Debt and Financing Arrangements	9 Months Ended
Sep. 30, 2012
Debt and Financing Arrangement [Abstract]
DEBT AND FINANCING ARRANGEMENT	4. DEBT AND FINANCING ARRANGEMENT Credit Facility In September 2012, WPZ amended its existing $2 billion senior unsecured revolving credit facility agreement to increase its aggregate commitments by $400 million. This facility was also amended to provide an additional $400 million increase to be available under certain conditions in the future. Total letter of credit capacity available to WPZ under the $2.4 billion credit facility is $1.3 billion. At September 30, 2012, no letters of credit have been issued and no loans are outstanding under the credit facility. We may borrow up to $400 million under the credit facility to the extent not otherwise utilized by WPZ and Transcontinental Gas Pipe Line Company, LLC. At September 30, 2012, the full $400 million under the credit facility was available to us.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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