CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales:
Other income	$ 0.1	$ 0.2	$ 0.4	$ 0.5
Total	167.5	215.4	345.2	439.5
Cost of goods sold:
Materials, supplies and services	57.4	55.6	122.0	102.2
Gross margin	104.2	153.7	211.7	325.6
Other general and administrative expenses	0.3	0.7	1.0	2.0
Earnings from operations	100.1	149.3	203.0	316.1
Net earnings	100.1	149.3	203.0	316.1
Allocation of net earnings:
General Partner	40.7	63.8	82.2	136.8
Net earnings	100.1	149.3	203.0	316.1
Net earnings per Common Unit (in dollars per unit)	$ 3.16	$ 4.54	$ 6.42	$ 9.52
Affiliates
Net sales:
Product sales	167.2	215.0	344.5	438.7
Other income	0.2	0.2	0.3	0.3
Cost of goods sold:
Services provided by the affiliates of the General Partner	5.9	6.1	11.5	11.7
Selling, general and administrative services provided by the affiliates of the General Partner	3.8	3.7	7.7	7.5
Class B Common
Allocation of net earnings:
Common Units	1.0	1.5	2.0	3.1
Common
Allocation of net earnings:
Common Units	$ 58.4	$ 84.0	$ 118.8	$ 176.2