Partnership Capital and Distributions	6 Months Ended
Jun. 30, 2014
Partnership Capital and Distributions	2. Partnership Capital and Distributions The partnership agreement requires that, within 45 days subsequent to the end of each quarter, the Partnership distributes all of its available cash (as defined in the partnership agreement) to unitholders of record on the applicable record date. During the three and six-month periods ended June 30, 2014, the Partnership paid cash distributions to its unitholders of approximately $130.0 million and $252.1 million, respectively, representing a $0.555 per common unit distribution for the three-month period ended December 31, 2013 and a $0.575 per common unit distribution for the three-month period ended March 31, 2014. Please read Note 12 (Subsequent Events) to the condensed consolidated financial statements, concerning distributions declared on July 24, 2014, for the three-month period ended June 30, 2014. General Partner Interest and Incentive Distribution Rights The Partnership’s general partner is entitled to two percent of all quarterly distributions that the Partnership makes prior to its liquidation. The general partner has the right, but not the obligation, to contribute a proportionate amount of capital to the Partnership to maintain its current general partner interest. The general partner’s two percent interest in the Partnership’s distributions may be reduced if the Partnership issues additional limited partner interests in the future (other than the issuance of common units upon conversion of outstanding Class B units or the issuance of common units upon a reset of the incentive distribution rights (“IDRs”)) and its general partner does not contribute a proportionate amount of capital to the Partnership to maintain its two percent general partner interest. The general partner holds IDRs that entitle it to receive increasing percentages, up to a maximum of 50 percent, of Partnership cash distributions if any of the Partnership’s quarterly distributions exceed a specified threshold. The maximum distribution sharing percentage of 50 percent includes distributions paid to the general partner on its two percent general partner interest and assumes that the general partner maintains its general partner interest at two percent. The maximum distribution of 50 percent does not include any distributions that the general partner may receive on the limited partner interests that it may acquire. Conversion of Subordinated Units Upon payment of the cash distribution for the second quarter of 2013, the subordination period with respect to the Partnership’s 69,076,122 subordinated units expired and all outstanding subordinated units converted into common units on a one-for-one basis on August 15, 2013. The conversion did not impact the amount of the cash distribution paid or the total number of the Partnership’s outstanding units representing limited partner interests. Conversion of Class C Units Under the partnership agreement, the Class C units became convertible into common units on a one-for-one basis at the election of either the Partnership or the holders of the Class C units on February 10, 2014 (the first business day following the record date for the Partnership’s 2013 fourth quarter cash distribution). After February 10, 2014, the Partnership received notice from certain of the GIP II Entities and Williams, as holders of the Class C units, of their election to convert all of the Class C units. All of the outstanding Class C units were converted into common units on a one-for-one basis effective February 19, 2014. The common units resulting from this conversion participate pro rata with the other common units in quarterly distributions. The conversion did not impact the amount of cash distributions paid or the total number of the Partnership’s outstanding units representing limited partner interests. Class B Units The Class B units are not entitled to cash distributions. Instead, prior to conversion into common units, the Class B units receive quarterly distributions of additional paid-in-kind Class B units. The amount of each quarterly distribution per Class B unit is the quotient of the quarterly distribution paid to the Partnership’s common units divided by the volume-weighted average price of the common units for the 30-day period prior to the declaration of the quarterly distribution to common units. Effective on the business day after the record date for the distribution on common units for the fiscal quarter ending December 31, 2014, each Class B unit will become convertible at the election of either the Partnership or the holders of such Class B unit into a common unit on a one-for-one basis. In the event of the Partnership’s liquidation, the holders of Class B units will be entitled to receive out of the Partnership’s assets available for distribution to the partners the positive balance in each such holder’s capital account in respect of such Class B units, determined after allocating the Partnership’s net income or net loss among the partners. All Class B units are held indirectly by affiliates of the Partnership’s general partner. The Class B units were issued at a discount to the market price of the common units into which they are convertible. This discount totaled $58.3 million and represents a beneficial conversion feature, which was reflected as an increase in common unitholders’ capital and a decrease in Class B unitholders’ capital to reflect the fair value of the Class B units at issuance. The beneficial conversion feature is considered a non-cash distribution recognized ratably from the issuance date of December 20, 2012, through the conversion date, resulting in an increase in Class B unitholders’ capital and a decrease in common unitholders’ capital.

