Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities:
Net earnings	$ 306.9	$ 370.0	$ 502.4
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	35.8	23.5	19.3
Unrealized loss (gain) on derivatives	24.3	11.4	(8.6)
Loss (gain) on disposal of property, plant and equipment	2.0	0.0	(0.4)
Changes in operating assets and liabilities:
Accounts receivable	(0.4)	0.6	(0.4)
Inventories	(1.1)	(3.7)	(0.2)
Accounts payable and accrued expenses	(6.7)	3.1	(0.7)
Due to/from affiliates of the General Partner	15.1	4.4	(25.3)
Other assets and liabilities	(0.8)	(4.0)	2.8
Net cash provided by operating activities	375.1	405.3	488.9
Investing Activities:
Additions to property, plant and equipment	(87.8)	(67.1)	(99.6)
Proceeds from Sale of Property, Plant, and Equipment	0.9	0.0	0.0
Proceeds from Collection of Advance to Affiliate	0.0	0.0	5.4
Net cash used in investing activities	(86.9)	(67.1)	(94.2)
Financing Activities:
Payments of distributions to affiliates	(294.8)	(304.1)	(465.2)
Other	0.0	(8.0)	8.0
Net cash used in financing activities	(294.8)	(312.1)	(457.2)
(Decrease) increase in cash and cash equivalents	(6.6)	26.1	(62.5)
Cash and cash equivalents at beginning of year	113.0	86.9	149.4
Cash and cash equivalents at end of year	$ 106.4	$ 113.0	$ 86.9