LONG-TERM DEBT

We provide detail on our long-term debt balances in the following table as of the end of the 2014 second quarter and year-end 2013:



	At Period End
($ in millions)	June 30, 2014			December 31, 2013
Senior Notes:
Series G, interest rate of 5.8%, face amount of $316, maturing November 10, 2015 (effective interest rate of 6.6%)⁽¹⁾	$	313		$	312
Series H, interest rate of 6.2%, face amount of $289, maturing June 15, 2016 (effective interest rate of 6.3%)⁽¹⁾	289			289
Series I, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)⁽¹⁾	292			292
Series K, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)⁽¹⁾	596			595
Series L, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)⁽¹⁾	349			349
Series M, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)⁽¹⁾	348			348
Commercial paper, average interest rate of 0.3% at June 30, 2014	1,086			834
$2,000 Credit Facility	—			—
Other	131			180
	3,404			3,199
Less current portion classified in:
Other current liabilities (liabilities held for sale)	—			(46		)
Current portion of long-term debt	(7		)	(6		)
	$	3,397		$	3,147


⁽¹⁾	Face amount and effective interest rate are as of June 30, 2014.

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.

We are a party to a multicurrency revolving credit agreement (the “Credit Facility”) that provides for $2,000 million of aggregate borrowings to support general corporate needs, including working capital, capital expenditures, share repurchases, and letters of credit. The availability of the Credit Facility also supports our commercial paper program. Borrowings under the Credit Facility generally 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 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. The Credit Facility expires on July 18, 2018. See the “Cash Requirements and Our Credit Facilities” caption later in this report in the “Liquidity and Capital Resources” section for information on our available borrowing capacity at June 30, 2014.

We show future principal payments for our debt as of the end of the 2014 second quarter in the following table:



Debt Principal Payments ($ in millions)	Amount
2014	$	4
2015	320
2016	297
2017	301
2018	1,095
Thereafter	1,387
Balance at June 30, 2014	$	3,404

We paid cash for interest, net of amounts capitalized, of $41 million in the 2014 first half and $46 million in the 2013 first half.