CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating Activities
Net earnings	$ 279.0	$ 249.8
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	9.2	11.6
Non-cash (gain) loss on derivatives	(2.5)	2.6
Changes in operating assets and liabilities:
Accounts receivable	(0.1)	32.5
Inventories	(2.7)	3.9
Accounts payable and accrued expenses	(2.2)	0.9
Customer advances		(57.6)
Other assets and liabilities	0.3	0.6
Net cash provided by operating activities	281.0	244.3
Investing Activities
Additions to property, plant and equipment	(11.7)	(4.9)
Changes in demand deposits with affiliates of the General Partner	6.3	(15.3)
Net cash used in investing activities	(5.4)	(20.2)
Financing Activities
Partnership distributions paid	(282.7)	(196.4)
Net cash used in financing activities	(282.7)	(196.4)
(Decrease) increase in cash and cash equivalents	(7.1)	27.7
Cash and cash equivalents at beginning of period	179.8	124.8
Cash and cash equivalents at end of period	$ 172.7	$ 152.5