Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

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Debt - Unsecured Senior Notes narrative (Details) € in Millions, $ in Millions			3 Months Ended		6 Months Ended
	Feb. 09, 2018 USD ($)	Feb. 08, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2018 EUR (€)	Jun. 30, 2018 USD ($)	Dec. 30, 2017 USD ($)
Debt Instrument [Line Items]
Principal amount of debt outstanding			$ 3,049.3		$ 3,049.3	$ 3,987.9
Unsecured debt
Debt Instrument [Line Items]
Repayments of debt					913.7
Unsecured debt \| —Dollar Senior Notes
Debt Instrument [Line Items]
Principal amount of debt outstanding			$ 568.0		$ 568.0	1,190.0
Stated interest rate on debt			6.00%		6.00%
Repayments of debt	$ 100.0	$ 522.0	$ 622.0
Unsecured debt \| —Euro Senior Notes
Debt Instrument [Line Items]
Principal amount of debt outstanding			$ 0.0		$ 0.0	$ 282.5
Repayments of debt				€ 235.0	$ 291.7