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Aggregate dividends declared during the period for each share of common stock outstanding.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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

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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=6367179&loc=d3e4304-108586

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

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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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- Definition

Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	Feb. 04, 2015	Dec. 31, 2014	Aug. 01, 2007	Jul. 25, 2012	Sep. 06, 2013
Stockholders Equity Note [Line Items]
Remaining Amount approved for repurchases under stock buyback program		$ 187
2007 Program \| Maximum
Stockholders Equity Note [Line Items]
Amount approved for repurchases under stock buyback program			250
2012 Program \| Maximum
Stockholders Equity Note [Line Items]
Amount approved for repurchases under stock buyback program				150
2013 Program \| Maximum
Stockholders Equity Note [Line Items]
Amount approved for repurchases under stock buyback program					$ 200
Subsequent Event \| Dividend Declared
Stockholders Equity Note [Line Items]
Dividend declaration date	Feb. 04, 2015
Dividend per share, declared	$ 0.10
Dividend payment date	Mar. 25, 2015
Dividend record date	Mar. 11, 2015