Accounts Receivable and Finance Receivables (Details 7) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011 Customer
Aviation [Member]
Summary of troubled debt restructurings resulting in transfers of assets
Number of Customers	27
Pre-Modification Recorded Investment	$ 53
Post-Modification Asset Balance	32
Golf Mortgage [Member]
Summary of troubled debt restructurings resulting in transfers of assets
Number of Customers	5
Pre-Modification Recorded Investment	59
Post-Modification Asset Balance	39
Timeshare [Member]
Summary of troubled debt restructurings resulting in transfers of assets
Number of Customers	2
Pre-Modification Recorded Investment	96
Post-Modification Asset Balance	$ 60