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Revenue - Revenues by Segment and Product Type (Detail)	3 Months Ended		9 Months Ended
Revenue - Revenues by Segment and Product Type (Detail)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	60.00%	63.00%	61.00%	66.00%
Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	31.00%	25.00%	30.00%	24.00%
Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	9.00%	12.00%	9.00%	10.00%
PLP-USA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
PLP-USA [Member] \| Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	59.00%	60.00%	59.00%	63.00%
PLP-USA [Member] \| Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	36.00%	34.00%	36.00%	31.00%
PLP-USA [Member] \| Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	5.00%	6.00%	5.00%	6.00%
The Americas [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
The Americas [Member] \| Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	64.00%	80.00%	68.00%	78.00%
The Americas [Member] \| Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	33.00%	16.00%	28.00%	17.00%
The Americas [Member] \| Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	3.00%	4.00%	4.00%	5.00%
EMEA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
EMEA [Member] \| Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	52.00%	59.00%	54.00%	58.00%
EMEA [Member] \| Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	42.00%	35.00%	40.00%	35.00%
EMEA [Member] \| Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	6.00%	6.00%	6.00%	7.00%
Asia-Pacific [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%	100.00%	100.00%
Asia-Pacific [Member] \| Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	70.00%	60.00%	70.00%	69.00%
Asia-Pacific [Member] \| Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	3.00%	4.00%	3.00%	4.00%
Asia-Pacific [Member] \| Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	27.00%	36.00%	27.00%	27.00%