Long-term Debt

We provide detail on our long-term debt balances in the following table as of the end of the 2013 first quarter and year-end 2012:



	At Period End
($ in millions)	March 31, 2013			December 28, 2012
Senior Notes:
Series G, interest rate of 5.810%, face amount of $316, maturing November 10, 2015 (effective interest rate of 6.58%)⁽¹⁾	$	310		$	309
Series H, interest rate of 6.200%, face amount of $289, maturing June 15, 2016 (effective interest rate of 6.35%)⁽¹⁾	289			289
Series I, interest rate of 6.375%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.51%)⁽¹⁾	292			292
Series J, matured February 15, 2013	—			400
Series K, interest rate of 3.000%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.17%)⁽¹⁾	595			594
Series L, interest rate of 3.250%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.32%)⁽¹⁾	349			349
Commercial paper, average interest rate of 0.3781% at March 31, 2013	1,238			501
$1,750 Credit Facility	—			15
Other	182			186
	3,255			2,935
Less current portion	(49		)	(407		)
	$	3,206		$	2,528


⁽¹⁾	Face amount and effective interest rate are as of March 31, 2013.

All of our long-term debt was, and to the extent currently outstanding is, recourse to us but unsecured. Other debt in the preceding table includes capital leases, among other items.

In the 2013 first quarter, we made a $411 million cash payment of principal and interest to retire, at maturity, all of our outstanding Series J Notes.

We are party to a multicurrency revolving credit agreement (the “Credit Facility”) that provides for $1,750 million of aggregate borrowings to support general corporate needs, including working capital, capital expenditures, and letters of credit. The Credit Facility expires on June 23, 2016. The availability of the Credit Facility also supports our commercial paper program. Borrowings under the Credit Facility bear interest at LIBOR (the London Interbank Offered Rate) plus a spread, based on our public debt rating. We also pay quarterly fees on the Credit Facility at a rate also based on our public debt rating. While any outstanding commercial paper borrowings and/or borrowings under our Credit Facility generally have short-term maturities, we classify the outstanding borrowings as long-term based on our ability and intent to refinance the outstanding borrowings on a long-term basis.

We show future principal payments for our debt as of the end of the 2013 first quarter in the following table :



Debt Principal Payments ($ in millions)	Amount
2013	$	48
2014	7
2015	317
2016	1,535
2017	300
Thereafter	1,048
Balance at March 31, 2013	$	3,255

We paid cash for interest, net of amounts capitalized, of $21 million in the 2013 first quarter and $10 million in the 2012 first quarter.