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Goodwill, Customer Relationships and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill, customer relationships and other intangible assets | Goodwill, customer relationships and other intangible assets consisted of the following:
|  |  | Successor
| Weighted Average of Remaining Lives |  | December 31, 2013 |  | December 31, 2012
|  |  | (Dollars in millions)
Goodwill | N/A |  | $ | 9,354 |  |  | 9,354 |
Customer relationships, less accumulated amortization of $2,012 and $1,320 | 7.3 years |  | 3,687 |  |  | 4,379 |
Other intangible assets subject to amortization Capitalized software, less accumulated amortization of $994 and $704 | 3.0 years |  | 1,008 |  |  | 1,212 |
Summary of amortization expense | Total amortization expense for intangible assets was as follows:
| Successor |  |  | Predecessor
| Year Ended December 31, 2013 |  | Year Ended December 31, 2012 |  | Nine Months Ended December 31, 2011 |  |  | Three Months Ended March 31, 2011
| (Dollars in millions)
Amortization expense for intangible assets | $ | 1,029 |  |  | 1,115 |  |  | 952 |  |  |  | 58 |
Schedule of estimated amortization expense for intangible assets | The estimated future amortization expense for intangible assets is as follows:
| (Dollars in millions)
Year ending December 31, |
2014 | $ | 894 |
2015 | 821 |
2016 | 743 |
2017 | 667 |
2018 | 581 |
2019 and thereafter | 989 |

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- Definition Tabular disclosure of the amount of amortization expense for finite-lived intangible assets. + References No definition available. + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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