NOTES RECEIVABLE

The following table shows the composition of our notes receivable balances (net of reserves and unamortized discounts) at year-end 2013 and 2012:



($ in millions)	At Year-End 2013			At Year-End 2012
Senior, mezzanine, and other loans	$	178		$	242
Less current portion	(36		)	(62		)
	$	142		$	180

We classify notes receivable due within one year as current assets in the caption “Accounts and notes receivable” in our Balance Sheets.

The following table shows the expected future principal payments (net of reserves and unamortized discounts) as well as interest rates and unamortized discounts for our notes receivable as of year-end 2013:



Notes Receivable Principal Payments (net of reserves and unamortized discounts) and Interest Rates ($ in millions)	Amount
2014	$	36
2015	85
2016	4
2017	3
2018	5
Thereafter	45
Balance at year-end 2013	$	178
Weighted average interest rate at year-end 2013	4.6		%
Range of stated interest rates at year-end 2013	0 to 8.0%

The following table shows the unamortized discounts for our notes receivable as of year-end 2013 and 2012:



Notes Receivable Unamortized Discounts ($ in millions)	Amount
Balance at year-end 2012	$	11
Balance at year-end 2013	$	12

Senior, Mezzanine, and Other Loans

Generally, all of the loans we make have similar characteristics in that they are loans to owners and operators of hotels and hospitality properties. We reflect interest income for “Senior, mezzanine, and other loans” in the “Interest income” caption in our Income Statements. At year-end 2013, our recorded investment in impaired “Senior, mezzanine, and other loans” was $99 million. We had a $90 million notes receivable reserve representing an allowance for credit losses, leaving $9 million of our investment in impaired loans, for which we had no related allowance for credit losses. At year-end 2012, our recorded investment in impaired “Senior, mezzanine, and other loans” was $93 million, and we had a $79 million notes receivable reserve representing an allowance for credit losses, leaving $14 million of our investment in impaired loans, for which we had no related allowance for credit losses. Our average investment in impaired “Senior, mezzanine, and other loans” totaled $96 million during 2013, $94 million during 2012, and $89 million during 2011.

The following table summarizes the activity for our “Senior, mezzanine, and other loans” notes receivable reserve for 2011, 2012, and 2013:



($ in millions)	Notes Receivable Reserve
Balance at year-end 2010	$	74
Additions	2
Write-offs	(7		)
Transfers and other	9
Balance at year-end 2011	78
Additions	2
Reversals	(1		)
Write-offs	(1		)
Transfers and other	1
Balance at year-end 2012	79
Reversals	(2		)
Transfers and other	13
Balance at year-end 2013	$	90

Past due senior, mezzanine, and other loans totaled zero at year-end 2013 and $7 million at year-end 2012.