Debt

Debt consists of the following:



	September 30, 2015					December 31, 2014
(millions, except percentages)	Debt			Interest Rate		Debt			Interest Rate
Credit Facility, due August 27, 2020	$	—		—	%	$	—		—	%
Capital Lease and Other Obligations	424			—	%	413			—	%
8.25% Senior Notes, due March 1, 2019	1,000			8.25	%	1,000			8.25	%
5.625% Senior Notes, due May 1, 2021	693			5.625	%	—			—	%
4.15% Senior Notes, due December 15, 2021	1,000			4.15	%	1,000			4.15	%
5.875% Senior Notes, due June 1, 2022	597			5.875	%	—			—	%
7.25% Senior Notes, due October 15, 2023	100			7.25	%	100			7.25	%
5.875% Senior Notes, due June 1, 2024	499			5.875	%	—			—	%
3.90% Senior Notes, due November 15, 2024	650			3.90	%	650			3.90	%
8.00% Senior Notes, due April 1, 2027	250			8.00	%	250			8.00	%
6.00% Senior Notes, due March 1, 2041	850			6.00	%	850			6.00	%
5.25% Senior Notes, due November 15, 2043	1,000			5.25	%	1,000			5.25	%
5.05% Senior Notes, due November 15, 2044	850			5.05	%	850			5.05	%
7.25% Senior Debentures, due August 1, 2097	84			7.25	%	84			7.25	%
Total	7,997					6,197
Unamortized Discount	(25		)			(26		)
Unamortized Premium	118					—
Total Debt, Net of Unamortized Discount and Premium	8,090					6,171
Less Amounts Due Within One Year
Capital Lease Obligations	(57		)			(68		)
Long-Term Debt Due After One Year	$	8,033				$	6,103

Credit Facility Our Credit Agreement provides for a $4.0 billion unsecured revolving credit facility (Credit Facility), which is available for general corporate purposes. The Credit Facility (i) provides for facility fee rates that range from 10 basis points to 25 basis points per year depending upon our credit rating, (ii) includes sub-facilities for short-term loans and letters of credit up to an aggregate amount of $500 million under each sub-facility and (iii) provides for interest rates that are based upon the Eurodollar rate plus a margin that ranges from 90 basis points to 150 basis points depending upon our credit rating. On August 27, 2015, we entered into the Second Amendment to Credit Agreement (Second Amendment) with JPMorgan Chase Bank, N.A., as administrative agent, and the other commercial lending institutions party thereto. The Second Amendment extended the maturity date of the Credit Agreement, among other things, from October 3, 2018 to August 27, 2020.

Debt Exchange On July 29, 2015, we completed our debt exchange offers to exchange all validly tendered and accepted senior notes assumed in the Rosetta Merger. We were able to exchange 99.4% of the outstanding Rosetta senior notes, whereby we issued (i) $693 million senior unsecured 5.625% notes due May 1, 2021, (ii) $597 million senior unsecured 5.875% notes due June 1, 2022 and (iii) $499 million senior unsecured 5.875% notes due June 1, 2024.

See Note 8. Fair Value Measurements and Disclosures for a discussion of methods and assumptions used to estimate the fair values of debt.