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Earnings Per Share and Certain Related Information (Narrative) (Details) - USD ($)			1 Months Ended	3 Months Ended
	Jan. 18, 2018	Dec. 01, 2016	Jul. 23, 2015	Dec. 29, 2017	Mar. 16, 2018	Nov. 10, 2017	Sep. 29, 2017
Earnings Per Share Basic [Line Items]
Amount authorized to be repurchased			$ 500,000,000
Number of shares repurchased			5,156,000	0
Quarterly dividend per share						$ 0.15
Payment of dividends							$ 0
Dividends payment date		Nov. 10, 2017
Dividends record date		Sep. 27, 2017
Subsequent Event
Earnings Per Share Basic [Line Items]
Quarterly dividend per share					$ 0.15
Dividends payment date	Mar. 16, 2018
Dividends record date	Feb. 16, 2018

X

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

+ References

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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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.

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Amount of stock repurchase plan authorized.

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