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long-term debt - TELUS Corporation notes (Details) $ in Millions, $ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 CAD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 USD ($) $ / NotesSeries $ / NotesSeries | Dec. 31, 2018 CAD ($) $ / NotesSeries $ / NotesSeries | Feb. 28, 2018 CAD ($) $ / NotesSeries | Dec. 31, 2017 CAD ($) | Mar. 31, 2017 CAD ($) $ / NotesSeries | Dec. 31, 2015 CAD ($) $ / NotesSeries | Apr. 30, 2014 CAD ($) $ / NotesSeries
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 14,101 |  | $ 13,660 |  |  |
Long-term debt prepayment premium |  | $ 34 |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 12,186 |  | $ 11,561 |  |  |
Repurchase offer price, expressed as percentage of principal |  | 101.00% |  |  |  |  |  |  |
Redemption price percentage |  | 100.00% |  |  |  |  |  |  |
TELUS Corporation notes | Minimum |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Redemption period |  | 30 days |  |  |  |  |  |  |
TELUS Corporation notes | Maximum |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Redemption period |  | 60 days |  |  |  |  |  |  |
5.05% Notes, Series CG |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 5.05% | 5.05% |  |  |  |  |
Issued |  | December 2009 |  |  |  |  |  |  |
Maturity |  | December 2019 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 994.19 | 994.19 |  |  |  |  |
Effective interest rate |  |  | 5.13% | 5.13% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 1,000 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.455% | 0.455% |  |  |  |  |
Redemption present value spread - Cessation date |  | N/A |  |  |  |  |  |  |
Long-term debt prepayment premium | $ 34 |  |  |  |  |  |  |  |
5.05% Notes, Series CH |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 5.05% | 5.05% |  |  |  |  |
Issued |  | July 2010 |  |  |  |  |  |  |
Maturity |  | July 2020 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.44 | 997.44 |  |  |  |  |
Effective interest rate |  |  | 5.08% | 5.08% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 1,000 |  |  |  |  |
Long-term debt |  |  |  | $ 1,000 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.47% | 0.47% |  |  |  |  |
Redemption present value spread - Cessation date |  | N/A |  |  |  |  |  |  |
3.35% Notes, Series CJ |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.35% | 3.35% |  |  |  |  |
Issued |  | December 2012 |  |  |  |  |  |  |
Maturity |  | March 2023 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 998.83 | 998.83 |  |  |  |  |
Effective interest rate |  |  | 3.36% | 3.36% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 500 |  |  |  |  |
Long-term debt |  |  |  | $ 500 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.40% | 0.40% |  |  |  |  |
Redemption present value spread - Cessation date |  | Dec. 15, 2022 |  |  |  |  |  |  |
3.35% Notes, Series CK |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.35% | 3.35% |  |  |  |  |
Issued |  | April 2013 |  |  |  |  |  |  |
Maturity |  | April 2024 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 994.35 | 994.35 |  |  |  |  |
Effective interest rate |  |  | 3.41% | 3.41% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 1,100 |  |  |  |  |
Long-term debt |  |  |  | $ 1,100 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.36% | 0.36% |  |  |  |  |
Redemption present value spread - Cessation date |  | Jan. 2, 2024 |  |  |  |  |  |  |
4.40% Notes, Series CL |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.40% | 4.40% |  |  |  |  |
Issued |  | April 2013 |  |  |  |  |  |  |
Maturity |  | April 2043 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.68 | 997.68 |  |  |  |  |
Effective interest rate |  |  | 4.41% | 4.41% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 600 |  |  |  |  |
Long-term debt |  |  |  | $ 600 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.47% | 0.47% |  |  |  |  |
Redemption present value spread - Cessation date |  | Oct. 1, 2042 |  |  |  |  |  |  |
3.60% Notes, Series CM |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.60% | 3.60% |  |  |  |  |
Issued |  | November 2013 |  |  |  |  |  |  |
Maturity |  | January 2021 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.15 | 997.15 |  |  |  |  |
Effective interest rate |  |  | 3.65% | 3.65% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 400 |  |  |  |  |
Long-term debt |  |  |  | $ 400 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.35% | 0.35% |  |  |  |  |
Redemption present value spread - Cessation date |  | N/A |  |  |  |  |  |  |
5.15% Notes, Series CN |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 5.15% | 5.15% |  |  |  |  |
Issued |  | November 2013 |  |  |  |  |  |  |
Maturity |  | November 2043 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 995.00 | 995.00 |  |  |  |  |
Effective interest rate |  |  | 5.18% | 5.18% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 400 |  |  |  |  |
Long-term debt |  |  |  | $ 400 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.50% | 0.50% |  |  |  |  |
Redemption present value spread - Cessation date |  | May 26, 2043 |  |  |  |  |  |  |
3.20% Notes, Series CO |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.20% | 3.20% |  |  |  |  |
Issued |  | April 2014 |  |  |  |  |  |  |
Maturity |  | April 2021 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.39 | 997.39 |  |  |  |  |
Effective interest rate |  |  | 3.24% | 3.24% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 500 |  |  |  |  |
