XML 125 R108.htm IDEA: XBRL DOCUMENT v3.20.4
LONG-TERM DEBT - Summary of Long-term Debt (Details)
Dec. 31, 2020
CAD ($)
Dec. 31, 2020
USD ($)
Jun. 22, 2020
USD ($)
Mar. 31, 2020
CAD ($)
Dec. 31, 2019
CAD ($)
Dec. 31, 2019
USD ($)
Nov. 12, 2019
USD ($)
Apr. 30, 2019
USD ($)
Disclosure of detailed information about borrowings [line items]                
Long-term debt $ 16,751,000,000       $ 15,967,000,000      
Deferred transaction costs and discounts (172,000,000)       (163,000,000)      
Less current portion (1,450,000,000)       0      
Senior Notes Due 2021 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 1,450,000,000              
Interest rate 5.34% 5.34%            
Senior Notes Due 2022 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 600,000,000              
Interest rate 4.00% 4.00%            
Senior Notes Due 2022 | Floating interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 750,000,000 $ 750,000,000          
Senior Notes Due 2023 - 3.000% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 500,000,000            
Interest rate 3.00% 3.00%            
Senior Notes Due 2023 - 4.100% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 850,000,000            
Interest rate 4.10% 4.10%            
Senior Notes Due 2024 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 600,000,000              
Interest rate 4.00% 4.00%            
Senior Notes Due 2025 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 700,000,000            
Interest rate 3.625% 3.625%            
Senior Notes Due 2026 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 500,000,000            
Interest rate 2.90% 2.90%            
Senior Notes Due 2027 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 1,500,000,000     $ 1,500,000,000        
Interest rate 3.65% 3.65%   3.65%        
Senior Notes Due 2029 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 1,000,000,000              
Interest rate 3.25% 3.25%            
Senior Debentures Due 2032 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 200,000,000            
Interest rate 8.75% 8.75%            
Senior Notes Due 2038 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 350,000,000            
Interest rate 7.50% 7.50%            
Senior Notes Due 2039 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 500,000,000              
Interest rate 6.68% 6.68%            
Senior Notes Due 2040 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 800,000,000              
Interest rate 6.11% 6.11%            
Senior Notes Due 2041 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount $ 400,000,000              
Interest rate 6.56% 6.56%            
Senior Notes Due 2043 - 4.500% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 500,000,000            
Interest rate 4.50% 4.50%            
Senior Notes Due 2043 - 5.450% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 650,000,000            
Interest rate 5.45% 5.45%            
Senior Notes Due 2044 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 1,050,000,000            
Interest rate 5.00% 5.00%            
Senior Notes Due 2048 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 750,000,000            
Interest rate 4.30% 4.30%            
Senior Notes Due 2049 - 4.350% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 1,250,000,000       $ 1,250,000,000   $ 1,250,000,000
Interest rate 4.35% 4.35%           4.35%
Senior Notes Due 2049 - 3.700% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Principal amount   $ 1,000,000,000       $ 1,000,000,000 $ 1,000,000,000  
Interest rate 3.70% 3.70%         3.70%  
Gross carrying amount                
Disclosure of detailed information about borrowings [line items]                
Long-term debt $ 18,373,000,000       16,130,000,000      
Gross carrying amount | Senior Notes Due 2021 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,450,000,000       1,450,000,000      
Gross carrying amount | Senior Notes Due 2022 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 600,000,000       600,000,000      
Gross carrying amount | Senior Notes Due 2022 | Floating interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 955,000,000       0      
Gross carrying amount | Senior Notes Due 2023 - 3.000% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 637,000,000       649,000,000      
Gross carrying amount | Senior Notes Due 2023 - 4.100% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,082,000,000       1,104,000,000      
Gross carrying amount | Senior Notes Due 2024 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 600,000,000       600,000,000      
Gross carrying amount | Senior Notes Due 2025 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 890,000,000       909,000,000      
Gross carrying amount | Senior Notes Due 2026 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 637,000,000       649,000,000      
Gross carrying amount | Senior Notes Due 2027 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,500,000,000       0      
Gross carrying amount | Senior Notes Due 2029 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,000,000,000       1,000,000,000      
Gross carrying amount | Senior Debentures Due 2032 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 255,000,000       260,000,000      
Gross carrying amount | Senior Notes Due 2038 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 446,000,000       455,000,000      
Gross carrying amount | Senior Notes Due 2039 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 500,000,000       500,000,000      
Gross carrying amount | Senior Notes Due 2040 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 800,000,000       800,000,000      
Gross carrying amount | Senior Notes Due 2041 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 400,000,000       400,000,000      
Gross carrying amount | Senior Notes Due 2043 - 4.500% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 637,000,000       649,000,000      
Gross carrying amount | Senior Notes Due 2043 - 5.450% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 827,000,000       844,000,000      
Gross carrying amount | Senior Notes Due 2044 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,337,000,000       1,365,000,000      
Gross carrying amount | Senior Notes Due 2048 | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 955,000,000       973,000,000      
Gross carrying amount | Senior Notes Due 2049 - 4.350% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt 1,592,000,000       1,624,000,000      
Gross carrying amount | Senior Notes Due 2049 - 3.700% | Fixed interest rate                
Disclosure of detailed information about borrowings [line items]                
Long-term debt $ 1,273,000,000       $ 1,299,000,000