XML 72 R60.htm IDEA: XBRL DOCUMENT v2.4.0.6
CREDIT FACILITIES AND SHORT-TERM NOTES PAYABLE (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
ONEOK Credit Agreement [Member]
   
Line of Credit Facility [Line Items]    
Annual Fee Description The annual facility fee is 25 basis points based on our current credit rating.  
Interest Rate Description Borrowings, if any, will accrue at LIBOR plus 150 basis points.  
Expiration date April 2016  
Maximum debt-to-capital ratio (in hundredths) 67.50%  
Current debt-to-capital ratio 52.20%  
Commercial paper $ 817,200,000  
Letters of credit issued 1,900,000  
Remaining available borrowing capacity to meet liquidity needs 380,900,000  
Weighted-average interest rate on short-term debt outstanding (in hundredths) 0.46% 0.50%
Maximum borrowing capacity 1,200,000,000  
Option to increase borrowing capacity 1,700,000,000  
ONEOK Partners Credit Agreement [Member]
   
Line of Credit Facility [Line Items]    
Annual Fee Description The annual facility fee is 20 basis points based on ONEOK Partners current credit rating.  
Interest Rate Description Borrowings, if any, will accrue at LIBOR plus 130 basis points.  
Expiration date August 1, 2017  
Indebtedness To Adjusted Ebitda Maximum 5.0 to 1  
Indebtedness To Adjusted Ebitda From Acquisitions Maximum 5.5 to 1  
Indebtedness To Adjusted Ebitda Current 3.0 to 1  
Acquisition price threshold for increase in permitted debt to EBITDA covenant ratio 25,000,000  
Partnership Credit Agreement sublimit for issuance of standby letters of credit 100,000,000  
Maximum borrowing capacity 1,200,000,000  
Option to increase borrowing capacity $ 1,700,000,000