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Acquisitions (Details) - USD ($) $ in Millions |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 26, 2016 | Nov. 30, 2015 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2015
Acquisition |  |  |  |  |
Estimated useful lives |  |  | 11 years 2 months 12 days |  |
Goodwill resulted through acquisition |  |  | $ 495.5 |  | $ 489.0
Redeemable financial instrument |  |  |  |  |
Acquisition |  |  |  |  |
Liability recorded at acquisition date fair value |  |  | $ 6.8 |  | 5.7
Customer relationships |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  |  | 11 years 2 months 12 days |  |
Technology |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  |  | 9 years 1 month 6 days |  |
Trade name |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  |  | 14 years 2 months 12 days |  |
Aerco Korea |  |  |  |  |
Acquisition |  |  |  |  |
Outstanding shares acquired (as a percent) | 50.00% |  |  |  |
Percentage of ownership before transaction | 40.00% |  |  |  |
Aggregate ownership percentage | 90.00% |  |  |  |
Shares remaining to be acquired | 10.00% |  | 10.00% |  |
Pre-tax gain on the previously held ownership interest | $ 1.7 |  |  |  |
Liability recorded at acquisition date fair value | 0.8 |  |  | $ 0.8 |
Aggregate consideration, net | 4.0 |  |  |  |
Goodwill resulted through acquisition | 3.3 |  |  |  |
Purchase price allocated to intangible assets | $ 1.6 |  |  |  |
Aerco Korea | Customer relationships |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  |  | 10 years |  |
Apex |  |  |  |  |
Acquisition |  |  |  |  |
Outstanding shares acquired (as a percent) |  | 80.00% |  |  |
Shares remaining to be acquired |  | 20.00% | 20.00% |  |
Number of years of closing |  | 3 years |  |  |
Liability recorded at acquisition date fair value |  | $ 5.5 |  |  | $ 5.5
Aggregate consideration, net |  | 20.4 |  |  |
Goodwill resulted through acquisition |  | 12.9 |  |  |
Purchase price allocated to intangible assets |  | $ 10.1 |  |  |
Apex | Customer relationships |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  | 10 years |  |  |
Apex | Trade name |  |  |  |  |
Acquisition |  |  |  |  |
Estimated useful lives |  | 15 years |  |  |

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