CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 113.9	$ 86.9
Due from affiliates of the General Partner	36.0	29.0
Accounts receivable	0.6	1.0
Inventories, net	5.4	5.9
Prepaid expenses and other current assets	4.9	7.8
Total current assets	160.8	130.6
Property, plant and equipment, net	224.7	214.1
Other assets	5.5	5.1
Total assets	391.0	349.8
Current liabilities:
Accounts payable and accrued expenses	33.3	27.9
Due to affiliates of the General Partner	5.6	3.7
Other current liabilities		8.0
Total current liabilities	38.9	39.6
Noncurrent liabilities	1.3	1.2
Partners' capital:
General partner's interest	62.8	43.0
Total partners' capital	350.8	309.0
Total liabilities and partners' capital	391.0	349.8
Common
Partners' capital:
Limited partners' interests	286.1	264.5
Class B Common
Partners' capital:
Limited partners' interests	$ 1.9	$ 1.5