DEBT

Debt is summarized below:



(In millions)	April 1, 2016			January 1, 2016
Long-term debt:
5.50% Senior notes due 2023	$	345.9		$	345.8
5.125% Senior notes due 2021	395.1			394.9
5.625% Senior notes due 2019	347.0			346.8
Canadian term loan	184.3			172.9
Revolving lines of credit	298.6			390.1
Other	2.2			2.6
Unamortized debt issuance costs	(9.5		)	(10.2		)
Total long-term debt	$	1,563.6		$	1,642.9

Retirement of Debt

In the first quarter of 2015, we retired our 5.95% Senior notes due 2015 upon maturity for $200.0 million. Available borrowings under existing long-term financing agreements were used to settle the maturity value.

Fair Value of Debt

The fair value of our debt instruments is measured using observable market information which would be considered Level 2 in the fair value hierarchy described in accounting guidance on fair value measurements. Our fixed-rate debt consists of the Senior notes due 2023, Senior notes due 2021 and Senior notes due 2019.

At April 1, 2016, our total carrying value and estimated fair value of debt outstanding was $1,563.6 million and $1,599.7 million, respectively. This compares to a carrying value and estimated fair value of debt outstanding at January 1, 2016 of $1,642.9 million and $1,669.5 million, respectively. The decrease in the carrying value and estimated fair value is primarily due to lower outstanding borrowings under our revolving lines of credit.