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Long-term and Short-term Debt
12 Months Ended
Sep. 30, 2019
Debt Disclosure [Abstract]  
Long-term and Short-term Debt Long-term and Short-term Debt
Long-term debt consists of (in millions):
 
 
September 30,
 
 
2019
 
2018
2.050% notes, payable in March 2020
 
$
299.4

 
$
294.6

2.875% notes, payable in March 2025
 
307.6

 
281.4

6.70% debentures, payable in January 2028
 
250.0

 
250.0

3.500% notes, payable in March 2029
 
425.0

 

6.25% debentures, payable in December 2037
 
250.0

 
250.0

4.200% notes, payable in March 2049
 
575.0

 

5.20% debentures, payable in January 2098
 
200.0

 
200.0

Unamortized discount, capitalized lease obligations and other
 
(50.1
)
 
(50.8
)
Total
 
2,256.9

 
1,225.2

Less current portion
 
(300.5
)
 

Long-term debt
 
$
1,956.4

 
$
1,225.2


In March 2019, we issued $1 billion aggregate principal amount of long-term notes in a registered public offering. The offering consisted of $425.0 million of 3.500% notes due in March 2029 (“2029 Notes”) and $575.0 million of 4.200% notes due in March 2049 (“2049 Notes”), both issued at a discount. Net proceeds to the Company from the debt offering were $987.6 million. We used these net proceeds primarily to repay our outstanding commercial paper, with the remaining proceeds used for general corporate purposes.
We entered into treasury locks to manage the potential change in interest rates in anticipation of the issuance of $1.0 billion of fixed rate debt in March 2019. Treasury locks are accounted for as cash flow hedges. The effective differentials paid on these treasury locks was initially recorded in Accumulated Other Comprehensive Loss, net of tax effect.
As a result of the changes in the interest rates on the treasury locks between the time we entered into the treasury locks and the time we priced and issued the 2029 Notes and 2049 Notes, the Company made a payment of $35.7 million to the counterparty on March 1, 2019. The $35.7 million loss on the settlement of the treasury locks was recorded in Accumulated Other Comprehensive Loss and is being amortized over the term of the 2029 Notes and 2049 Notes, and recognized as an adjustment to interest expense in the Consolidated Statement of Operations.
In February 2015, upon issuance of our notes payable in March 2020 (“2020 Notes”) and March 2025 (“2025 Notes”), we entered into fixed-to-floating interest rate swap contracts with multiple banks that effectively converted the $600.0 million aggregate principal amount of 2020 Notes and 2025 Notes to floating rate debt, each at a rate based on three-month LIBOR plus a fixed spread. The effective floating interest rates were 2.576 percent for the 2020 Notes and 2.986 percent for the 2025 Notes at September 30, 2019. The aggregate fair value of the interest rate swap contracts at September 30, 2019 was a net unrealized gain of $7.0 million. We have designated these swaps as fair value hedges. The individual contracts are recorded in Other assets and
Other current liabilities in the Consolidated Balance Sheet with corresponding adjustments to the carrying value of the underlying debt. Additional information related to our interest rate swap contracts is included in Note 10.
On November 13, 2018, we replaced our former five-year $1.0 billion unsecured revolving credit facility with a new five-year $1.25 billion unsecured revolving credit facility expiring in November 2023. We can increase the aggregate amount of this credit facility by up to $750.0 million, subject to the consent of the banks in the credit facility. We did not incur early termination penalties in connection with the termination of the former credit facility. We did not borrow against either facility during the periods ended September 30, 2019 or 2018. Borrowings under the new credit facility bear interest based on short-term money market rates in effect during the period the borrowings are outstanding. This credit facility contains covenants under which we agree to maintain an EBITDA-to-interest ratio of at least 3.0 to 1.0. The EBITDA-to-interest ratio is defined in the credit facility as the ratio of consolidated EBITDA (as defined in the facility) for the preceding four quarters to consolidated interest expense for the same period.
Interest payments were $97.5 million during 2019, $75.5 million during 2018 and $74.2 million during 2017.
Long-term debt is not measured at fair value. The following table presents the carrying amounts and estimated fair values of long-term debt not measured at fair value in the Consolidated Balance Sheet (in millions):
 
 
September 30, 2019
 
September 30, 2018
 
 
Carrying Value
 
Fair Value
 
Carrying Value
 
Fair Value
Current portion of long-term debt
 
$
300.5

 
$
300.1

 
$

 
$

Long-term debt
 
1,956.4

 
2,380.8

 
1,225.2

 
1,391.3


We base the fair value of long-term debt upon quoted market prices for the same or similar issues and therefore consider this a Level 2 fair value measurement. The fair value of long-term debt considers the terms of the debt excluding the impact of derivative and hedging activity. The carrying amount of a portion of our long-term debt is impacted by fixed-to-floating interest rate swap contracts that are designated as fair value hedges. Refer to Note 1 for further information regarding levels in the fair value hierarchy.
Our short-term debt obligations are primarily comprised of commercial paper borrowings. There were no commercial paper borrowings outstanding as of September 30, 2019. Commercial paper borrowings were $550.0 million at September 30, 2018. The weighted average interest rate of the commercial paper outstanding was 2.27 percent at September 30, 2018.