CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 115.9	$ 86.9
Due from affiliates of the General Partner	28.0	29.0
Accounts receivable	0.6	1.0
Inventories, net	7.8	5.9
Prepaid expenses and other current assets	0.7	7.8
Total current assets	153.0	130.6
Property, plant and equipment, net	228.8	214.1
Other assets	6.0	5.1
Total assets	387.8	349.8
Current liabilities:
Accounts payable and accrued expenses	25.5	27.9
Due to affiliates of the General Partner	5.0	3.7
Other current liabilities	0.5	8.0
Total current liabilities	31.0	39.6
Noncurrent liabilities	0.9	1.2
Partners' capital:
General Partner's interest	65.2	43.0
Total partners' capital	355.9	309.0
Total liabilities and partners' capital	387.8	349.8
Common
Partners' capital:
Limited partners' interests	288.7	264.5
Class B Common
Partners' capital:
Limited partners' interests	$ 2.0	$ 1.5