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Software, net (Tables) | 12 Months Ended
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Dec. 31, 2018
Research and Development [Abstract] |
Schedule of Capitalized Computer Software | Software, net consisted of the following:
|  | As of December 31,
|  | 2018 |  | 2017
Software |  | $ | 1,101.6 |  |  | $ | 1,003.2 |
Accumulated amortization |  | (816.3 | ) |  | (663.8 | )
Software, net |  | $ | 285.3 |  |  | $ | 339.4 |
Schedule of Software Amortization Expense | The following reflects intangible amortization expense included within D&A:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Amortization expense | $ | 297.1 |  |  | $ | 260.0 |  |  | $ | 251.9 |
The following reflects amortization of software included within D&A:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Amortization expense | $ | 160.5 |  |  | $ | 153.3 |  |  | $ | 158.9 |

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