Long-Term Debt	9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt In October 2017, we amended and restated our $1.2 billion unsecured revolving credit facility due August 2018. The amendment reduced the applicable margin and extended the termination date to October 2022. The applicable margin and facility fee vary with our debt rating and are currently 1.175% and 0.20%, respectively. We have the ability to increase the capacity of the amended facility by an additional $500 million, subject to the receipt of additional or increased lender commitments, and to extend the termination date by up to two years, subject to lender consent. These amendments did not result in the extinguishment of debt.

Long-Term Debt

9 Months Ended

Sep. 30, 2017

In October 2017, we amended and restated our $1.2 billion unsecured revolving credit facility due August 2018. The amendment reduced the applicable margin and extended the termination date to October 2022. The applicable margin and facility fee vary with our debt rating and are currently 1.175% and 0.20%, respectively. We have the ability to increase the capacity of the amended facility by an additional $500 million, subject to the receipt of additional or increased lender commitments, and to extend the termination date by up to two years, subject to lender consent. These amendments did not result in the extinguishment of debt.