BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
Current assets
Cash	$ 1
Goodwill and other assets
Total assets	1
Common Stock, Value, Issued	1
Equity and long-term debt
Owner's net investment	1
Predecessor [Member]
Property, plant and equipment
Property, plant and equipment	4,534,074,000	4,269,377,000
Accumulated depreciation and amortization	1,489,216,000	1,442,423,000
Net property, plant and equipment (Note 6)	3,044,858,000	2,826,954,000
Current assets
Cash	3,171,000	4,040,000
Accounts receivable, net	356,988,000	260,306,000
Natural gas in storage	166,128,000	102,989,000
Regulatory assets (Note 5)	21,657,000	68,719,000
Other current assets	54,240,000	21,040,000
Total current assets	602,184,000	457,094,000
Goodwill and other assets
Regulatory assets (Note 5)	23,822,000	38,178,000
Goodwill	157,953,000	157,953,000
Other assets	17,658,000	11,153,000
Total goodwill and other assets	199,433,000	207,284,000
Total assets	3,846,475,000	3,491,332,000
Equity and long-term debt
Owner's net investment	1,239,023,000	1,154,797,000
Long-term debt, excluding current maturities	1,318,000	1,323,000
Long-term line of credit with ONEOK	1,027,631,000	1,027,631,000
Total equity	2,267,972,000	2,183,751,000
Current liabilities
Current maturities of long-term debt	6,000	206,000
Short-term note payable to ONEOK	444,960,000	294,109,000
Affiliate payables	22,403,000	21,087,000
Accounts payable	169,500,000	137,276,000
Accrued taxes other than income	32,426,000	29,977,000
Customer deposits	57,360,000	58,087,000
Other current liabilities	42,422,000	37,960,000
Total current liabilities	769,077,000	578,702,000
Deferred credits and other liabilities [Abstract]
Deferred income taxes	743,452,000	649,303,000
Other deferred credits	65,974,000	79,576,000
Total deferred credits and other liabilities	809,426,000	728,879,000
Commitments and contingencies (Note 10)
Total liabilities and equity	$ 3,846,475,000	$ 3,491,332,000