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Supplemental Disclosure of Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2021
Statement Of Cash Flows, Additional Disclosures [Abstract]  
Schedule of cash flow supplemental disclosures
 
2021

2020

2019
Changes in non-cash working capital:
 

 

 
Accounts receivable
$(850)

$284 

$(1,310)
Current income tax (liabilities) assets
1,918 

(295)

(164)
Inventory
(487)

98 

(194)
Prepaids and other
39 

(56)

2 
Other long-term assets
— (117)117 
Accounts payable
80 

(147)

39 
Accrued liabilities
525 

(254)

265 
Other long-term liabilities (1)
(154)

(62)

(23)
Net changes in non-cash working capital
$1,071 $(549)$(1,268)
Relating to:
 
 
 
Operating activities
$964 

$(166)

$(1,033)
Investing activities
107 

(383)

(235)
 
$1,071 $(549)$(1,268)
 
2021

2020

2019
Expenditures on exploration and evaluation assets
$12 

$36 

$73 
Net proceeds on sale of exploration and evaluation assets
(11)

(31)

— 
Net expenditures on exploration and evaluation assets
$1 $5 $73 
(1)Included in Other long-term liabilities at December 31, 2021 is $48 million of deferred purchase consideration payable over the next two years (December 31, 2020 – $72 million; 2019 - $95 million).
Reconciliation of liabilities arising from financing activities
The following table summarizes movements in the Company's liabilities arising from financing activities for the years' ended December 31, 2021 and 2020:                                            
Long-term debt
Cash flow hedges on
US dollar debt securities
Lease liabilities
Liabilities from financing activities
At December 31, 2019$20,982 $(199)$1,809 $22,592 
Changes from financing cash flows:
Issue of long-term debt, net (1)
719 — — 719 
Repayment of Painted Pony long-term debt(397)— — (397)
Proceeds on settlement of cross currency swaps— 166 — 166 
Payment of lease liabilities
— — (225)(225)
Non-cash changes:
Assumption of Painted Pony long-term debt397 — — 397 
Lease additions
— — 148 148 
Changes in foreign exchange and fair value (2)
(248)5 (42)(285)
At December 31, 2020
21,453 (28)1,690 23,115 
Changes from financing cash flows:
Repayment of long-term debt, net (1)
(6,779)— — (6,779)
Repayment of Storm long-term debt(183)— — (183)
Payment of lease liabilities
— — (209)(209)
Non-cash changes:
Assumption of Storm long-term debt183 — — 183 
Lease additions
— — 88 88 
Changes in foreign exchange and fair value (2)
20 (91)15 (56)
At December 31, 2021
$14,694 $(119)$1,584 $16,159 
(1)Includes original issue discounts and premiums, and directly attributable transaction costs.
(2)Includes foreign exchange (gain) loss, changes in the fair value of cash flow hedges on US dollar debt securities, the amortization of original issue discounts and premiums and directly attributable transaction costs, and derecognition of lease liabilities.