Condensed Consolidated Statements of Earnings (Unaudited) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Net sales $ 2,139.1 $ 1,986.2
Cost of goods sold 1,719.9 1,574.6
Gross margin 419.2 411.6
Selling, general and administrative expenses 100.4 120.0
Other operating expense 0.3 25.0
Operating earnings 318.5 266.6
Loss in value of share repurchase agreement 0 (60.0)
Interest expense, net (31.3) (26.7)
Foreign currency transaction gain 45.1 43.4
Other expense (5.6) (4.9)
Earnings from consolidated companies before income taxes 326.7 218.4
Provision for (benefit from) income taxes 30.7 (2.6)
Earnings from consolidated companies 296.0 221.0
Equity in net earnings (loss) of nonconsolidated companies (1.4) (3.3)
Net earnings including noncontrolling interests 294.6 217.7
Less: Net earnings (loss) attributable to noncontrolling interests (0.2) 0.2
Net earnings attributable to Mosaic $ 294.8 $ 217.5
Basic net earnings per share attributable to Mosaic $ 0.81 $ 0.54
Diluted net earnings per share attributable to Mosaic $ 0.80 $ 0.54
Basic weighted average number of shares outstanding 366.0 378.2
Diluted weighted average number of shares outstanding 367.9 379.6