XML 51 R86.htm IDEA: XBRL DOCUMENT

Investment Securities (Non-agency Mortgage-backed Securities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investment securities
Fair value investments	$ 5,991.4us-gaap_InvestmentsFairValueDisclosure	$ 6,766.5us-gaap_InvestmentsFairValueDisclosure	$ 6,950.7us-gaap_InvestmentsFairValueDisclosure
Residential
Investment securities
Fair value investments	131.2	125.7
Commercial
Investment securities
Fair value investments	236.9	282.3
Total Non-agency
Investment securities
Fair value investments	368.1	408.0
Securities Issued in 2004 [Member] \| Residential
Investment securities
Fair value investments	14.2
Securities Issued in 2004 [Member] \| Commercial
Investment securities
Fair value investments	0
Securities Issued in 2004 [Member] \| Total Non-agency
Investment securities
Fair value investments	14.2
2005 \| Residential
Investment securities
Fair value investments	14.7
2005 \| Commercial
Investment securities
Fair value investments	0
2005 \| Total Non-agency
Investment securities
Fair value investments	14.7
2006 \| Residential
Investment securities
Fair value investments	9.9
2006 \| Commercial
Investment securities
Fair value investments	8.5
2006 \| Total Non-agency
Investment securities
Fair value investments	18.4
2007 \| Residential
Investment securities
Fair value investments	0
2007 \| Commercial
Investment securities
Fair value investments	0
2007 \| Total Non-agency
Investment securities
Fair value investments	0
2008 \| Residential
Investment securities
Fair value investments	16.5
2008 \| Commercial
Investment securities
Fair value investments	0
2008 \| Total Non-agency
Investment securities
Fair value investments	16.5
2009 \| Residential
Investment securities
Fair value investments	0
2009 \| Commercial
Investment securities
Fair value investments	0
2009 \| Total Non-agency
Investment securities
Fair value investments	0
2010 \| Residential
Investment securities
Fair value investments	14.7
2010 \| Commercial
Investment securities
Fair value investments	11.7
2010 \| Total Non-agency
Investment securities
Fair value investments	26.4
2011 \| Residential
Investment securities
Fair value investments	21.4
2011 \| Commercial
Investment securities
Fair value investments	0
2011 \| Total Non-agency
Investment securities
Fair value investments	21.4
2012 \| Residential
Investment securities
Fair value investments	0
2012 \| Commercial
Investment securities
Fair value investments	20.7
2012 \| Total Non-agency
Investment securities
Fair value investments	20.7
2013 \| Residential
Investment securities
Fair value investments	29.7
2013 \| Commercial
Investment securities
Fair value investments	79.9
2013 \| Total Non-agency
Investment securities
Fair value investments	109.6
2014 \| Residential
Investment securities
Fair value investments	10.1
2014 \| Commercial
Investment securities
Fair value investments	116.1
2014 \| Total Non-agency
Investment securities
Fair value investments	$ 126.2