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Financial Instruments - Estimated Aggregate Fair Value and Carrying Value of Debt Instruments (Details) - USD ($) $ in Millions	Mar. 30, 2019	Dec. 31, 2018
Estimated aggregate fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments	$ 1,971.7	$ 1,921.6
Aggregate carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments	$ 1,965.6	$ 1,967.2

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: