Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 4

-Article 4

Investments in Unconsolidated Affiliates (Symetra) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended					3 Months Ended		9 Months Ended			6 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		6 Months Ended			12 Months Ended			12 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Symetra	Sep. 30, 2012 Symetra	Sep. 30, 2013 Symetra	Sep. 30, 2012 Symetra	Jun. 20, 2013 Symetra	Dec. 31, 2012 Symetra	Jun. 20, 2013 Common Stock	Sep. 30, 2013 Common Stock Symetra	Sep. 30, 2012 Common Stock Symetra	Sep. 30, 2013 Common Stock Symetra	Sep. 30, 2012 Common Stock Symetra	Dec. 31, 2011 Common Stock Symetra	Jun. 20, 2013 Warrants	Sep. 30, 2013 Warrants Symetra	Sep. 30, 2012 Warrants Symetra	Jun. 20, 2013 Warrants Symetra	Sep. 30, 2013 Warrants Symetra	Sep. 30, 2012 Warrants Symetra	Jun. 20, 2013 Symetra Common Stock	Sep. 30, 2013 equity in earnings of unconsolidated affiliates [Member] Symetra	Jun. 20, 2013 equity in earnings of unconsolidated affiliates [Member] Symetra	Dec. 31, 2011 equity in earnings of unconsolidated affiliates [Member] Common Stock Symetra	Sep. 30, 2013 Net unrealized gains (losses) of unconsolidated affiliates [Member] Symetra	Jun. 20, 2013 Net unrealized gains (losses) of unconsolidated affiliates [Member] Symetra	Dec. 31, 2011 Net unrealized gains (losses) of unconsolidated affiliates [Member] Common Stock Symetra
Investments in unconsolidated affiliates
Shares of Symetra Financial Corporation owned (in shares)				20,050,000		20,050,000			17,400,000
Ownership interest (as a percent)				17.00%		17.00%			15.00%
Investments in unconsolidated affiliates on conversion of warrants								9,490,000	9,490,000
Common shares received from exercised warrants										$ 2.65
Stock Repurchased and Retired During Period, Shares																						6,600,000
Average price per share	$ 528.00	$ 564.00	$ 499.00																			$ 13.44
Unamortized basis difference								19.3																0.4			18.9
Fair value of investment															261.0
Estimated fair value of investment per share															$ 15
Other than Temporary Impairment Losses, Investments																									45.9			136.6
Equity in net unrealized losses increase relating to amortization of common share impairment											3.1	3.3	8.6	9.9
Term of amortization (in years)						30 years
After tax amortization through equity in earnings				0.7		2.1
After tax amortization through equity in net unrealized losses				2.9		7.9
Pre-tax unamortized basis difference				187.6		187.6																	39.8			147.8
Gain (Loss) on Warrants				0	(3.6)	10.8	13.6				0	0	0	0		14.5	0	(3.6)		10.8	13.6
Risk free interest rate (as a percent)																			0.34%
Volatility rate (as a percent)																			26.50%
Expected life (in years)																			1 year 1 month 10 days
Class of warrant or right fair value assumptions per strike price																			11.49
Share Price				$ 17.82		$ 17.82													$ 15.53
Proceeds from Equity Method Investment, Dividends or Distributions				(1.8)	(1.3)	(4.6)	(3.7)				(1.8)	(1.3)	(4.6)	(3.7)			0	0		0	0
Proceeds from Dividends Received																			$ 1.5