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Goodwill (Details) (USD $)
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3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Goodwill And Intangible Assets Disclosure [Abstract] | ||
| Impairment loss for goodwill | $ 0us-gaap_GoodwillImpairmentLoss | $ 0us-gaap_GoodwillImpairmentLoss |
| Accumulated impairment of goodwill since the Merger | $ 4,766,190,000us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | |
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- Details
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- Definition
Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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