Stockholders' Equity Dividends Declared (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
Dec. 09, 2014	Jul. 30, 2014	Apr. 17, 2014	Feb. 06, 2014	Dec. 12, 2013	Aug. 01, 2013	May 30, 2013	Dec. 09, 2014	Jul. 30, 2014	Apr. 17, 2014	Feb. 06, 2014	Dec. 12, 2013	Aug. 01, 2013	May 30, 2013
Statement of Stockholders' Equity [Abstract]
Dividends Payable, Date Declared	Dec. 09, 2014	Jul. 30, 2014	Apr. 17, 2014	Feb. 06, 2014	Dec. 12, 2013	Aug. 01, 2013	May 30, 2013
Dividends Payable, Amount Per Share								$ 0.115us-gaap_DividendsPayableAmountPerShare	$ 0.115us-gaap_DividendsPayableAmountPerShare	$ 0.115us-gaap_DividendsPayableAmountPerShare	$ 0.10us-gaap_DividendsPayableAmountPerShare	$ 0.10us-gaap_DividendsPayableAmountPerShare	$ 0.10us-gaap_DividendsPayableAmountPerShare	$ 0.10us-gaap_DividendsPayableAmountPerShare
Dividends Payable, Date of Record	Jan. 02, 2015	Oct. 01, 2014	Jul. 01, 2014	Apr. 01, 2014	Jan. 08, 2014	Oct. 01, 2013	Jul. 01, 2013
Dividends, Common Stock, Cash	$ 234us-gaap_DividendsCommonStockCash	$ 239us-gaap_DividendsCommonStockCash	$ 237us-gaap_DividendsCommonStockCash	$ 209us-gaap_DividendsCommonStockCash	$ 206us-gaap_DividendsCommonStockCash	$ 210us-gaap_DividendsCommonStockCash	$ 212us-gaap_DividendsCommonStockCash
Dividends Payable, Date to be Paid	Jan. 23, 2015	Oct. 23, 2014	Jul. 23, 2014	Apr. 23, 2014	Jan. 23, 2014	Oct. 23, 2013	Jul. 23, 2013

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

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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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

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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- Definition

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

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- Definition

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

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- Definition

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

+ References

No definition available.

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