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Cash Flow Information (Notes)
12 Months Ended
Dec. 31, 2019
Disclosure of cash flow statement [Abstract]  
Cash Flow Information Cash Flow Information
A. Change in Non-Cash Operating Working Capital
Year ended Dec. 31201920182017
(Use) source:   
Accounts receivable261  58  (228) 
Prepaid expenses—  19  (75) 
Income taxes receivable(6) —   
Inventory(13) (21) (7) 
Accounts payable, accrued liabilities and provisions(130) (97) 186  
Income taxes payable (3)  
Change in non-cash operating working capital121  (44) (114) 

B. Changes in Liabilities from Financing Activities
Balance Dec. 31, 2018Net cash flowsNew leasesTax shield on tax equity financingDividends declaredForeign exchange impactOtherBalance Dec. 31, 2019
Long-term debt and lease
obligations
3,267  (70) 133  (35) —  (42) (41) 3,212  
Exchangeable securities—  350  —  —  —  —  (24) 326  
Dividends payable (common and
preferred)
58  (85) —  —  64  —  —  37  
Total liabilities from financing activities3,325  195  133  (35) 64  (42) (65) 3,575  

Balance
Dec. 31, 2017
Net cash flowsNew leasesDividends declaredForeign exchange impactOtherBalance
Dec. 31, 2018
Long-term debt and finance lease
obligations
3,707  (540) 10  —  95  (5) 3,267  
Dividends payable (common and
preferred)
34  (86) —  107  —   58  
Total liabilities from financing activities3,741  (626) 10  107  95  (2) 3,325