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v3.20.4

Debt due within one year - Narrative (Details) - Dec. 31, 2020 | USD ($) | CAD ($)
--- | --- | ---
Commercial Paper |  |
Disclosure of detailed information about borrowings [line items] |  |
Maximum borrowing capacity | $ 3,000,000,000 | $ 3,000,000,000
Unsecured revolving credit facility and expansion facility |  |
Disclosure of detailed information about borrowings [line items] |  |
Maximum borrowing capacity |  | $ 3,500,000,000

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- Definition Line Of Credit Facility, Maximum Borrowing Capacity1 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |