Note 8. Debt

Debt consisted of the following:


	December 31,		December 31,
	2016		2015
	(in millions)
Unsecured revolving credit facility due September 30, 2021	$	540.0	$	332.0
Unsecured term loan due from January 3, 2017 to September 30, 2021		600.0		398.8
Senior unsecured notes due November 15, 2016		—		350.0
Senior unsecured notes due April 15, 2023		500.0		500.0
Senior unsecured notes due November 15, 2036		250.0		250.0
Other notes and revolving credit facilities		55.0		111.3
Total		1,945.0		1,942.1
Less: unamortized discount and debt issuance costs		(15.8)		(13.4)
Less: amounts due within one year and short-term borrowings		(82.5)		(500.8)
Total long-term debt	$	1,846.7	$	1,427.9

Unsecured Credit Facility

On September 30, 2016, we entered into a $2.1 billion unsecured five-year credit agreement (“Credit Agreement”) comprised of a $1.5 billion unsecured revolving credit facility and a $600.0 million unsecured term loan, with an option to increase the revolving facility for up to $500.0 million at our request, subject to approval of the lenders and certain other customary conditions. The term loan due September 30, 2021 amortizes in quarterly installments, with an annual amortization of 5% through September 2018 and 10% thereafter until June 2021, with the balance to be paid at maturity. Interest on borrowings from the revolving credit facility and term loan at December 31, 2016 was at variable rates based on LIBOR plus 1.25% or the bank prime rate plus 0.25% and included a commitment fee at an annual rate of 0.15% on the unused portion of the revolving credit facility. The applicable margins over LIBOR rate and base rate borrowings, along with commitment fees, are subject to adjustment every quarter based on our leverage ratio, as defined in the Credit Agreement. All borrowings under the Credit Agreement may be repaid without penalty.

Weighted average interest rates on borrowings outstanding on the revolving credit facility were 2.16% and 1.81% as of December 31, 2016 and December 31, 2015, respectively. Weighted average interest rates on borrowings outstanding on the term loan were 2.02% and 1.67% as of December 31, 2016 and December 31, 2015, respectively. As of December 31, 2016, we had $540.0 million of outstanding borrowings, $62.6 million of letters of credit issued and $897.4 million available for borrowing on the revolving credit facility.

Senior Unsecured Notes

On November 20, 2006, we entered into an indenture (the “2006 Indenture”), for the issuance of $600.0 million of unsecured debt securities. The total debt issued was comprised of two tranches, (a) $350.0 million aggregate principal amount of senior unsecured notes bearing interest at the rate of 6.20% per annum, matured and repaid on November 15, 2016 and (b) $250.0 million aggregate principal amount of senior unsecured notes bearing interest at the rate of 6.85% per annum, maturing on November 15, 2036.

On April 12, 2013, we entered into an indenture (the “2013 Indenture” and, together with the 2006 Indenture, the “Indentures”), for the issuance of $500.0 million aggregate principal amount of senior unsecured notes at the rate of 4.50% per annum, maturing on April 15, 2023.

Under the Indentures, the notes are senior unsecured obligations and rank equally in right of payment with all of our existing and future unsecured and unsubordinated obligations. The subsidiary guarantors guaranteeing the notes under the Indentures were automatically released on September 30, 2016 upon entering into the Credit Agreement, which does not require subsidiary guarantees.

The senior unsecured notes include provisions that require us to make an offer to repurchase the notes at a price equal to 101% of their principal amount plus accrued and unpaid interest in the event of both a change in control and a downgrade of our credit rating.

Other Notes and Revolving Credit Facilities

Revolving credit facilities with a combined credit limit of approximately $64.9 million are in place for operations in Asia and Europe with combined outstanding balances of $44.4 million and $59.9 million as of December 31, 2016 and December 31, 2015, respectively.

Various industrial revenue bonds had combined outstanding balances of $10.6 million and $11.0 million as of December 31, 2016 and December 31, 2015, respectively, and maturities through 2027. Additionally, we assumed mortgage obligations pursuant to our acquisition of a portfolio of real estate properties that we were leasing, which had outstanding balances of $40.4 million as of December 31, 2015. The mortgages, which were secured by the underlying properties, had a fixed interest rate of 6.40% and scheduled amortization payments with a lump sum payment of $39.2 million due October 2016. We repaid all of the mortgage obligations without penalty on July 1, 2016 with borrowings on our revolving credit facility.

Covenants

The Credit Agreement includes customary representations, warranties and covenants, and acceleration, indemnity and events of default provisions, including, among other things, two financial covenants. The financial covenants require us to maintain an interest coverage ratio and a maximum leverage ratio.

Debt Maturities

The following is a summary of aggregate maturities of long‑term debt for each of the next five years and thereafter:


	(in millions)
2017	$	82.5
2018		38.0
2019		60.6
2020		60.6
2021		945.6
Thereafter		757.7
	$	1,945.0