Debt And Bank Credit Facilities (Details On The Senior Notes) (Details) - USD ($)	9 Months Ended
Oct. 03, 2015	Jan. 03, 2015
Floating Rate Series 2007A
Debt Instrument [Line Items]
Variable rate terms	Floating (1)
Interest rate	1.00%	0.90%
Maturity	Aug. 23, 2017
Fixed Rate Series 2011A
Debt Instrument [Line Items]
Debt instrument interest rate	4.10%
Maturity	Jul. 14, 2018
Fixed Rate Series 2011A
Debt Instrument [Line Items]
Stated rate, minimum	4.80%
Stated rate, maximum	5.00%
Maturity	Jul. 14, 2021
Fixed Rate Series 2011A
Debt Instrument [Line Items]
Stated rate, minimum	4.90%
Stated rate, maximum	5.10%
Maturity	Jul. 14, 2023
Senior Notes
Debt Instrument [Line Items]
Principal	$ 600,000,000
Senior Notes \| Floating Rate Series 2007A
Debt Instrument [Line Items]
Principal	100,000,000.0
Senior Notes \| Fixed Rate Series 2011A
Debt Instrument [Line Items]
Principal	100,000,000.0
Senior Notes \| Fixed Rate Series 2011A
Debt Instrument [Line Items]
Principal	230,000,000.0
Senior Notes \| Fixed Rate Series 2011A
Debt Instrument [Line Items]
Principal	$ 170,000,000.0

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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

+ References

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(a)(1))

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Maximum contractual interest rate for funds borrowed, under the debt agreement.

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Minimum contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

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