Debt consisted of the following as of the dates indicated (in millions):

	September 30,		December 31,
	2013		2012
SHORT-TERM DEBT
Credit Facilities (1):
PAA senior secured hedged inventory facility, bearing a weighted-average interest rate of 1.6% at December 31, 2012 (2)	$	—	$	665
PAA senior unsecured revolving credit facility, bearing a weighted-average interest rate of 2.4% at December 31, 2012 (2)	—		92
PNG senior unsecured revolving credit facility, bearing a weighted-average interest rate of 2.0% and 2.1% at September 30, 2013 and December 31, 2012, respectively (3)	46		77
Commercial paper notes, bearing a weighted-average interest rate of 0.25% at September 30, 2013 (2)	319		—
5.63% senior notes due December 2013 (4)	250		250
Other	4		2
Total short-term debt	619		1,086

LONG-TERM DEBT
Senior notes, net of unamortized discounts of $15 at both September 30, 2013 and December 31, 2012 (5)	6,710		6,010
Credit Facilities and Other Long-Term Debt (1):
PNG senior unsecured revolving credit facility, bearing a weighted-average interest rate of 2.0% and 2.1% at September 30, 2013 and December 31, 2012, respectively (3)	103		105
PNG GO Bond term loans, bearing a weighted-average interest rate of 1.5% at both September 30, 2013 and December 31, 2012	200		200
Other	5		5
Total long-term debt	7,018		6,320
Total debt (2) (3) (6)	$	7,637	$	7,406

(1) In August 2013, we renewed and extended our principal bank credit facilities. See “Credit Facilities” below for further discussion.

(2) We classify as short-term certain borrowings under our commercial paper program, PAA senior unsecured revolving credit facility and PAA senior secured hedged inventory facility. These borrowings are primarily designated as working capital borrowings, must be repaid within one year and are primarily for hedged NGL and crude oil inventory and NYMEX and ICE margin deposits.

(3) PNG classifies as short-term debt any borrowings under the PNG senior unsecured revolving credit facility that have been designated as working capital borrowings and must be repaid within one year. Such borrowings are primarily related to a portion of PNG’s hedged natural gas inventory.

(4) Our $250 million 5.63% senior notes will mature in December 2013 and are thus classified as short-term at September 30, 2013 and December 31, 2012.

(5) In August 2013, we completed the issuance of $700 million, 3.85% senior notes due 2023 at a public offering price of 99.792%. Interest payments are due on April 15 and October 15 of each year, commencing on April 15, 2014.

(6) Our fixed-rate senior notes (including current maturities) had a face value of approximately $7.0 billion and $6.3 billion at September 30, 2013 and December 31, 2012, respectively. We estimated the aggregate fair value of these notes as of September 30, 2013 and December 31, 2012 to be approximately $7.5 billion and $7.3 billion, respectively. Our fixed-rate senior notes are traded among institutions, and these trades are routinely published by a reporting service. Our determination of fair value is based on reported trading activity near quarter end. We estimate that the carrying value of outstanding borrowings under our credit agreements and commercial paper program approximates fair value as interest rates reflect current market rates. The fair value estimates for our senior notes and borrowings under our credit agreements and commercial paper program are based upon observable market data and are classified within level 2 of the fair value hierarchy.