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FINANCING: (Tables)
12 Months Ended
Dec. 31, 2020
FINANCING:  
Schedule of long-term debt

Long-term debt (in millions):

Carrying

value as of

Face

Issuance

Issuance

December 31, 

    

amount

    

discount

    

costs

    

2020

3.500% Senior unsecured notes due 2022

 

$

300

(0.2)

$

(0.3)

$

299.5

3.875% Senior unsecured notes due 2025

 

 

500

(1.3)

(1.2)

 

497.5

9.250% Yankee bonds due 2028

 

 

51.2

 

51.2

7.500% Senior unsecured notes due 2035

 

 

1,000

(12.0)

(8.0)

 

980.0

6.750% Senior unsecured notes due 2040

1,100

(6.9)

(5.6)

1,087.5

5.250% Senior unsecured notes due 2042

 

 

1,200

(18.6)

(6.2)

 

1,175.2

5.875% Senior unsecured notes due 2045

 

 

1,500

(16.1)

(8.5)

1,475.4

4.500% Minera Mexico Senior unsecured notes due 2050

1,000

(12.5)

(9.6)

 

977.9

Total

$

6,651.2

$

(67.6)

$

(39.4)

 

6,544.2

Less, current portion

 

Total long-term debt

$

6,544.2

    

    

    

    

Carrying

value as of

Face

Issuance

Issuance

December 31, 

amount

discount

costs

2019

5.375% Senior unsecured notes due 2020

$

400

(0.1)

$

(0.1)

$

399.8

3.500% Senior unsecured notes due 2022

 

300

(0.3)

(0.5)

 

299.2

3.875% Senior unsecured notes due 2025

 

500

(1.6)

(1.5)

 

496.9

9.250% Yankee bonds due 2028

 

51

 

51.2

7.500% Senior unsecured notes due 2035

 

1,000

(12.4)

(8.3)

 

979.3

6.750% Senior unsecured notes due 2040

 

1,100

(7.1)

(5.7)

 

1,087.2

5.250% Senior unsecured notes due 2042

1,200

(19.0)

(6.3)

1,174.7

5.875% Senior unsecured notes due 2045

 

1,500

(16.4)

(8.6)

 

1,475.0

4.500% Minera Mexico Senior unsecured notes due 2050

 

1,000

(12.7)

(9.8)

 

977.5

Total

$

7,051

$

(69.6)

$

(40.8)

 

6,940.8

Less, current portion

 

(399.8)

Total long-term debt

$

6,541.0

Schedule of aggregate maturities of the outstanding borrowings

    

Principal

Years

Due(*)

(in millions)

2021

 

$

2022

300.0

2023

 

2024

 

2025

500.0

Thereafter

 

5,851.2

Total

$

6,651.2

(*)Total debt maturities do not include the debt discount valuation account of $107.0 million.