Long-Term Debt Outstanding

	Weighted-Average Interest		March 31,		December 31,
(in millions)	Rate as of March 31, 2013		2013		2012
Commercial paper	0.336	%	$	500	$	-
Revolving credit facilities	1.280	%		1,250		-
Senior notes with maturities of 5 years or less	4.802	%		15,787		12,991
Senior notes with maturities between 6 and 10 years	4.558	%		11,534		10,334
Senior notes with maturities greater than 10 years	6.000	%		17,922		16,801
Other, including capital lease obligations	–			233		332
Total debt	4.89	%^(a)		47,226		40,458
Less: Current portion				2,177		2,376
Long-term debt			$	45,049	$	38,082
(a) Includes the effects of our derivative financial instruments.

As of March 31, 2013, our debt had an estimated fair value of $54.3 billion. The estimated fair value of our publicly traded debt is based on quoted market values for the debt. To estimate the fair value of debt for which there are no quoted market prices, we use interest rates available to us for debt with similar terms and remaining maturities.

The Redemption Transaction resulted in an additional $4 billion aggregate principal amount of senior notes issued by NBCUniversal Enterprise and $1.25 billion of borrowings under the NBCUniversal Enterprise credit facility. The total consideration for the Redemption Transaction also included $750 million of cash funded through our commercial paper program.

The NBCUniversal Enterprise senior notes are comprised of $1.1 billion aggregate principal amount of 1.662% senior notes due 2018, $1.5 billion aggregate principal amount of 1.974% senior notes due 2019, $700 million aggregate principal amount of floating rate senior notes due 2016 and $700 million aggregate principal amount of floating rate senior notes due 2018. The floating rate senior notes due 2016 and 2018 will accrue interest for each quarterly interest period at a rate equal to three-month London Interbank Offered Rate (“LIBOR”) plus 0.537% and 0.685%, respectively.

On March 19, 2013, NBCUniversal Enterprise amended and restated the existing credit agreement of NBCUniversal to, among other things, substitute NBCUniversal Enterprise for NBCUniversal as the sole borrower and revise the borrowing capacity of the facility from $1.5 billion to $1.35 billion, extend the term of the facility to March 2018 and revise the interest rate on borrowings. The interest rate on the credit facility consists of a base rate plus a borrowing margin that is determined based on our credit rating. As of March 31, 2013, the interest rate on this credit facility was 1.28%.

In January 2013, we issued $750 million aggregate principal amount of 2.850% senior notes due 2023, $1.7 billion aggregate principal amount of 4.250% senior notes due 2033 and $500 million aggregate principal amount of 4.500% senior notes due 2043.

During the three months ended March 31, 2013, borrowings, net of repayments of commercial paper under our commercial paper program, were $500 million. Following the amendments to the NBCUniversal credit agreement, NBCUniversal's commercial paper program was terminated.

As of March 31, 2013, amounts available under our consolidated revolving credit facilities, net of amounts outstanding under our commercial paper program and undrawn letters of credit, was $5.5 billion, which included $100 million available under NBCUniversal Enterprise's credit facility.