Other Assets
6 Months Ended
Mar. 31, 2016
Other Assets [Abstract]  
Other Assets
Other Assets

Other assets are summarized as follows:
(in millions)
March 31,
2016
 
September 30,
2015
Long-term receivables
$
110

 
$
109

Investments in equity affiliates
11

 
13

Exchange and rental assets (net of accumulated depreciation of $99 at March 31, 2016 and $97 at September 30, 2015)
65

 
66

Other
158

 
156

Other assets
$
344

 
$
344



Long-Term Receivables
Long-term receivables expected to be collected beyond the next twelve months are principally comprised of unbilled accounts receivables pursuant to sales recorded under the percentage-of-completion method of accounting that have not yet been billed to customers in accordance with applicable contract terms.

Investments in Equity Affiliates
The Company's investments in equity affiliates primarily consist of eight joint ventures, each 50 percent owned and accounted for under the equity method. During the three months ended March 31, 2015, the Company established ACCEL (Tianjin) Flight Simulation Co., Ltd (ACCEL), a 50 percent owned joint venture with Beijing Bluesky Aviation Technology. Consistent with the terms of the joint venture agreement, the Company contributed $5 million cash to ACCEL in 2015 and expects to contribute an additional $2 million cash in 2016.

The Company records income or loss from equity affiliates in Other income, net on the Condensed Consolidated Statement of Operations. The Company's sales to equity affiliates were $55 million and $101 million for the three and six months ended March 31, 2016, respectively, compared to $49 million and $88 million for the three and six months ended March 31, 2015. Deferred profit from sales to equity affiliates was $1 million at March 31, 2016 and $1 million at September 30, 2015.

Exchange and Rental Assets
Exchange and rental assets consist primarily of Company products that are either exchanged or rented to customers on a short-term basis in connection with warranty and other service-related activities. These assets are recorded at acquisition or production cost and depreciated using the straight-line method over their estimated lives, up to 15 years. Depreciation methods and lives are reviewed periodically with any changes recorded on a prospective basis. Depreciation expense for exchange and rental assets was $3 million and $5 million for the three and six months ended March 31, 2016, respectively, and $3 million and $5 million for the three and six months ended March 31, 2015.