Intangibles and Other Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Intangibles and Other Assets
Investments in affiliates	$ 33.6		$ 33.6		$ 32.2
Intangible assets (net of accumulated amortization)	171.5		171.5		162.9
Accumulated amortization	87.0		87.0		68.1
Capitalized software (net of accumulated amortization)	61.6		61.6		50.4
Accumulated amortization	87.7		87.7		78.4
Company and trust-owned life insurance	139.9		139.9		114.7
Deferred financing costs	47.8		47.8		37.3
Other	89.5		89.5		122.2
Intangibles and Other Assets	543.9		543.9		519.7
Amortization expense of intangible assets	$ 9.8	$ 10.3	$ 28.7	$ 20.0