Short-Term Loans	12 Months Ended
Dec. 31, 2014
Short-term Debt [Abstract]
Short-Term Loans	Short-Term Loans The Company has a $1.5 billion revolving credit facility, which was amended in February 2014, that expires in February 2019. The Company may request two one year extensions of the expiration date, the approval of which is subject to satisfaction of certain conditions. The revolving credit facility may be used for working capital, capital expenditures, share repurchases and any other lawful corporate purposes. Subject to certain terms and conditions, the Company may, on a one-time basis, request that the lenders’ commitments be increased to an aggregate amount up to $2.0 billion. Each lender in the facility may decide if it will increase its commitment. The credit facility is underwritten by a syndicate of 18 financial institutions, each of which is obligated to fund its pro-rata portion of any borrowings by the Company. The Company’s obligations under the credit facility are unsecured. The Company is not required to maintain compensating bank balances. The Company’s debt issuer credit ratings, as determined by S&P, Moody’s or Fitch Ratings Service on its non-credit-enhanced, senior unsecured long-term debt, determine the level of fees associated with its lines of credit in addition to the interest rate charged by the counterparties on any amounts borrowed against the lines of credit; the lower the Company’s debt credit rating, the higher the level of fees and borrowing rate. In February 2014, the Partnership amended its credit facility to increase the borrowing capacity to $750 million. The amended credit facility will expire in February 2019. The credit facility is available to fund working capital requirements and capital expenditures, to purchase assets, to pay distributions and repurchase units and for general partnership purposes. Provided there exists no default, and subject to certain terms and conditions, the Partnership may request that the lenders’ commitments be increased to an aggregate amount up to $1.0 billion. Each lender in the facility may decide if it will increase its commitment. The credit facility is underwritten by a syndicate of 18 financial institutions, each of which is obligated to fund its pro-rata portion of any borrowings by the Partnership. The Company is not a guarantor of the Partnership’s obligations under the credit facility. The Partnership’s obligations under the revolving portion of the credit facility are unsecured. The Partnership’s obligations under the credit facility were unconditionally guaranteed by each of the Partnership’s subsidiaries. In January 2015, the Partnership amended its credit facility to, among other things, release its subsidiaries from their guarantee obligations under the credit facility. As of December 31, 2014 and 2013, neither the Company nor the Partnership had loans or letters of credit outstanding under their respective credit facilities. The Company incurred commitment fees averaging approximately 23 basis points and 24 basis points for the years ended December 31, 2014 and 2013, respectively, to maintain credit availability under its credit facility. The Partnership incurred commitment fees averaging approximately 24 basis points and 25 basis points for the years ended December 31, 2014 and 2013, respectively, to maintain credit availability under its credit facility. The Company did not have any short-term loans outstanding at any time during the year ended December 31, 2014. The maximum amount of outstanding short-term loans at any time under the Company’s credit facility during the year ended December 31, 2013 was $178.5 million. The average daily balance of short-term loans outstanding for the Company during the year ended December 31, 2013 was approximately $12.1 million at a weighted average annual interest rate of 1.7%. The maximum amount of outstanding short-term loans at any time under the Partnership’s credit facility during the year ended December 31, 2014 was $450 million, and the average daily balance of short-term loans outstanding was approximately $119 million at a weighted average annual interest rate of 1.7%. The Partnership had no short-term loans outstanding at any time during the year ended December 31, 2013. The Company’s credit facility contains various provisions that, if not complied with, could result in termination of the credit facility, require early payment of amounts outstanding or similar actions. The most significant covenants and events of default under the Company’s credit facility relate to maintenance of a debt-to-total capitalization ratio and limitations on transactions with affiliates. The Company’s credit facility contains financial covenants that require a total debt-to-total capitalization ratio of no greater than 65%. The calculation of this ratio excludes the effects of accumulated OCI. As of December 31, 2014, the Company was in compliance with all debt provisions and covenants. The Partnership’s credit facility contains various provisions that, if not complied with, could result in termination of the credit facility, require early payment of amounts outstanding or similar actions. The covenants and events of default under the credit facility relate to maintenance of permitted leverage ratio, limitations on transactions with affiliates, limitations on restricted payments, insolvency events, nonpayment of scheduled principal or interest payments, acceleration of and certain other defaults under other financial obligations and change of control provisions. Under the credit facility, the Partnership is required to maintain a consolidated leverage ratio of not more than 5.00 to 1.00 (or not more than 5.50 to 1.00 for certain measurement periods following the consummation of certain acquisitions). As of December 31, 2014, the Partnership was in compliance with all credit facility provisions and covenants.

Short-Term Loans

The Company has a $1.5 billion revolving credit facility, which was amended in February 2014, that expires in February 2019. The Company may request two one year extensions of the expiration date, the approval of which is subject to satisfaction of certain conditions.

The revolving credit facility may be used for working capital, capital expenditures, share repurchases and any other lawful corporate purposes. Subject to certain terms and conditions, the Company may, on a one-time basis, request that the lenders’ commitments be increased to an aggregate amount up to $2.0 billion. Each lender in the facility may decide if it will increase its commitment. The credit facility is underwritten by a syndicate of 18 financial institutions, each of which is obligated to fund its pro-rata portion of any borrowings by the Company. The Company’s obligations under the credit facility are unsecured.

The Company is not required to maintain compensating bank balances. The Company’s debt issuer credit ratings, as determined by S&P, Moody’s or Fitch Ratings Service on its non-credit-enhanced, senior unsecured long-term debt, determine the level of fees associated with its lines of credit in addition to the interest rate charged by the counterparties on any amounts borrowed against the lines of credit; the lower the Company’s debt credit rating, the higher the level of fees and borrowing rate.

In February 2014, the Partnership amended its credit facility to increase the borrowing capacity to $750 million. The amended credit facility will expire in February 2019. The credit facility is available to fund working capital requirements and capital expenditures, to purchase assets, to pay distributions and repurchase units and for general partnership purposes. Provided there exists no default, and subject to certain terms and conditions, the Partnership may request that the lenders’ commitments be increased to an aggregate amount up to $1.0 billion. Each lender in the facility may decide if it will increase its commitment. The credit facility is underwritten by a syndicate of 18 financial institutions, each of which is obligated to fund its pro-rata portion of any borrowings by the Partnership. The Company is not a guarantor of the Partnership’s obligations under the credit facility. The Partnership’s obligations under the revolving portion of the credit facility are unsecured. The Partnership’s obligations under the credit facility were unconditionally guaranteed by each of the Partnership’s subsidiaries. In January 2015, the Partnership amended its credit facility to, among other things, release its subsidiaries from their guarantee obligations under the credit facility.

As of December 31, 2014 and 2013, neither the Company nor the Partnership had loans or letters of credit outstanding under their respective credit facilities. The Company incurred commitment fees averaging approximately 23 basis points and 24 basis points for the years ended December 31, 2014 and 2013, respectively, to maintain credit availability under its credit facility. The Partnership incurred commitment fees averaging approximately 24 basis points and 25 basis points for the years ended December 31, 2014 and 2013, respectively, to maintain credit availability under its credit facility.

The Company did not have any short-term loans outstanding at any time during the year ended December 31, 2014. The maximum amount of outstanding short-term loans at any time under the Company’s credit facility during the year ended December 31, 2013 was $178.5 million. The average daily balance of short-term loans outstanding for the Company during the year ended December 31, 2013 was approximately $12.1 million at a weighted average annual interest rate of 1.7%. The maximum amount of outstanding short-term loans at any time under the Partnership’s credit facility during the year ended December 31, 2014 was $450 million, and the average daily balance of short-term loans outstanding was approximately $119 million at a weighted average annual interest rate of 1.7%. The Partnership had no short-term loans outstanding at any time during the year ended December 31, 2013.

The Company’s credit facility contains various provisions that, if not complied with, could result in termination of the credit facility, require early payment of amounts outstanding or similar actions. The most significant covenants and events of default under the Company’s credit facility relate to maintenance of a debt-to-total capitalization ratio and limitations on transactions with affiliates. The Company’s credit facility contains financial covenants that require a total debt-to-total capitalization ratio of no greater than 65%. The calculation of this ratio excludes the effects of accumulated OCI. As of December 31, 2014, the Company was in compliance with all debt provisions and covenants.

The Partnership’s credit facility contains various provisions that, if not complied with, could result in termination of the credit facility, require early payment of amounts outstanding or similar actions. The covenants and events of default under the credit facility relate to maintenance of permitted leverage ratio, limitations on transactions with affiliates, limitations on restricted payments, insolvency events, nonpayment of scheduled principal or interest payments, acceleration of and certain other defaults under other financial obligations and change of control provisions. Under the credit facility, the Partnership is required to maintain a consolidated leverage ratio of not more than 5.00 to 1.00 (or not more than 5.50 to 1.00 for certain measurement periods following the consummation of certain acquisitions). As of December 31, 2014, the Partnership was in compliance with all credit facility provisions and covenants.