| Goodwill and Intangible Assets Disclosure |
INTANGIBLE ASSETS AND GOODWILL The changes in the carrying amount of intangible assets and goodwill were as follows as of December 31, 2015 and 2014. See Note 20. Acquisitions and Divestitures for a further description of the goodwill and intangible assets resulting from Delphi's acquisitions in 2015 and 2014. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2015 | | As of December 31, 2014 | | Estimated Useful Lives | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | (Years) | | (in millions) | | (in millions) | Amortized intangible assets: | | | | | | | | | | | | | | Patents and developed technology | 6-15 | | $ | 745 |
| | $ | 279 |
| | $ | 466 |
| | $ | 633 |
| | $ | 229 |
| | $ | 404 |
| Customer relationships | 4-14 | | 861 |
| | 171 |
| | 690 |
| | 394 |
| | 143 |
| | 251 |
| Trade names | 5-20 | | 105 |
| | 30 |
| | 75 |
| | 99 |
| | 26 |
| | 73 |
| Total | | | 1,711 |
| | 480 |
| | 1,231 |
| | 1,126 |
| | 398 |
| | 728 |
| Unamortized intangible assets: | | | | | | | | | | | | | | In-process research and development | — | | 24 |
| | — |
| | 24 |
| | — |
| | — |
| | — |
| Trade names | — | | 128 |
| | — |
| | 128 |
| | — |
| | — |
| | — |
| Goodwill | — | | 1,539 |
| | — |
| | 1,539 |
| | 656 |
| | — |
| | 656 |
| Total | | | $ | 3,402 |
| | $ | 480 |
| | $ | 2,922 |
| | $ | 1,782 |
| | $ | 398 |
| | $ | 1,384 |
|
Estimated amortization expense for the years ending December 31, 2016, 2017, 2018, 2019 and 2020 is presented below: | | | | | | | | | | | | | | | | | | | | | | Year Ending December 31, | | 2016 | | 2017 | | 2018 | | 2019 | | 2020 | | (in millions) | Estimated amortization expense | $ | 136 |
| | $ | 134 |
| | $ | 129 |
| | $ | 117 |
| | $ | 116 |
|
A roll-forward of the gross carrying amounts of intangible assets for the years ended December 31, 2015 and 2014 is presented below. | | | | | | | | | | 2015 | | 2014 | | (in millions) | Balance at January 1 | $ | 1,782 |
| | $ | 1,516 |
| Acquisitions (1) | 1,701 |
| | 384 |
| Foreign currency translation and other | (81 | ) | | (118 | ) | Balance at December 31 | $ | 3,402 |
| | $ | 1,782 |
|
| | (1) | Primarily attributable to the 2014 acquisitions of Antaya Technologies Corporation and Unwired Holdings, Inc. and the 2015 acquisitions of HellermannTyton Group PLC, Control-Tec LLC and Ottomatika, Inc., as further described in Note 20. Acquisitions and Divestitures. |
A roll-forward of the accumulated amortization for the years ended December 31, 2015 and 2014 is presented below: | | | | | | | | | | 2015 | | 2014 | | (in millions) | Balance at January 1 | $ | 398 |
| | $ | 322 |
| Amortization | 93 |
| | 94 |
| Foreign currency translation and other | (11 | ) | | (18 | ) | Balance at December 31 | $ | 480 |
| | $ | 398 |
|
A roll-forward of the carrying amount of goodwill, by operating segment, for the years ended December 31, 2015 and 2014 is presented below: | | | | | | | | | | | | | | | | | | Electrical/Electronic Architecture | | Powertrain Systems | | Electronics and Safety | | Total | | (in millions) | Balance at January 1, 2014 | $ | 487 |
| | $ | 9 |
| | $ | — |
| | $ | 496 |
| Acquisitions (1) | 223 |
| | — |
| | — |
| | 223 |
| Foreign currency translation and other | (62 | ) | | (1 | ) | | — |
| | (63 | ) | Balance at December 31, 2014 | $ | 648 |
| | $ | 8 |
| | $ | — |
| | $ | 656 |
| Acquisitions (2) | $ | 856 |
| | $ | — |
| | $ | 73 |
| | $ | 929 |
| Foreign currency translation and other | (46 | ) | | — |
| | — |
| | (46 | ) | Balance at December 31, 2015 | $ | 1,458 |
| | $ | 8 |
| | $ | 73 |
| | $ | 1,539 |
|
| | (1) | Primarily attributable to the acquisitions of Antaya Technologies Corporation and Unwired Holdings, Inc., as further described in Note 20. Acquisitions and Divestitures. |
| | (2) | Primarily attributable to the acquisitions of HellermannTyton Group PLC, Control-Tec LLC and Ottomatika, Inc., as further described in Note 20. Acquisitions and Divestitures. |
|