Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 27, 2019	Dec. 31, 2018
Carrying amount and estimated fair value of long term debt
Carrying Amount	$ 2,040.6	$ 1,792.1
Fair Value	2,089.0	1,725.7
Secured Debt Term A [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]
Carrying Value Term Loan	452.3
Debt Instrument [Line Items]
Secured Debt, Current	22.7	22.7
Secured Long-term Debt, Noncurrent	429.6	182.0
Carrying amount and estimated fair value of long term debt
Carrying Amount		204.7
Fair Value	452.6	197.8
Senior unsecured notes due 2022 [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount	298.8	298.5
Fair Value	298.9	292.9
Senior Notes, Noncurrent	298.8	298.5
Senior Unsecured Notes Due 2023 [Domain]
Carrying amount and estimated fair value of long term debt
Fair Value	308.1	297.5
Senior Notes, Noncurrent	298.1	297.9
Senior Unsecured Notes Due 2026 [Member]
Carrying amount and estimated fair value of long term debt
Fair Value	299.3	274.5
Senior Notes, Noncurrent	297.7	297.5
SeniorUnsecuredNotesDueTwoThousandAndTwentySix [Member] [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount	693.7	693.5
Fair Value	$ 730.1	$ 663.0

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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-Publisher FASB
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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