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Intangible Assets (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 5 Months Ended |  | 5 Months Ended |  | 5 Months Ended |  | 5 Months Ended |  | 5 Months Ended |  | 3 Months Ended | 5 Months Ended | 3 Months Ended | 9 Months Ended | 4 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Sep. 30, 2013 Directory services agreements | Dec. 31, 2012 Directory services agreements | Sep. 30, 2013 Client relationships | Dec. 31, 2012 Client relationships | Sep. 30, 2013 Trademarks and domain names | Dec. 31, 2012 Trademarks and domain names | Sep. 30, 2013 Patented technologies | Dec. 31, 2012 Patented technologies | Sep. 30, 2013 Advertising commitment | Dec. 31, 2012 Advertising commitment | Sep. 30, 2013 Super Media, Inc. | Sep. 30, 2013 Super Media, Inc. | Sep. 30, 2013 Dex One | Sep. 30, 2013 Dex One | Apr. 29, 2013 As Previously Reported Directory services agreements | Apr. 29, 2013 As Previously Reported Client relationships | Apr. 29, 2013 As Previously Reported Trademarks and domain names | Apr. 29, 2013 As Previously Reported Patented technologies | Apr. 29, 2013 As Previously Reported Advertising commitment
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, gross | $ 3,166 |  | $ 3,166 |  | $ 2,531 | $ 1,475 | $ 1,330 | $ 1,155 | $ 735 | $ 440 | $ 380 | $ 85 | $ 75 | $ 11 | $ 11 |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | 1,175 |  | 1,175 |  | 698 | 579 | 363 | 413 | 217 | 140 | 84 | 37 | 30 | 6 | 4 |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, net | 1,991 |  | 1,991 |  | 1,833 | 896 | 967 | 742 | 518 | 300 | 296 | 48 | 45 | 5 | 7 |  |  |  |  |  |  |  |  |
Estimated Remaining Useful Lives |  |  |  |  |  | 5 years |  | 4 years |  | 6 years |  | 5 years |  | 3 years |  |  |  |  |  | 9 years | 8 years | 8 years | 5 years | 5 years
Amortization expense | 226 | 87 | 477 | 262 |  |  |  |  |  |  |  |  |  |  |  | 66 | 110 |  |  |  |  |  |  |
Increase in amortization expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73 | 105 |  |  |  |  |
Estimated amortization expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 703 |  | 703 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 768 |  | 768 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 514 |  | 514 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 310 |  | 310 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 141 |  | 141 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | $ 32 |  | $ 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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