2. Partnership Capital and Distributions

The partnership agreement requires that, within 45 days subsequent to the end of each quarter, the Partnership distributes all of its available cash (as defined in the partnership agreement) to unitholders of record on the applicable record date. During the three and six-month periods ended June 30, 2014, the Partnership paid cash distributions to its unitholders of approximately $130.0 million and $252.1 million, respectively, representing a $0.555 per common unit distribution for the three-month period ended December 31, 2013 and a $0.575 per common unit distribution for the three-month period ended March 31, 2014. Please read Note 12 (Subsequent Events) to the condensed consolidated financial statements, concerning distributions declared on July 24, 2014, for the three-month period ended June 30, 2014.

General Partner Interest and Incentive Distribution Rights

The Partnership’s general partner is entitled to two percent of all quarterly distributions that the Partnership makes prior to its liquidation. The general partner has the right, but not the obligation, to contribute a proportionate amount of capital to the Partnership to maintain its current general partner interest. The general partner’s two percent interest in the Partnership’s distributions may be reduced if the Partnership issues additional limited partner interests in the future (other than the issuance of common units upon conversion of outstanding Class B units or the issuance of common units upon a reset of the incentive distribution rights (“IDRs”)) and its general partner does not contribute a proportionate amount of capital to the Partnership to maintain its two percent general partner interest.

The general partner holds IDRs that entitle it to receive increasing percentages, up to a maximum of 50 percent, of Partnership cash distributions if any of the Partnership’s quarterly distributions exceed a specified threshold. The maximum distribution sharing percentage of 50 percent includes distributions paid to the general partner on its two percent general partner interest and assumes that the general partner maintains its general partner interest at two percent. The maximum distribution of 50 percent does not include any distributions that the general partner may receive on the limited partner interests that it may acquire.

Conversion of Subordinated Units

Upon payment of the cash distribution for the second quarter of 2013, the subordination period with respect to the Partnership’s 69,076,122 subordinated units expired and all outstanding subordinated units converted into common units on a one-for-one basis on August 15, 2013. The conversion did not impact the amount of the cash distribution paid or the total number of the Partnership’s outstanding units representing limited partner interests.

Conversion of Class C Units

Under the partnership agreement, the Class C units became convertible into common units on a one-for-one basis at the election of either the Partnership or the holders of the Class C units on February 10, 2014 (the first business day following the record date for the Partnership’s 2013 fourth quarter cash distribution). After February 10, 2014, the Partnership received notice from certain of the GIP II Entities and Williams, as holders of the Class C units, of their election to convert all of the Class C units. All of the outstanding Class C units were converted into common units on a one-for-one basis effective February 19, 2014. The common units resulting from this conversion participate pro rata with the other common units in quarterly distributions. The conversion did not impact the amount of cash distributions paid or the total number of the Partnership’s outstanding units representing limited partner interests.

Class B Units

The Class B units are not entitled to cash distributions. Instead, prior to conversion into common units, the Class B units receive quarterly distributions of additional paid-in-kind Class B units. The amount of each quarterly distribution per Class B unit is the quotient of the quarterly distribution paid to the Partnership’s common units divided by the volume-weighted average price of the common units for the 30-day period prior to the declaration of the quarterly distribution to common units. Effective on the business day after the record date for the distribution on common units for the fiscal quarter ending December 31, 2014, each Class B unit will become convertible at the election of either the Partnership or the holders of such Class B unit into a common unit on a one-for-one basis. In the event of the Partnership’s liquidation, the holders of Class B units will be entitled to receive out of the Partnership’s assets available for distribution to the partners the positive balance in each such holder’s capital account in respect of such Class B units, determined after allocating the Partnership’s net income or net loss among the partners. All Class B units are held indirectly by affiliates of the Partnership’s general partner. The Class B units were issued at a discount to the market price of the common units into which they are convertible. This discount totaled $58.3 million and represents a beneficial conversion feature, which was reflected as an increase in common unitholders’ capital and a decrease in Class B unitholders’ capital to reflect the fair value of the Class B units at issuance. The beneficial conversion feature is considered a non-cash distribution recognized ratably from the issuance date of December 20, 2012, through the conversion date, resulting in an increase in Class B unitholders’ capital and a decrease in common unitholders’ capital.