

Debt	March 31,		September 30,
(in millions)	2012		2011
Senior Notes and Debentures:
Senior notes due September 2014, 4.375%	$	598	$	597
Senior notes due February 2015, 1.250%		499		-
Senior notes due September 2015, 4.250%		250		250
Senior notes due April 2016, 6.250%		916		916
Senior notes due December 2016, 2.500%		398		-
Senior notes due April 2017, 3.500%		496		496
Senior notes due October 2017, 6.125%		498		498
Senior notes due September 2019, 5.625%		553		553
Senior notes due March 2021, 4.500%		492		492
Senior notes due December 2021, 3.875%		590		-
Senior debentures due April 2036, 6.875%		1,736		1,736
Senior debentures due October 2037, 6.750%		248		248
Senior debentures due February 2042, 4.500%		245		-
Senior notes due December 2055, 6.850%		-		750
Commercial paper		-		423
Capital lease and other obligations		259		406

Total debt		7,778		7,365
Less current portion		(21)		(23)

Total noncurrent portion	$	7,757	$	7,342

During the six months ended March 31, 2012, we issued a total of $1.750 billion of senior notes and debentures. In December 2011, we issued $400 million aggregate principal amount of 2.500% Senior Notes due 2016 at a price equal to 99.366% of the principal amount and $600 million aggregate principal amount of 3.875% Senior Notes due 2021 at a price equal to 98.361% of the principal amount. In February 2012, we issued $500 million aggregate principal amount of 1.250% Senior Notes due 2015 at a price equal to 99.789% of the principal amount and $250 million aggregate principal amount of 4.500% Senior Debentures due 2042 at a price equal to 98.063% of the principal amount.

On January 9, 2012, we redeemed all $750 million of our outstanding 6.850% Senior Notes due December 2055 (the “2055 Notes”) at a redemption price equal to 100% of the principal amount of each 2055 Note, plus accrued interest thereon. As a result of the redemption, we expensed the unamortized issuance costs associated with the 2055 Notes, which resulted in a pre-tax extinguishment loss of $21 million.

At March 31, 2012, the total unamortized net discount related to the senior notes and debentures was $49 million. The fair value of the Company's senior notes and debentures exceeded the carrying value by approximately $1.1 billion at March 31, 2012. The valuation of the Company's publicly traded debt is based on quoted prices in active markets.

In December 2011, we entered into an amendment to our $2.0 billion three-year revolving credit agreement, dated as of October 8, 2010, which modifies certain provisions of the original agreement to, among other things, (i) increase the amount of the credit facility from $2.0 billion to $2.1 billion, (ii) extend the maturity date of the credit facility from October 2013 to December 2015 and (iii) reduce the LIBOR-based borrowing rates under the credit facility to LIBOR plus a margin ranging from 0.5% to 1.5% based on our current public debt rating. The facility has one principal financial covenant that requires the Company's interest coverage for the most recent four consecutive fiscal quarters to be at least 3.0x, which the Company met at March 31, 2012.

In November 2011, we entered into two 364-day bank credit facilities for an aggregate amount of $600 million. The facilities will be used for general corporate purposes. The facilities contain covenants that are substantially the same as those contained in our $2.1 billion revolving credit facility. Borrowing rates under the facilities are determined at the time of each borrowing and are generally based on LIBOR plus a margin.

At March 31, 2012, there were no amounts outstanding under our credit facilities.