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Antidilutive Shares (Details) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Antidilutive Securities [Abstract] |  |
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements | 6.3 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 6.8 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

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- Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
Name: | us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
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Data Type: | xbrli:sharesItemType
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