Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 109.8	$ 68.4
Accounts receivable:
Trade, net of allowance for bad debt	76.5	139.0
Accrued revenue and other	304.2	253.3
Related party	110.2	120.8
Fair value of derivative assets	14.3	16.7
Natural gas and NGLs inventory, prepaid expenses and other	72.4	48.7
Total current assets	687.4	646.9
Property and equipment, net of accumulated depreciation of $1,500.7 and $1,422.3, respectively	5,323.4	4,934.3
Intangible assets, net of accumulated amortization of $48.2 and $36.5, respectively	877.6	533.0
Goodwill	3,710.0	3,684.7
Fair value of derivative assets	7.6	10.0
Investments in unconsolidated affiliates	267.8	270.8
Other assets, net	18.7	17.6
Total assets	10,892.5	10,097.3
Current liabilities:
Accounts payable and drafts payable	69.2	121.7
Accounts payable to related party	11.1	3.0
Accrued gas, NGLs, condensate and crude oil purchases	269.7	204.5
Fair value of derivative liabilities	3.0	3.0
Accrued interest	37.6	16.9
Other current liabilities	135.1	131.3
Total current liabilities	525.7	480.4
Long-term debt	2,493.7	2,022.5
Fair value of derivative liabilities	1.5	2.0
Asset retirement obligation	11.0	10.9
Other long-term liabilities	79.3	83.8
Deferred tax liability	543.8	526.6
Redeemable non-controlling interest	4.9	0
Members' equity (164,218,245 units issued and outstanding at March 31, 2015 and 164,055,004 units issued and outstanding at December 31, 2014) )	2,765.8	2,774.3
Non-controlling interest	4,466.8	4,196.8
Total members' equity	7,232.6	6,971.1
Commitments and Contingencies
Total liabilities and members’ equity	$ 10,892.5	$ 10,097.3