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long-term debt - TELUS International (Cda) Inc. credit facility (Details) $ in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) item | Dec. 31, 2018 CAD ($) item | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CAD ($)
long-term debt |  |  |  |
Maximum aggregate amount of credit facility |  | $ 2,250 |  | $ 2,250
Long-term debt |  | 14,101 |  | 13,660
Undrawn borrowing facilities |  | 1,476 |  | 1,110
TELUS International (Cda) Inc. credit facility |  |  |  |
long-term debt |  |  |  |
Maximum aggregate amount of credit facility | $ 463 |  | $ 469 |
Outstanding | 313 |  | 276 |
Long-term debt |  | $ 419 |  | $ 339
Undrawn borrowing facilities | $ 150 |  | 193 |
Number of financial ratio tests | item | 2 | 2 |  |
Percentage of principal advance to repay | 5.00% |  |  |
TELUS International (Cda) Inc. credit facility | Minimum |  |  |  |
long-term debt |  |  |  |
Operating cash flow to debt service ratio | 1.50 | 1.50 |  |
TELUS International (Cda) Inc. credit facility | Maximum |  |  |  |
long-term debt |  |  |  |
Net debt to operating cash flow ratio | 3.25 | 3.25 |  |
Revolving component |  |  |  |
long-term debt |  |  |  |
Maximum aggregate amount of credit facility | $ 350 |  | 350 |
Outstanding | 200 | $ 427 | 157 |
Long-term debt |  | $ (419) |  |
Undrawn borrowing facilities | $ 150 |  | 193 |
Weighted average interest rate | 4.22% | 4.22% |  |
Term loan component |  |  |  |
long-term debt |  |  |  |
Maximum aggregate amount of credit facility | $ 120 |  | 120 |
Outstanding | $ 113 |  | $ 119 |
Term loan component | Fixed interest rate |  |  |  |
long-term debt |  |  |  |
Fixed interest rate | 2.64% | 2.64% |  |

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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 50 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_50_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Borrowings that are outstanding at the reporting date, excluding unamortized costs. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References No definition available. + Details
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