CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Revenues	$ 2,352.9	$ 1,397.8
Costs and expenses:
Product purchases	1,973.3	1,137.5
Operating expenses	104.3	86.1
Depreciation and amortization expenses	79.6	64.0
General and administrative expenses	38.0	36.3
Other operating income	(0.7)	0
Income from operations	158.4	73.9
Other income (expense):
Interest expense, net	(33.9)	(32.1)
Equity earnings	4.9	1.6
Other	0	(0.2)
Income before income taxes	129.4	43.2
Income tax (expense) benefit:
Current	(23.9)	(9.2)
Deferred	1.4	(0.2)
Income tax expense total	(22.5)	(9.4)
Net income	106.9	33.8
Less: Net income attributable to noncontrolling interests	87.3	20.4
Net income available to common shareholders	$ 19.6	$ 13.4
Net income available per common share - basic (in dollars per share)	$ 0.47	$ 0.32
Net income available per common share - diluted (in dollars per share)	$ 0.47	$ 0.32
Weighted average shares outstanding - basic (in shares)	42.0	41.6
Weighted average shares outstanding - diluted (in shares)	42.1	42.0