CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Revenues:
Transportation	$ 289.6	$ 304.3
Parking and lending	2.8	9.2
Storage	19.3	28.8
Other	18.0	14.6
Total operating revenues	329.7	356.9
Operating Costs and Expenses:
Fuel and transportation	27.0	33.0
Operation and maintenance	42.4	42.7
Administrative and general	30.6	26.8
Depreciation and amortization	81.6	69.2
Asset impairment	0.1	7.2
Net gain on sale of operating assets	0	(0.4)
Taxes other than income taxes	25.2	25.8
Total operating costs and expenses	206.9	204.3
Operating income	122.8	152.6
Other Deductions (Income):
Interest expense	45.2	40.9
Interest income	(0.1)	(0.1)
Equity losses in unconsolidated affiliates	0	86.1
Miscellaneous other income	(0.2)	(0.1)
Total other deductions	44.9	126.8
Income before income taxes	77.9	25.8
Income taxes	0.2	0.2
Net income	77.7	25.6
Net loss attributable to noncontrolling interests	0	(84.6)
Net income attributable to controlling interests	$ 77.7	$ 110.2