Long-term debt |  |  |  | $ 500 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.30% | 0.30% |  |  |  |  |
Redemption present value spread - Cessation date |  | Mar. 5, 2021 |  |  |  |  |  |  |
4.85% Notes, Series CP |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.85% | 4.85% |  |  |  |  | 4.85%
Maturity |  | April 2044 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 987.91 | 987.91 |  |  |  | 974.38 | 998.74
Effective interest rate |  |  | 4.93% | 4.93% |  |  |  | 5.02% | 4.86%
Principal face amount: Originally issued |  |  |  | $ 500 |  |  |  | $ 400 | $ 500
Long-term debt |  |  |  | $ 900 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.46% | 0.46% |  |  |  |  |
Redemption present value spread - Cessation date |  | Oct. 5, 2043 |  |  |  |  |  |  |
3.75% Notes, Series CQ |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.75% | 3.75% |  |  |  |  |
Issued |  | September 2014 |  |  |  |  |  |  |
Maturity |  | January 2025 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.75 | 997.75 |  |  |  |  |
Effective interest rate |  |  | 3.78% | 3.78% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 800 |  |  |  |  |
Long-term debt |  |  |  | $ 800 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.385% | 0.385% |  |  |  |  |
Redemption present value spread - Cessation date |  | Oct. 17, 2024 |  |  |  |  |  |  |
4.75% Notes, Series CR |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.75% | 4.75% |  |  |  |  |
Issued |  | September 2014 |  |  |  |  |  |  |
Maturity |  | January 2045 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 992.91 | 992.91 |  |  |  |  |
Effective interest rate |  |  | 4.80% | 4.80% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 400 |  |  |  |  |
Long-term debt |  |  |  | $ 400 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.515% | 0.515% |  |  |  |  |
Redemption present value spread - Cessation date |  | July 17, 2044 |  |  |  |  |  |  |
1.50% Notes, Series CS |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 1.50% | 1.50% |  |  |  |  |
Issued |  | March 2015 |  |  |  |  |  |  |
Maturity |  | March 2018 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 999.62 | 999.62 |  |  |  |  |
Effective interest rate |  |  | 1.51% | 1.51% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 250 |  |  |  |  |
Long-term debt |  |  |  | $ 0 |  |  |  |  |
Redemption present value spread - Cessation date |  | N/A |  |  |  |  |  |  |
2.35% Notes, Series CT |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 2.35% | 2.35% |  |  |  |  |
Issued |  | March 2015 |  |  |  |  |  |  |
Maturity |  | March 2022 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 997.31 | 997.31 |  |  |  |  |
Effective interest rate |  |  | 2.39% | 2.39% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 1,000 |  |  |  |  |
Long-term debt |  |  |  | $ 1,000 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.355% | 0.355% |  |  |  |  |
Redemption present value spread - Cessation date |  | Feb. 28, 2022 |  |  |  |  |  |  |
4.40% Notes, Series CU |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.40% | 4.40% |  |  |  |  |
Issued |  | March 2015 |  |  |  |  |  |  |
Maturity |  | January 2046 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 999.72 | 999.72 |  |  |  |  |
Effective interest rate |  |  | 4.40% | 4.40% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 500 |  |  |  |  |
Long-term debt |  |  |  | $ 500 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.605% | 0.605% |  |  |  |  |
Redemption present value spread - Cessation date |  | July 29, 2045 |  |  |  |  |  |  |
3.75% Notes, Series CV |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.75% | 3.75% |  |  |  |  |
Issued |  | December 2015 |  |  |  |  |  |  |
Maturity |  | March 2026 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 992.14 | 992.14 |  |  |  |  |
Effective interest rate |  |  | 3.84% | 3.84% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 600 |  |  |  |  |
Long-term debt |  |  |  | $ 600 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.535% | 0.535% |  |  |  |  |
Redemption present value spread - Cessation date |  | Dec. 10, 2025 |  |  |  |  |  |  |
2.80% U.S. Dollar Notes |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 2.80% | 2.80% |  |  |  |  |
Issued |  | September 2016 |  |  |  |  |  |  |
Maturity |  | February 2027 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 991.89 | 991.89 |  |  |  |  |
Effective interest rate |  |  | 2.89% | 2.89% |  |  |  |  |
Principal face amount: Originally issued |  |  | $ 600 |  |  |  |  |  |
Long-term debt |  |  | $ 600 |  |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.20% | 0.20% |  |  |  |  |
Redemption present value spread - Cessation date |  | Nov. 16, 2026 |  |  |  |  |  |  |
2.80% U.S. Dollar Notes | Foreign exchange derivative |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 2.95% | 2.95% |  |  |  |  |
Long-term debt |  |  |  | $ 792 |  |  |  |  |
Fixed exchange rate |  |  | 1.3205 | 1.3205 |  |  |  |  |
3.70% U.S. Dollar Notes |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.70% | 3.70% |  |  |  |  |
Issued |  | March 2017 |  |  |  |  |  |  |
Maturity |  | September 2027 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 998.95 | 998.95 |  |  |  |  |
Effective interest rate |  |  | 3.71% | 3.71% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 500 |  |  |  |  |
Long-term debt |  |  |  | $ 500 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.20% | 0.20% |  |  |  |  |
Redemption present value spread - Cessation date |  | June 15, 2027 |  |  |  |  |  |  |
