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Debt - Convertible Senior Notes (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Mar. 06, 2017 USD ($) item $ / shares | Dec. 28, 2019 item
1.375% Convertible Senior Notes |  |
Debt |  |
Principal amount | $ | $ 400.0 |
Semi-annual interest rate | 1.375% |
Conversion rate, shares per $1,000 principal | 10.7744 |
Number of shares of common stock | $ | 4.3 |
Initial conversion price | $ / shares | $ 92.81 |
Debt issuance costs | $ | $ 10.6 |
1.375% Convertible Senior Notes | Conversion of Notes, Holders |  |
Debt |  |
Number of trading days within 30 trading day period | 20 |
Number of consecutive trading days | 30 |
Debt Instrument, Convertible, Stock Price Trigger | $ / shares | $ 120.66 |
Minimum amount the sales price of the Company's stock exceeds the conversion price (as a percent) | 130.00% |
Number of consecutive business days after the 10 consecutive trading day period | 5 |
Number of consecutive trading days before the five consecutive business days | 10 |
Maximum amount the sales price of the Company's stock exceeds the conversion price (as a percent) | 98.00% |
1.375% Convertible Senior Notes | Conversion of Notes, Company |  |
Debt |  |
Number of trading days within 30 trading day period |  | 20
Number of consecutive trading days |  | 30
Minimum amount the sales price of the Company's stock exceeds the conversion price (as a percent) |  | 130.00%
Amended Credit Agreement | Credit Facility |  |
Debt |  |
Repayments of Lines of Credit | $ | $ 72.5 |

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