Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 179.8	$ 124.8
Demand deposits with General Partner affiliate	8.6	6.1
Accounts receivable	0.6	33.4
Inventories, net	22.0	27.6
Prepaid expenses and other current assets		1.2
Total current assets	211.0	193.1
Property, plant and equipment, net	77.3	83.2
Plant turnarounds, net	6.5	13.4
Other assets	5.9	7.0
Total assets	300.7	296.7
Current liabilities:
Accounts payable and accrued expenses	18.4	24.3
Customer prepayments		61.2
Other current liabilities	12.0	0.8
Total current liabilities	30.4	86.3
Noncurrent liabilities	1.0	0.4
Partners' capital:
General partner's interest	33.4	0.9
Total partners' capital	269.3	210.0
Total liabilities and partners' capital	300.7	296.7
Common
Partners' capital:
Limited partners' interests	234.8	208.5
Class B Common
Partners' capital:
Limited partners' interests	$ 1.1	$ 0.6