Notes Receivable (Tables)
 3 Months Ended
Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Notes Receivable Principal Payments (Net of Reserves and Unamortized Discounts) and Interest Rates
The following table presents the expected future principal payments (net of reserves and unamortized discounts) as well as interest rates for our notes receivable as of the end of the 2015 first quarter:
Notes Receivable Principal Payments (net of reserves and unamortized discounts) and Interest Rates ($ in millions)
 
Amount
2015
 
$
20

2016
 
73

2017
 
3

2018
 
4

2019
 
2

Thereafter
 
143

Balance at March 31, 2015
 
$
245

Weighted average interest rate at March 31, 2015
 
6.0
%
Range of stated interest rates at March 31, 2015
 
0 - 9.0%
Notes Receivable  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Composition of our Notes Receivable Balances (Net of Reserves and Unamortized Discounts)
The following table shows the composition of our notes receivable balances (net of reserves and unamortized discounts) at the end of the 2015 first quarter and year-end 2014:
 
At Period End
($ in millions)
March 31,
2015
 
December 31,
2014
Senior, mezzanine, and other loans
$
245

 
$
242

Less current portion
(91
)
 
(27
)
 
$
154

 
$
215