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Commitments and contingent liabilities (Detail) ¥ in Millions, $ in Millions |  | 3 Months Ended
--- | --- | ---
Dec. 05, 2014 USD ($) | Apr. 02, 2017 USD ($) | Apr. 02, 2017 CNY (¥)
Loss Contingencies [Line Items] |  |  |
Estimated litigation liability |  | $ 2.4 |
Minimum |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated time fram over which accrued amounts may be paid out |  | 15 years | 15 years
Maximum |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated time fram over which accrued amounts may be paid out |  | 20 years | 20 years
Accrued Liabilities |  |  |
Loss Contingencies [Line Items] |  |  |
Accrual for environmental loss contingencies |  | $ 1.1 |
Other Liability |  |  |
Loss Contingencies [Line Items] |  |  |
Accrual for environmental loss contingencies |  | 5.6 |
Discontinued Operations |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated litigation liability |  | 1.7 |
Distributor vs Teleflex Medical Trading Company, Ltd. |  |  |
Loss Contingencies [Line Items] |  |  |
Damages sought |  | 10.1 | ¥ 69.3
Distributor vs Teleflex Medical Trading Company, Ltd. Repurchase of Inventory |  |  |
Loss Contingencies [Line Items] |  |  |
Damages sought |  | 9.1 | 63.0
Teleflex Medical Trading Company, Ltd. vs Distributor - Outstanding Receivables |  |  |
Loss Contingencies [Line Items] |  |  |
Damages sought |  | 8.9 | ¥ 61.2
Compensatory Damages | Judicial Ruling | Parish of Calcasieu |  |  |
Loss Contingencies [Line Items] |  |  |
Damages awarded | $ 0.1 |  |
Punitive Damages | Judicial Ruling | Parish of Calcasieu |  |  |
Loss Contingencies [Line Items] |  |  |
Damages awarded | $ 23.0 |  |
Unfavorable Regulatory Action | Judicial Ruling | Parish of Calcasieu | Maximum |  |  |
Loss Contingencies [Line Items] |  |  |
Estimate of possible loss |  | $ 10.0 |

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