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Other Expense, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Nov. 10, 2015 | Jan. 29, 2015
Restructuring expense | $ 19.2 | $ 19.9 | $ 25.6 | $ 32.0 |  |
Merger and acquisition expense | 7.2 | 0.0 | 13.0 | 0.0 |  |
Gain on previously held equity interest |  |  | 0.0 | (10.8) |  |
Other income | (1.4) | (0.8) | (1.9) | (0.9) |  |
Other expense, net | 25.0 | 19.1 | 36.7 | 20.3 |  |
Remy International Inc. |  |  |  |  |  |
Equity interest acquired |  |  |  |  | 100.00% |
BERU Diesel Start Systems Pvt. Ltd. |  |  |  |  |  |
Gain on previously held equity interest | $ 0.0 | $ 0.0 | $ 0.0 | $ (10.8) |  |
Equity interest acquired |  |  |  |  |  | 51.00%

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