
($ in millions)	December 31, 2023						December 31, 2022
	Face Value (US$)		Fair Value (CAD$)		Carrying Value (CAD$)		Face Value (US$)		Fair Value (CAD$)		Carrying Value (CAD$)
3.75% notes due February 2023 (a)(i)	$	—	$	—	$	—	$	108	$	147	$	147
3.9% notes due July 2030 (a)(iii)	503		621		658		503		614		673
6.125% notes due October 2035 (a)(iii)(iv)	336		467		439		336		452		449
6.0% notes due August 2040 (a)(iv)	473		642		624		480		631		648
6.25% notes due July 2041 (a)(iii)(iv)	396		544		519		396		531		531
5.2% notes due March 2042 (a)(iii)	395		488		516		395		471		529
5.4% notes due February 2043 (a)(iii)	367		466		481		367		448		492
	2,470		3,228		3,237		2,585		3,294		3,469
QB2 project financing facility (b)	2,206		2,979		2,873		2,500		3,419		3,322
Carmen de Andacollo short-term loans (c)	95		126		126		52		71		71
Antamina loan agreement (d)	225		298		298		225		305		305
	$	4,996	$	6,631	$	6,534	$	5,362	$	7,089	$	7,167
Less current portion of debt	(389)		(515)		(515)		(454)		(616)		(616)
	$	4,607	$	6,116	$	6,019	$	4,908	$	6,473	$	6,551

The fair values of debt are determined using market values, if available, and discounted cash flows based on our cost of borrowing where market values are not available. The latter are considered Level 2 fair value measurements with significant other observable inputs on the fair value hierarchy (Note 32).

All of our outstanding notes are redeemable at any time by repaying the greater of the principal amount and the present value of the sum of the remaining scheduled principal and interest amounts discounted at a comparable treasury yield plus a stipulated spread, plus, in each case, accrued interest to, but not including, the date of redemption. In addition, all of our outstanding notes, except for notes due October 2035, are callable at 100% (plus accrued interest to, but not including, the date of redemption) within three to six months of maturity.

iii) In 2022, we purchased US$93 million aggregate principal amount of our outstanding notes pursuant to an open market purchase. The principal amount of the notes purchased comprised US$47 million of the 3.9% notes due 2030, US$24 million of the 6.125% notes due 2035, US$8 million of the 6.25% notes due 2041, US$4 million of the 5.2% notes due 2042 and US$10 million of the 5.4% notes due 2043. The total cost of the purchases, which was funded from cash on hand, including the discounts and accrued interest was $120 million (US$90 million). We recorded a pre-tax gain of $5 million in non-operating income (expense) (Note 12) in connection with these purchases.

iv) In 2022, we also purchased US$650 million aggregate principal amount of our outstanding notes pursuant to cash tender offers. The principal amount of the notes purchased comprised US$249 million of the 6.125% notes due 2035, US$10 million of the 6.0% notes due 2040, and US$391 million of the 6.25% notes due 2041. The total cost of the purchases, which was funded from cash on hand, including the premiums and accrued interest was $909 million (US$703 million). We recorded a pre-tax expense of $63 million in non-operating income (expense) (Note 12) in connection with these purchases.

As at December 31, 2023, the limited recourse QB2 project financing facility had a balance of US$2.2 billion. Amounts drawn under the facility bear interest at Term SOFR plus applicable margins that vary over time. The facility will be repaid in 15 remaining semi-annual instalments, with the first and second repayments of US$147 million made on June 15, 2023 and December 15, 2023 respectively. The facility is guaranteed pre-completion on a several basis by Teck and SMM/SC pro rata to the respective equity interests in the Series A shares of QBSA. The facility is secured by pledges of Teck’s and SMM/SC’s interests in QBSA and by security over QBSA’s assets, which consist primarily of QB2 project assets.

As at December 31, 2023, we had $126 million (US$95 million) of debt outstanding in the form of fixed rate short-term bank loans with maturities of less than one year. The purpose of the loans is to fund the short-term working capital requirements at Carmen de Andacollo.

On July 12, 2021, Antamina entered into a US$1.0 billion loan agreement, which was fully drawn as at December 31, 2023. Our 22.5% share of the principal value of the loan is US$225 million. Amounts outstanding under this facility bear interest at Term SOFR plus an applicable margin. The loan is non-recourse to us and the other Antamina owners and matures in 2026.

We maintain a US$4.0 billion sustainability-linked revolving credit facility maturing October 2026. The facility has pricing adjustments where the cost will increase, decrease or remain unchanged based on our sustainability performance. Our sustainability performance over the term of the facility is measured by non-financial variables that are specific to our greenhouse gas emissions intensity, the percentage of women in our workforce and our high-potential safety incidents.

As at December 31, 2023, the facility was undrawn. Any amounts drawn under this facility can be repaid at any time and are due in full at maturity. Amounts outstanding under the facility bear interest at Term SOFR plus an applicable margin based on credit ratings and our sustainability performance, as described above. As defined in the agreement, this facility requires our total net debt-to-capitalization ratio, which was 0.20 to 1.0 at December 31, 2023, not to exceed 0.60 to 1.0 (Note 33). This facility does not have an earnings or cash flow-based financial covenant, a credit rating trigger or a general material adverse effect borrowing condition.

We maintain uncommitted bilateral credit facilities primarily for the issuance of letters of credit to support our future reclamation obligations. As at December 31, 2023, we had $2.6 billion of letters of credit outstanding.


($ in millions)	US$				CAD$ Equivalent
	2023		2022		2023		2022
As at January 1	$	5,292	$	5,816	$	7,167	$	7,374
Cash flows
Proceeds from debt	170		445		230		569
Redemption, purchase or repayment of debt	(530)		(1,026)		(710)		(1,323)
Non-cash changes
Loss on debt redemption or purchase (Note 12)	—		45		—		58
Changes in foreign exchange rates	—		—		(164)		474
Finance fees, discount amortization and other	8		12		11		15
As at December 31	$	4,940	$	5,292	$	6,534	$	7,167

In conjunction with the subscription arrangement with SMM/SC, QBSA entered into a subordinated loan facility agreement with SMM/SC to advance QBSA up to US$1.3 billion. In 2022, QBSA entered into a second subordinated loan facility agreement with SMM/SC to advance QBSA up to an additional US$750 million. In 2023, QBSA entered into a third and fourth subordinated shareholder loan facility agreement with SMM/SC to advance QBSA up to an additional US$580 million and US$395 million, respectively. The second, third and fourth subordinated loan facilities contain similar terms to the original subordinated loan facility. The advances for all four facility agreements are due to be repaid in full at maturity on January 15, 2038. Amounts outstanding under the facilities bear interest at Term SOFR plus applicable margins that vary over time.

As at December 31, 2023, the original US$1.3 billion and the second US$750 million subordinated shareholder loan facilities were fully drawn, US$578 million was outstanding under the third subordinated shareholder loan facility and the fourth subordinated shareholder loan facility remains undrawn.


($ in millions)	December 31, 2023						December 31, 2022
	Face Value (US$)		Fair Value (CAD$)		Carrying Value (CAD$)		Face Value (US$)		Fair Value (CAD$)		Carrying Value (CAD$)
QB2 advances from SMM/SC	$	2,661	$	3,589	$	3,497	$	1,693	$	2,330	$	2,279

The fair value of the advances is determined using discounted cash flows based on our cost of borrowing. This is considered a Level 2 fair value measurement with significant observable inputs on the fair value hierarchy (Note 32).


($ in millions)	US$				CAD$ Equivalent
	2023		2022		2023		2022
As at January 1	$	1,683	$	997	$	2,279	$	1,263
Cash flows
Advances	960		685		1,292		899
Non-cash changes
Finance fee amortization	1		1		1		1
Changes in foreign exchange rates	—		—		(75)		116
As at December 31	$	2,644	$	1,683	$	3,497	$	2,279