Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Segment Division	Mar. 31, 2013	Dec. 31, 2013
Segment Information [Abstract]
Number of divisions	2
Number of reportable segments	4
Segment Reporting Information [Line Items]
Sale of commodities	$ 2,144.8	$ 1,283.7
Fees from midstream services	208.1	114.1
Revenues	2,352.9	1,397.8
Operating Margin	275.3	174.2
Total assets	6,055.2	5,148.5	6,048.6
Capital Expenditures	175.4	206.9
Depreciation and amortization expenses	(79.6)	(64.0)
General and administrative expenses	(38.0)	(36.3)
Interest expense, net	(33.9)	(32.1)
Other, net	5.6	1.4
Income tax expense	(22.5)	(9.4)
Net income	106.9	33.8
Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Revenues	488.1	332.2
Operating Margin	94.1	53.8
Total assets	3,275.1	2,854.7
Capital Expenditures	98.9	96.1
Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Revenues	285.2	230.3
Operating Margin	26.1	23.5
Total assets	385.1	416.3
Capital Expenditures	4.3	6.5
Logistics Assets [Member]
Segment Reporting Information [Line Items]
Revenues	155.9	117.5
Operating Margin	96.6	56.3
Total assets	1,568.7	1,210.7
Capital Expenditures	68.6	103.7
Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Revenues	2,213.3	1,291.4
Operating Margin	64.6	34.0
Total assets	614.1	436.9
Capital Expenditures	3.1	0
Other Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(6.1)	6.6
Operating Margin	(6.1)	6.6
Total assets	4.5	21.4
Capital Expenditures	0	0
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(783.5)	(580.2)
Operating Margin	0	0
Total assets	128.8	134.2
Capital Expenditures	0.5	0.6
TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Operating Margin	0	0
Total assets	78.9	74.3
Capital Expenditures	0	0
Natural gas sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	392.6	255.3
NGL sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	1,710.6	963.5
Condensate sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	28.4	27.1
Petroleum Products [Member]
Segment Reporting Information [Line Items]
Sale of commodities	20.1	31.3
Derivative activities [Member]
Segment Reporting Information [Line Items]
Sale of commodities	(6.9)	6.5
Fractionating and treating fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	46.5	27.2
Storage And Terminaling Fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	99.6	60.2
Gathering and processing fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	42.6	18.5
Total Other Revenues [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	19.4	8.2
Total outside Revenues [Member]
Segment Reporting Information [Line Items]
Sale of commodities	2,144.8	1,283.7
Fees from midstream services	208.1	114.1
Revenues	2,352.9	1,397.8
Total outside Revenues [Member] | Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	45.8	38.1
Fees from midstream services	40.8	20.2
Revenues	86.6	58.3
Total outside Revenues [Member] | Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	100.5	69.6
Fees from midstream services	7.7	8.8
Revenues	108.2	78.4
Total outside Revenues [Member] | Logistics Assets [Member]
Segment Reporting Information [Line Items]
Sale of commodities	21.0	32.9
Fees from midstream services	68.1	47.1
Revenues	89.1	80.0
Total outside Revenues [Member] | Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Sale of commodities	1,983.7	1,136.5
Fees from midstream services	91.3	38.0
Revenues	2,075.0	1,174.5
Total outside Revenues [Member] | Other Segment [Member]
Segment Reporting Information [Line Items]
Sale of commodities	(6.1)	6.6
Fees from midstream services	0	0
Revenues	(6.1)	6.6
Total outside Revenues [Member] | Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Sale of commodities	(0.1)	0
Fees from midstream services	0.2	0
Revenues	0.1	0
Total outside Revenues [Member] | TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0	0
Fees from midstream services	0	0
Revenues	0	0
Total Intersegment Revenues [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0	0
Fees from midstream services	0	0
Revenues	0	0
Total Intersegment Revenues [Member] | Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	400.4	273.0
Fees from midstream services	1.1	0.9
Revenues	401.5	273.9
Total Intersegment Revenues [Member] | Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	177.0	151.9
Fees from midstream services	0	0
Revenues	177.0	151.9
Total Intersegment Revenues [Member] | Logistics Assets [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.6	0.9
Fees from midstream services	66.2	36.6
Revenues	66.8	37.5
Total Intersegment Revenues [Member] | Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Sale of commodities	130.4	110.5
Fees from midstream services	7.9	6.4
Revenues	138.3	116.9
Total Intersegment Revenues [Member] | Other Segment [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0	0
Fees from midstream services	0	0
Revenues	0	0
Total Intersegment Revenues [Member] | Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Sale of commodities	(708.4)	(536.3)
Fees from midstream services	(75.2)	(43.9)
Revenues	(783.6)	(580.2)
Total Intersegment Revenues [Member] | TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0	0
Fees from midstream services	0	0
Revenues	$ 0	$ 0