3.70% U.S. Dollar Notes | Foreign exchange derivative |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.41% | 3.41% |  |  |  |  |
Long-term debt |  |  |  | $ 667 |  |  |  |  |
Fixed exchange rate |  |  | 1.3348 | 1.3348 |  |  |  |  |
4.70% Notes, Series CW |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.70% | 4.70% |  |  | 4.70% |  |
Issued |  | Multiple |  |  |  |  |  |  |
Maturity |  | March 2048 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 998.06 | 998.06 | 1,014.11 |  | 990.65 |  |
Effective interest rate |  |  | 4.71% | 4.71% | 4.61% |  | 4.76% |  |
Principal face amount: Originally issued |  |  |  | $ 325 | $ 150 |  | $ 325 |  |
Long-term debt |  |  |  | $ 475 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.585% | 0.585% |  |  |  |  |
Redemption present value spread - Cessation date |  | Sept. 6, 2047 |  |  |  |  |  |  |
3.625% Notes, Series CX |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.625% | 3.625% |  |  |  |  |
Issued |  | February 2018 |  |  |  |  |  |  |
Maturity |  | March 2028 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 989.49 | 989.49 |  |  |  |  |
Effective interest rate |  |  | 3.75% | 3.75% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 600 |  |  |  |  |
Long-term debt |  |  |  | $ 600 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.37% | 0.37% |  |  |  |  |
Redemption present value spread - Cessation date |  | Dec. 1, 2027 |  |  |  |  |  |  |
4.60% U.S. Dollar Notes |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.60% | 4.60% |  |  |  |  |
Issued |  | June 2018 |  |  |  |  |  |  |
Maturity |  | November 2048 |  |  |  |  |  |  |
Issue price per $1000 increment of debt | $ / NotesSeries |  |  | 987.60 | 987.60 |  |  |  |  |
Effective interest rate |  |  | 4.68% | 4.68% |  |  |  |  |
Principal face amount: Originally issued |  |  |  | $ 750 |  |  |  |  |
Long-term debt |  |  |  | $ 750 |  |  |  |  |
Redemption present value spread - Basis points |  |  | 0.25% | 0.25% |  |  |  |  |
Redemption present value spread - Cessation date |  | May 16, 2048 |  |  |  |  |  |  |
4.60% U.S. Dollar Notes | Foreign exchange derivative |  |  |  |  |  |  |  |  |
TELUS Corporation notes |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.41% | 4.41% |  |  |  |  |
Long-term debt |  |  |  | $ 974 |  |  |  |  |
Fixed exchange rate |  |  | 1.2985 | 1.2985 |  |  |  |  |

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_7&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | na
Period Type: | instant

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The effective interest rate on borrowings. + References No definition available. + Details
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Namespace Prefix: | tu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The issue price of the borrowings per $1000 increment of debt. + References No definition available. + Details
Name: | tu_BorrowingsIssuePrice
Namespace Prefix: | tu_
Data Type: | us-types:perUnitItemType
Balance Type: | na
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X
- Definition Redemption period for the borrowings. + References No definition available. + Details
Name: | tu_BorrowingsRedemptionPeriod
Namespace Prefix: | tu_
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Balance Type: | na
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- Definition Percentage price of original principal amount of borrowings at which borrowings can be redeemed by the issuer. + References No definition available. + Details
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Namespace Prefix: | tu_
Data Type: | num:percentItemType
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Period Type: | duration

X
- Definition The redemption spread basis points. + References No definition available. + Details
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X
- Definition Percentage price of original principal amount of borrowings plus accrued and unpaid interest at which borrowings can be repurchased by the issuer upon the occurrence of a change in control triggering event, as required by provisions set out in the Notes. + References No definition available. + Details
Name: | tu_BorrowingsRepurchasePricePercentage
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Period Type: | duration

X
- Definition The date, prior to which the notes are redeemable on not fewer than 30 and not more than 60 days' prior notice, at a price equal to the greater of the discounted present value of the notes plus the redemption present value spread calculated over the period to the redemption present value spread cessation date, or (ii) 100% of the principal amount thereof. On or after the redemption present value spread cessation date, the notes are redeemable at the issuer's option, in whole but not in part, at a redemption price equal to 100% of the principal amount thereof. + References No definition available. + Details
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- Definition Fixed exchange rate of the derivative to convert them into reporting currency. + References No definition available. + Details
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- Definition The date the debt instrument was issued. + References No definition available. + Details
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- Definition Total long-term borrowings, including the current and non-current portion. + References No definition available. + Details
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