Debt and Borrowing Arrangements (Details 3) (USD $) In Millions	Jun. 30, 2011
Term notes, in revolving period [Member] | Vehicle Management Asset-Backed Debt [Member]
Available capacity under committed asset-backed debt arrangements and unsecured credit facilities
Capacity	$ 92
Utilized Capacity	92
Available Capacity	0
Variable-funding notes [Member] | Vehicle Management Asset-Backed Debt [Member]
Available capacity under committed asset-backed debt arrangements and unsecured credit facilities
Capacity	1,511
Utilized Capacity	1,260
Available Capacity	251
Committed warehouse facilities [Member] | Mortgage Asset-Backed Debt [Member]
Available capacity under committed asset-backed debt arrangements and unsecured credit facilities
Capacity	2,535
Utilized Capacity	1,352
Available Capacity	1,183
Servicing advance facility [Member] | Mortgage Asset-Backed Debt [Member]
Available capacity under committed asset-backed debt arrangements and unsecured credit facilities
Capacity	120
Utilized Capacity	76
Available Capacity	44
Credit facilities [Member] | Unsecured Debt [Member]
Available capacity under committed asset-backed debt arrangements and unsecured credit facilities
Capacity	530
Utilized Capacity	16
Available Capacity	$ 514