Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt [Abstract]

Schedule of Long-Term Debt

(in millions)		September 30, 2016		December 31, 2015
Senior debentures maturing April 15, 2026	$	375.0	$	-
Senior debentures maturing June 15, 2021		-		300.0
Senior debentures maturing March 1, 2020		-		80.0
Senior debentures maturing October 15, 2025		74.6		74.6
Subordinated debentures maturing March 30, 2053		175.0		175.0
Subordinated debentures maturing February 3, 2027		59.7		59.7
FHLBB borrowings (secured)		125.0		125.0
Total principal debt	$	809.3	$	814.3
Unamortized debt issuance costs		(11.4)		(11.2)
Total	$	797.9	$	803.1