Summary of Significant Accounting Policies (Details) $ in Millions	12 Months Ended
	Dec. 26, 2015 USD ($) Segment shares	Dec. 27, 2014 USD ($) shares	Dec. 28, 2013 USD ($)
Basis of Presentation [Abstract]
Non-controlling ownership interest of Mueller-Xingrong	49.50%
Common Stock Split [Abstract]
Conversion ratio for stock split	2
Number of shares given as stock dividend for each outstanding share (in shares) | shares	1
Cash Equivalents [Abstract]
Temporary investments	$ 106.4	$ 144.9
Restricted cash	$ 3.7	$ 8.1
Investment in Unconsolidated Affiliate [Abstract]
Interest in the Joint Venture	50.00%
Pension and Other Postretirement Benefit Plans [Abstract]
Specified percentage over which unrecognized gains and losses are amortized	10.00%
Average remaining service period for the pension plans	9 years
Earnings Per Share [Abstract]
Stock-based awards excluded from the computation of diluted earnings per share (in shares) | shares	427,000	180,000
Foreign Currency Translation [Abstract]
Foreign currency transaction (losses) gains	$ (1.7)	$ 0.1	$ (0.1)
Change in Segment Reporting [Abstract]
Number of reportable segments | Segment	3
Recently Issued Accounting Standards [Abstract]
Deferred tax assets reclassified as non current asset	$ 24.6
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life	20 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life	40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life	20 years