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Discontinued operations (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of analysis of single amount of discontinued operations [abstract]  
Disclosure of detailed information on discontinued operations
The following table summarizes the carrying value of the assets and liabilities sold:

2020
Contract assets 1 
Contract costs 2 
Property, plant and equipment 484 
Intangible assets 227 
Goodwill 115 
Total assets sold 829 
Long-term debt 113 
Deferred tax liability 37 
Other non-current liabilities 9 
Total liabilities sold 159 
Net assets sold 670 



The following tables summarize the income statements and statements of cash flows of our discontinued operations up to the point of sale.

FOR THE YEAR ENDED DECEMBER 31 2020 2019
Operating revenues 118  171 
Operating costs (57) (71)
Depreciation (18) (38)
Amortization (7) (16)
Interest expense (6) (7)
Other expense (8) (6)
Income taxes (7) (4)
Net earnings attributable to common shareholders before gain on sale 15  29 
Gain on sale (net of taxes of $3 million)
 211  — 
Net earnings attributable to common shareholders 226  29 


FOR THE YEAR ENDED DECEMBER 31 2020 2019
Cash flows from operating activities 54  94 
Cash flows from (used in) investing activities 892  (18)
Cash flows used in financing activities (7) (6)
Net increase in cash 939  70