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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill and Other Intangible Assets | The following table, which may contain summation differences due to rounding, sets forth information for the Company’s goodwill and intangible assets as of the dates indicated (in millions):
| March 31, 2013 |  | December 31, 2012
Amortizing intangible assets: (1) |  |  |
Gross carrying amount | $ | 129.4 |  |  | $ | 129.5 |
Less: accumulated amortization | (62.5 | ) |  | (58.5 | )
Amortizing intangible assets, net | $ | 66.8 |  |  | $ | 71.0 |
Non-amortizing intangible assets: |  |  |
Trade names | $ | 34.7 |  |  | $ | 34.8 |
Pre-qualifications | 31.3 |  |  | 31.3 |
Non-amortizing intangible assets | 66.0 |  |  | 66.1 |
Goodwill | $ | 824.0 |  |  | $ | 824.7 |
Goodwill and other intangible assets | $ | 956.9 |  |  | $ | 961.8 |
(1)Consists principally of customer relationships, backlog, trade names and non-compete agreements with finite lives. During the first quarter of 2013, the Company recorded a $4.7 million post-closing purchase price adjustment for the DTS acquisition based on DTS's final closing tangible net worth and net working capital, as prescribed in the related purchase agreement, which resulted in the revision of comparative financial information as of December 31, 2012. See Note 3 - Acquisitions and Other Investments. See Note 4 - Discontinued Operations for information pertaining to goodwill and other intangible assets of discontinued operations.
Rollforward of Goodwill and Other Intangible Assets | The following table, which may contain summation differences due to rounding, provides a reconciliation of changes in goodwill and other intangible assets for the periods indicated (in millions):
|  |  | Other Intangible Assets |  |
| Goodwill |  | Non-amortizing |  | Amortizing |  | Total
Balance as of December 31, 2011 | $ | 714.8 |  |  | $ | 66.2 |  |  | $ | 44.5 |  |  | $ | 825.5 |
Accruals of acquisition-related contingent consideration (a) | $ | — |  |  |  |  |  |  | $ | — |
Amortization expense |  |  |  |  | $ | (2.8 | ) |  | $ | (2.8 | )
Balance as of March 31, 2012 | $ | 714.8 |  |  | $ | 66.2 |  |  | $ | 41.7 |  |  | $ | 822.7 |
Balance as of December 31, 2012 | $ | 824.7 |  |  | $ | 66.1 |  |  | $ | 71.0 |  |  | $ | 961.8 |
Accruals of acquisition-related contingent consideration (a) | — |  |  |  |  |  |  | $ | — |
Amortization expense |  |  |  |  | (4.2 | ) |  | $ | (4.2 | )
Currency translation adjustments | (0.7 | ) |  | (0.1 | ) |  | — |  |  | $ | (0.8 | )
Balance as of March 31, 2013 | $ | 824.0 |  |  | $ | 66.0 |  |  | $ | 66.8 |  |  | $ | 956.9 |
(a) | Represents contingent consideration for acquisitions prior to January 1, 2009, which is only accrued as earned, in accordance with U.S. GAAP.
Rollforward of Goodwill by Segment | The following table provides a reconciliation of changes in goodwill by reportable segment for the periods indicated (in millions):
| Communications |  | Electrical Transmission |  | Oil and Gas |  | Power Generation and Industrial |  | Total Goodwill
Balance as of December 31, 2011 | $ | 258.0 |  |  | $ | 129.5 |  |  | $ | 209.7 |  |  | $ | 117.6 |  |  | $ | 714.8 |
Accruals of acquisition-related contingent consideration (a) | — |  |  | — |  |  | — |  |  | — |  |  | $ | — |
Balance as of March 31, 2012 | $ | 258.0 |  |  | $ | 129.5 |  |  | $ | 209.7 |  |  | $ | 117.6 |  |  | $ | 714.8 |
Balance as of December 31, 2012 | $ | 306.8 |  |  | $ | 129.5 |  |  | $ | 270.8 |  |  | $ | 117.6 |  |  | $ | 824.7 |
Accruals of acquisition-related contingent consideration (a) | — |  |  | — |  |  | — |  |  | — |  |  | $ | — |
Currency translation adjustments | — |  |  | — |  |  | (0.7 | ) |  | — |  |  | $ | (0.7 | )
Balance as of March 31, 2013 | $ | 306.8 |  |  | $ | 129.5 |  |  | $ | 270.1 |  |  | $ | 117.6 |  |  | $ | 824.0 |
(a) Represents contingent consideration for acquisitions prior to January 1, 2009, which is only accrued as earned, in accordance with U.S. GAAP. See Note 16 - Segments and Operations by Geographic Area for details pertaining to the Company's reportable segments.

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