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Note 8. Short And Long-Term Debt Securitization Obligations (Details) £ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2018 GBP (£)
Debt Instrument [Line Items] |  |  |  |
Securitization obligations | $ 231 |  | $ 194 |
Securitization obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Securitization obligations | 231 |  | 194 |
Relocation receivables and other related relocation assets that collateralize securitization obligations | 238 |  | 218 |
Interest expense on securitization obligations | $ 9 |  | $ 7 |
Weighted average interest rate on securitization obligations | 3.80% |  | 3.30% | 3.80%
Apple Ridge Funding LLC | Securitization obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total capacity, securitization obligations | $ 250 |  |  |
Securitization obligations | 218 | [1],[2] | $ 181 |
Cartus Financing Limited | Securitization obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total capacity, securitization obligations | 19 |  |  |
Securitization obligations | $ 13 | [2],[3] | $ 13 |
Cartus Financing Limited | Revolving Credit Facility | Securitization obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total capacity, securitization obligations | £ |  |  |  | £ 10
Cartus Financing Limited | Working Capital Facility | Securitization obligations |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total capacity, securitization obligations | £ |  |  |  | £ 5
[1] | As of December 31, 2018, the Company had $250 million of borrowing capacity under the Apple Ridge Funding LLC securitization program leaving $32 million of available capacity.
[2] | Available capacity is subject to maintaining sufficient relocation related assets to collateralize these securitization obligations.
[3] | Consists of a £10 million revolving loan facility and a £5 million working capital facility. As of December 31, 2018, the Company had $19 million of borrowing capacity under the Cartus Financing Limited securitization program leaving $6 million of available capacity.

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