Debt and Financing Arrangements	6 Months Ended
Jun. 30, 2013
Debt and Financing Arrangement [Abstract]
DEBT AND FINANCING ARRANGEMENT	3. DEBT AND FINANCING ARRANGEMENT Credit Facility Total letter of credit capacity available to WPZ under the $2.4 billion credit facility is $1.3 billion. At June 30, 2013, 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 (Transco). At June 30, 2013, the full $400 million under the credit facility was available to us. On July 31, 2013, WPZ amended the $2.4 billion credit facility to increase the aggregate commitments to $2.5 billion and extend the maturity date to July 31, 2018. The amended credit facility may also, under certain conditions, be increased by up to an additional $500 million. We may borrow up to $500 million under the amended credit facility to the extent not otherwise utilized by WPZ and Transco. WPZ participates in a commercial paper program, and WPZ management considers amounts outstanding under this program to be a reduction of available capacity under the credit facility. At June 30, 2013, WPZ had $710 million in outstanding commercial paper.

- 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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