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Note 8. Short And Long-Term Debt Securitization Obligations (Details) £ in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2017 GBP (£) | Dec. 31, 2017 USD ($) | Nov. 01, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Securitization obligations |  | $ 205 |  | $ 194 |  |
Securitization obligations |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Securitization obligations |  | 205 |  | 194 |  |
Relocation receivables and other related relocation assets that collateralize securitization obligations |  | 238 |  | $ 218 |  |
Interest expense on securitization obligations | $ 7 | $ 6 |  |  |  |
Weighted average interest rate on securitization obligations |  | 2.60% | 3.30% | 3.30% |  |
Apple Ridge Funding LLC | Securitization obligations |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total capacity, securitization obligations |  |  |  | $ 250 |  | $ 325
Securitization obligations |  | $ 192 |  | 181 | [1],[2] |
Cartus Financing Limited | Securitization obligations |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total capacity, securitization obligations |  |  |  | 20 |  |
Securitization obligations |  | $ 13 |  | $ 13 | [1],[3] |
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] | Available capacity is subject to maintaining sufficient relocation related assets to collateralize these securitization obligations.
[2] | In November 2017, the capacity of the Apple Ridge facility was reduced from $325 million to $250 million. As of December 31, 2017, the Company had $250 million of borrowing capacity under the Apple Ridge Funding LLC securitization program leaving $69 million of available capacity.
[3] | Consists of a £10 million revolving loan facility and a £5 million working capital facility. As of December 31, 2017, the Company had $20 million of borrowing capacity under the Cartus Financing Limited securitization program leaving $7 million of available capacity.

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