CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Apr. 01, 2017
Statement of Comprehensive Income [Abstract]
Consolidated net income	[1]	$ 24,344	$ 30,455	[2]
Other comprehensive income (loss), net of tax:
Foreign currency translation		4,977	7,210
Net change with respect to derivative instruments and hedging activities, net of tax of $279 and $(96)		(1,062)	56
Net change in pension and postretirement obligation adjustments, net of tax of $180 and $11		(451)	40
Attributable to unconsolidated affiliates, net of tax of $116 and $903		(401)	(1,598)
Other, net		0	(144)
Total other comprehensive income, net		3,063	5,564
Consolidated comprehensive income		27,407	36,019
Comprehensive income attributable to noncontrolling interests		(393)	(1,117)
Comprehensive income attributable to Mueller Industries, Inc.		$ 27,014	$ 34,902

[1] The Condensed Consolidated Statement of Income for the quarter ended April 1, 2017 has been adjusted to reflect the adoption of ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The components of net periodic benefit cost (income) other than the service cost component are included in other income, net in the Condensed Consolidated Statements of Income. Refer to Note 1 for further discussion.

[2] The Condensed Consolidated Statement of Cash Flows for the quarter ended April 1, 2017 has been adjusted to reflect the adoption of ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The Condensed Consolidated Statements of Cash Flows reflects the changes during the periods in the total of cash, cash equivalents, and restricted cash. Therefore, restricted cash activity is included with cash when reconciling the beginning-of-period and end-of-period total amounts shown. Refer to Note 1 for further discussion.