Loans Receivable (Summary Of Changes In Allowance For Credit Losses) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 176.4		$ 154.3		$ 126.9
Provision for credit losses	21.9		24.0		29.0
Write-offs	(5.3)		(4.2)		(3.5)
Recoveries	2.4	[1]	2.3	[1]	1.9	[1]
Balance, end of period	195.4		176.4		154.3
Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	167.4		141.7		113.2
Provision for credit losses	21.3		27.1		29.7
Write-offs	(5.2)		(3.6)		(3.0)
Recoveries	2.2	[1]	2.2	[1]	1.8	[1]
Balance, end of period	185.7		167.4		141.7
Purchased Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	9.0		12.6		13.7
Provision for credit losses	0.6		(3.1)		(0.7)
Write-offs	(0.1)		(0.6)		(0.5)
Recoveries	0.2	[1]	0.1	[1]	0.1	[1]
Balance, end of period	$ 9.7		$ 9.0		$ 12.6

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