Loans Receivable (Summary Of Changes In Allowance For Credit Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 195.4		$ 176.4
Provision for credit losses	4.7		5.8
Write-offs	(0.5)		(1.1)
Recoveries	0.5	[1]	0.6	[1]
Balance, end of period	200.1		181.7
Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	185.7		167.4
Provision for credit losses	5.1		6.0
Write-offs	(0.5)		(1.1)
Recoveries	0.5	[1]	0.6	[1]
Balance, end of period	190.8		172.9
Purchased Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	9.7		9.0
Provision for credit losses	(0.4)		(0.2)
Balance, end of period	$ 9.3		$ 8.8

[1] Represents collections received on previously written off Loans.