XML 110 R84.htm IDEA: XBRL DOCUMENT v3.23.3
Debt and Capital Structure - Schedule Remaining Principal Amounts of Unsecured Notes (Details) - Long-Term Debt
$ in Millions, $ in Millions
Sep. 30, 2023
USD ($)
Sep. 30, 2023
CAD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CAD ($)
Disclosure of detailed information about borrowings [line items]        
Total debt principal   $ 7,140   $ 8,537
Canadian Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Total debt principal   2,000   2,000
Unsecured Notes | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Total debt principal $ 3,802 $ 5,140 $ 4,827 6,537
5.38% due July 15, 2025 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 5.38% 5.38%    
Total debt principal $ 133 $ 181 133 181
4.25% due April 15, 2027 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 4.25% 4.25%    
Total debt principal $ 373 $ 505 373 505
4.40% due April 15, 2029 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 4.40% 4.40%    
Total debt principal $ 183 $ 247 240 324
2.65% due January 15, 2032 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 2.65% 2.65%    
Total debt principal $ 500 $ 676 500 677
5.25% due June 15, 2037 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 5.25% 5.25%    
Total debt principal $ 333 $ 450 583 790
6.80% due September 15, 2037 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 6.80% 6.80%    
Total debt principal $ 191 $ 259 387 524
6.75% due November 15, 2039 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 6.75% 6.75%    
Total debt principal $ 652 $ 881 935 1,267
4.45% due September 15, 2042 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 4.45% 4.45%    
Total debt principal $ 91 $ 123 97 131
5.20% due September 15, 2043 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 5.20% 5.20%    
Total debt principal $ 27 $ 36 29 39
5.40% due June 15, 2047 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 5.40% 5.40%    
Total debt principal $ 569 $ 768 800 1,083
3.75% due February 15, 2052 | U.S. Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 3.75% 3.75%    
Total debt principal $ 750 $ 1,014 $ 750 1,016
3.60% due March 10, 2027 | Canadian Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 3.60% 3.60%    
Total debt principal   $ 750   750
3.50% due February 7, 2028 | Canadian Dollar Denominated Unsecured Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt, interest rate 3.50% 3.50%    
Total debt principal   $ 1,250   $ 1,250