Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 221.2	$ 0
Accounts receivable:
Trade, net of allowance for bad debt, respectively	53.5	0.4
Accrued revenue and other	254.8	0
Accounts Receivable, Related Parties, Current	57.5	0
Fair value of derivative assets	0.5	0
Natural gas and natural gas liquids, inventory, prepaid expenses and other	39.1	5.8
Assets held for disposition	0	72.7
Total current assets	626.6	78.9
Property and equipment, net of accumulated depreciation of $1,221.2 and $1,169.8, respectively	4,203.1	1,768.1
Derivative Asset, Noncurrent	0.5	0
Intangible assets, net of accumulated amortization of $1.7, respectively	424.9	0
Goodwill	3,821.6	401.7
Investment in limited liability company	271.4	61.1
Other Assets, net	5.7	0
Total assets	9,353.8	2,309.8
Current liabilities:
Accounts payable, drafts payable and other	58.9	1.7
Accrued gas and crude oil purchases	231.7	0
Fair value of derivative liabilities	0.9	0
Accrued Capital Expenditures	31.5	0
Contract liability	23.0	0
Other current liabilities	79.8	38.7
Accrued interest	9.8	0
Current portion of long-term debt	198.2	0
Liabilities held for disposition	0	37.0
Total current liabilities	633.8	77.4
Long-term debt	1,534.3	0
Asset Retirement Obligation	8.4	7.7
Other long-term liabilities	98.8	0
Deferred tax liability	476.8	440.9
Fair value of derivative liabilities	0.9	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	6,600.8	1,783.8
Total liabilities & members' equity	$ 9,353.8	$ 2,309.8