CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues:
Transportation	$ 255.6	$ 238.9	$ 802.1	$ 788.9
Parking and lending	2.3	3.0	7.9	21.4
Storage	20.4	19.2	60.6	70.1
Other	15.8	17.8	51.8	48.8
Total operating revenues	294.1	278.9	922.4	929.2
Operating Costs and Expenses:
Fuel and transportation	23.9	31.9	74.5	94.8
Operation and maintenance	55.2	50.3	152.2	136.9
Administrative and general	31.7	31.8	94.1	89.1
Depreciation and amortization	79.8	72.2	242.4	211.0
Asset impairment	0.0	0.0	0.1	8.6
Net (gain) loss on disposal of operating assets	(0.1)	0.1	(0.2)	(1.1)
Taxes other than income taxes	22.9	24.1	69.9	72.3
Total operating costs and expenses	213.4	210.4	633.0	611.6
Operating income	80.7	68.5	289.4	317.6
Other Deductions (Income):
Interest expense	43.1	40.0	134.2	121.1
Interest income	(0.1)	(0.1)	(0.3)	(0.4)
Equity losses in unconsolidated affiliates	0.0	0.3	0.0	86.9
Miscellaneous other income, net	(0.7)	(0.2)	(1.3)	(0.3)
Total other deductions	42.3	40.0	132.6	207.3
Income before income taxes	38.4	28.5	156.8	110.3
Income taxes	0.1	0.1	0.4	0.4
Net income	38.3	28.4	156.4	109.9
Net loss attributable to noncontrolling interests	0.0	(0.8)	0.0	(86.9)
Net income attributable to controlling interests	$ 38.3	$ 29.2	$ 156.4	$ 196.8
Net Income per Unit:
Net income per common unit (in units)	$ 0.15	$ 0.12	$ 0.62	$ 0.79
Weighted-average number of common units outstanding (in units)	250.3	243.3	248.3	243.3
Cash distribution declared and paid to common units (in units)	$ 0.10	$ 0.10	$ 0.30	$ 0.30