Disclosures about Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 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:

	September 30, 2018				December 31, 2017
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Junior subordinated debentures:
Trust preferred debentures	$	172.7	$	170.9	$	172.7	$	172.9
Subordinated debentures acquired with Maybrooke	84.2		87.2		83.9		85.0
Total junior subordinated debentures	256.9		258.1		256.6		257.9
Senior unsecured fixed rate notes	139.8		140.6		139.6		141.2
Floating rate loan stock	58.3		57.6		58.9		59.0