Significant Transactions (WM Solutions) (Details) (WM Solutions, USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended	3 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013 Empire [Member]	Dec. 03, 2012 Runoff Entities [Member]	Mar. 31, 2013 American Fuji [Member]	Dec. 31, 2011 Old Lyme	Dec. 31, 2011 Old Lyme	Dec. 30, 2011 Old Lyme
Business Acquisition [Line Items]
Cash to be paid on acquisition					$ 6.0
Cash purchase price of note						2.1
Gain recognized	$ 7.3	$ 14.5	$ 6.9	$ 7.2