CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales:
Other income	$ 0.3	$ 0.1
Total	196.9	196.0
Cost of goods sold:
Materials, supplies and services	62.8	65.8
Gross margin	129.2	125.1
Other general and administrative expenses	1.3	0.7
Earnings from operations	124.2	120.9
Net earnings	124.2	120.9
Allocation of net earnings:
General Partner	53.1	53.2
Net earnings	124.2	120.9
Net earnings per common unit (in dollars per unit)	$ 3.78	$ 3.60
Affiliates
Net sales:
Product sales	196.5	195.8
Other income	0.1	0.1
Cost of goods sold:
Services	4.9	5.1
Selling, general and administrative services	3.7	3.5
Class B Common
Allocation of net earnings:
Common Units	1.2	1.1
Common
Allocation of net earnings:
Common Units	$ 69.9	$ 66.6