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Quarterly Financial Information (Unaudited) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 29, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Quarterly Financial Information (Unaudited) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 487,715,000 |  | $ 528,854,000 |  | $ 582,282,000 |  | $ 559,690,000 |  | $ 504,006,000 |  | $ 514,165,000 |  | $ 594,099,000 |  | $ 577,668,000 |  |  |  |
Gross profit | 65,903,000 | [1] | 72,552,000 | [1] | 81,157,000 | [1] | 76,840,000 | [1] | 65,287,000 | [1] | 64,447,000 | [1] | 71,248,000 | [1] | 84,493,000 | [1] |  |  |
Consolidated net income | 15,020,000 |  | 39,993,000 | [2] | 91,842,000 | [3] | 26,434,000 |  | 16,746,000 | [4] | 15,570,000 |  | 18,540,000 |  | 32,817,000 | [5] | 173,289,000 | 83,673,000 | 87,086,000
Net income attributable to Mueller Industries, Inc. | 15,384,000 |  | 39,864,000 |  | 91,150,000 |  | 26,202,000 |  | 16,368,000 |  | 15,511,000 |  | 17,917,000 |  | 32,599,000 |  | 172,600,000 | 82,395,000 | 86,321,000
Basic earnings per share (in dollars per share) | $ 0.55 | [6] | $ 1.43 | [6] | $ 3.27 | [6] | $ 0.94 | [6] | $ 0.59 | [6] | $ 0.41 |  | $ 0.47 |  | $ 0.86 |  | $ 6.19 | $ 2.33 | $ 2.28
Diluted earnings per share (in dollars per share) | $ 0.54 | [6] | $ 1.41 | [6] | $ 3.23 | [6] | $ 0.93 | [6] | $ 0.58 | [6] | $ 0.41 |  | $ 0.47 |  | $ 0.85 |  | $ 6.11 | $ 2.31 | $ 2.26
Dividends per share (in dollars per share) | $ 0.125 |  | $ 0.125 |  | $ 0.125 |  | $ 0.125 |  | $ 0.125 |  | $ 0.10 |  | $ 0.10 |  | $ 0.10 |  | $ 0.50 | $ 0.43 | $ 0.40
Effect of LIFO Inventory Liquidation on Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |  |
Gain on insurance settlement |  |  |  |  | 106,300,000 |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |
Shares repurchased from Leucadia (in shares) |  |  |  |  |  |  |  |  | 10.4 |  |  |  |  |  |  |  |  |  |
Gain on sale of manufacturing assets |  |  | 39,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 39,765,000 | 0 | 0
Pre-tax impairment charges related to real property |  |  | 4,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement amount |  |  |  |  |  |  |  |  | $ 4,100,000 |  |  |  |  |  |  |  |  |  |
[1] | Gross profit is net sales less cost of goods sold, which excludes depreciation and amortization.
[2] | Includes $39.8 million pre-tax gain on sale of manufacturing assets and pre-tax impairment charges of $4.3 million primarily related to real property associated with the aforementioned plastics sale transaction.
[3] | Includes $106.3 million pre-tax gain from settlement of insurance claims.
[4] | Includes $4.1 million net gain from settlement of litigation.
[5] | Includes pre-tax gain of $8.0 million from liquidation of LIFO inventory layers and $1.5 million from settlement of insurance claims.
[6] | Includes the repurchase of 10.4 million shares from Leucadia in September 2012

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