Commitments and Contingencies (Details) $ in Thousands, € in Millions, $ in Millions					1 Months Ended					3 Months Ended		12 Months Ended	291 Months Ended
	Mar. 13, 2018 CAD ($)	Apr. 02, 2014 EUR (€)	Aug. 01, 2012 USD ($)	Jul. 05, 2011 affiliate	Dec. 31, 2017 USD ($) Cases	Jun. 30, 2017 USD ($)	Jan. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Oct. 29, 2014 USD ($)	Mar. 30, 2018 USD ($) Defendants Cases	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Cases	Mar. 30, 2018 USD ($) Defendants Cases
Loss Contingencies [Line Items]
Environmental-related accrued liabilities					$ 4,700					$ 4,700		$ 4,700	$ 4,700
Period of being in asbestos litigation										30 years
Non-maritime cases against company | Cases										238			238
Number of cases proceed to verdict | Cases										0			0
Claims settled and dismissed, number | Cases												51,069
Pending claims, number | Cases					238							238
Damages sought, value										$ 354,000
Number of defendants | Defendants										50			50
Punitive damages, value										$ 255,000
Accrual related to maritime and non-maritime cases, gross amount										1,000		$ 1,200
Insurance recoveries related to lawsuits										100		100
Accrual related to maritime and non-maritime cases, net amount					$ 1,100					900		1,100	$ 900
Aggregate settlement costs					10,500					10,600		10,500	10,600
Settlement costs										100	$ 100
Aggregate litigation expense, amount					29,200					29,500		$ 29,200	29,500
Legal fees										300	300
Income tax expense (benefit)										4,600	$ 6,300
Minimum rental payments required under non-cancelable lease agreement for remaining year 1										15,900			15,900
Minimum rental payments required under non-cancelable lease agreement for year 2										12,800			12,800
Minimum rental payments required under non-cancelable lease agreement for year 3										10,000			10,000
Minimum rental payments required under non-cancelable lease agreement for year 4										7,100			7,100
Minimum rental payments required under non-cancelable lease agreement for year 5										4,800			4,800
Minimum rental payments required under non-cancelable lease agreement thereafter										9,300			9,300
Letters of credit										41,700			41,700
Performance bonds										169,700			169,700
Other guarantees										$ 128,400			$ 128,400
Europe
Loss Contingencies [Line Items]
Number of affiliates engaged in violations | affiliate				2
Silec
Loss Contingencies [Line Items]
Damages sought, value | €		€ 1.9
Period of participation in underground power cables businesses				10 months
SEC and DOJ | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Disgorge estimated profits, incremental aggregate amount								$ 82,300
DOJ | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Penalties							$ 20,500
SEC | Investigation Related to Financial Restatements
Loss Contingencies [Line Items]
Penalties					$ 30,900	$ 18,500	$ 12,400
Monetary Damages
Loss Contingencies [Line Items]
Pending claims, number | Cases										82			82
Number of cases | Cases										188			188
Damages sought, value	$ 57.5
Allege Only Damages
Loss Contingencies [Line Items]
Number of cases | Cases										106			106
Amount per plaintiff										$ 93			$ 93
Infractions Including Potential Interest and Penalties | Brazil
Loss Contingencies [Line Items]
Income tax expense (benefit)			$ 8,000
Summons to recover contested incentives									$ 8,000
Infractions Including Potential Interest and Penalties | Brazil | Minimum
Loss Contingencies [Line Items]
Range of possible loss										0			0
Infractions Including Potential Interest and Penalties | Brazil | Maximum
Loss Contingencies [Line Items]
Range of possible loss										8,000			$ 8,000
Disputed Credits, Including Potential Interest and Penalties | Brazil
Loss Contingencies [Line Items]
Income tax expense (benefit)										$ 22,000
Asbestos Issue
Loss Contingencies [Line Items]
New claims filed, number | Cases										16		63
Claims settled and dismissed, number | Cases										25			51,094