Equity Method Investments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Equity method investments
Investments in and advances to affiliates	$ 853.5		$ 861.5
Summarized income statement information:
Equity in earnings of operating affiliates	9.7	15.8
Equity in earnings of non-operating affiliates—net of taxes	14.9	3.5
Operating equity method investments
Equity method investments
Investments in and advances to affiliates	376.3		377.6
Summarized income statement information:
Net sales	75.2	75.2
Net earnings	23.0	24.8
Equity in earnings of operating affiliates	9.7	15.8
Summarized balance sheet information:
Current assets	91.0		111.2
Noncurrent assets	137.2		130.5
Total assets	228.2		241.7
Current liabilities	25.8		39.4
Noncurrent liabilities	21.0		22.0
Equity	181.4		180.3
Total liabilities and equity	228.2		241.7
Non-operating equity method investments
Equity method investments
Investments in and advances to affiliates	477.2		483.9
Summarized income statement information:
Net sales	470.2	570.3
Net earnings	35.3	22.4
Equity in earnings of non-operating affiliates—net of taxes	14.9	3.5
Summarized balance sheet information:
Current assets	523.7		499.8
Noncurrent assets	281.5		298.2
Total assets	805.2		798.0
Current liabilities	287.9		290.7
Noncurrent liabilities	174.7		186.9
Equity	342.6		320.4
Total liabilities and equity	$ 805.2		$ 798.0