimum eligible percentage to receive target number of shares of company's common stock |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Maximum eligible percentage to receive target number of shares of company's common stock |  |  |  |  |  |  |  | 200.00% |  |  |  |  |
PSU Free Cash Flow [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  |  |  | 0.1 |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  |  |  | 0.6 | 0.9 | 0.8 |  |  |
2008 Equity Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  | 31.5 |  |  |  |  | 31.5 |  |  |  |  |
Shares available for grant |  |  | 5.7 |  |  |  |  | 5.7 |  |  |  |  |
2012 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares that may be issued under Employee Stock Purchase Plan |  | 2.5 |  |  |  |  |  |  |  |  |  |  |
Percentage of common stock price for ESPP |  | 85.00% |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  |  | $ 4,500,000 | $ 4,200,000 | $ 4,000,000.0 |  |  |
Jun 21 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized value of common shares to be repurchased |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0 |
Period available for common stock to be repurchased |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Dec 11, 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining authorized repurchase amount |  |  | $ 262,400,000 |  |  |  |  | $ 262,400,000 |  |  |  |  |
Authorized value of common shares to be repurchased |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0 |  |
Shares repurchased (in shares) |  |  |  |  |  |  |  | 5.1 |  |  |  |  |
Common stock repurchases |  |  |  |  |  |  |  | $ 237,700,000 |  |  |  |  |

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