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Revenue - Revenues by Segment and Product Type (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 100.00% | 100.00%
Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 68.00% | 69.00%
Communications [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 19.00% | 20.00%
Special Industries [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 13.00% | 11.00%
PLP-USA [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 100.00% | 100.00%
PLP-USA [Member] | Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 57.00% | 58.00%
PLP-USA [Member] | Communications [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 36.00% | 36.00%
PLP-USA [Member] | Special Industries [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 7.00% | 6.00%
The Americas [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 100.00% | 100.00%
The Americas [Member] | Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 77.00% | 77.00%
The Americas [Member] | Communications [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 19.00% | 19.00%
The Americas [Member] | Special Industries [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 4.00% | 4.00%
EMEA [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 100.00% | 100.00%
EMEA [Member] | Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 75.00% | 78.00%
EMEA [Member] | Communications [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 6.00% | 6.00%
EMEA [Member] | Special Industries [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 19.00% | 16.00%
Asia-Pacific [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 100.00% | 100.00%
Asia-Pacific [Member] | Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 70.00% | 74.00%
Asia-Pacific [Member] | Communications [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 4.00% | 5.00%
Asia-Pacific [Member] | Special Industries [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of disaggregated revenue | 26.00% | 21.00%

X
- Definition Percentage of revenue from contract with customer excluding assessed tax. + References No definition available. + Details
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Namespace Prefix: | plpc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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