Disclosures about Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Summary of Company's Financial Instruments Whose Carrying Amount Did Not Equal Fair Value

A summary of our financial instruments whose carrying value did not equal fair value is shown below:

	June 30, 2018				December 31, 2017
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Junior subordinated debentures
Trust preferred debentures	$	172.7	$	172.9	$	172.7	$	172.9
Subordinated debentures acquired with Maybrooke	84.1		83.3		83.9		85.0
Senior unsecured fixed rate notes	139.7		141.1		139.6		141.2
Floating rate loan stock	59.0		59.0		58.9		59.0