Progressive Corporation (a property and casualty insurance company) reported the following in its 2013 annual report:

	2013			2012
(in millions)	Carrying Value	Fair Value	Carrying Value		Fair Value
7% Notes due 2013 (issued: $150.0, October 1993)	$ 0.0	$ 0.0	$ 149.9		$ 157.1
3.75% Senior Notes due 2021 (issued: $500.0, August 2011)	497.6	509.1	497.3		549.1
6 58% Senior Notes due 2029 (issued: $300.0, March 1999)	295.3	359.6	295.2		385.0
6.25% Senior Notes due 2032 (issued: $400.0, November 2002)	394.6	473.7	394.5		513.5
6.70% Fixed-to-Floating Rate Junior Subordinated Debentures due 2067 (issued: $1,000.0, June 2007; outstanding $677.1 and $731.2)	673.4	731.3	726.2		789.7
	$1,860.9	$2,073.7	$2,063.1		$2,394.4

In March 2013, we entered into an unsecured, discretionary line of credit (the Line of Credit) with PNC Bank, National Association (PNC) in the maximum principal amount of $100 million. Subject to the terms and conditions of the Line of Credit documents, advances under the Line of Credit (if any) will bear interest at a variable rate equal to the higher of PNCs Prime Rate and the sum of the Federal Funds Open Rate plus 50 basis points. Each advance must be repaid on the 30^th date after the advance or, if earlier, on March 25, 2014, the expiration date of the Line of Credit. Prepayments are permitted without penalty. All advances under the Line of Credit are subject to PNCs discretion. We had no borrowings under the Line of Credit in 2013.

Aggregate principal payments on debt outstanding at December 31, 2013, is as follows:

(millions)
Year		Payments
2014	$	0.0
2015		0.0
2016		0.0
2017		0.0
2018		0.0
Thereafter		1,877.1
Total	$	1,877.1

Required:

What amount does Progressive report for long-term debt on its balance sheet?

Why is there a difference between the fair value and the carrying value of Progressives long-term debt?

Were the 3.75% notes originally issued at par, at a discount or at a premium? How do you know?

What is the amount of the unamortized discount on the 6.25% notes as of December 31, 2013?