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Debt (Tables) | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Long-Term Debt, Net of Unamortized Discount and Debt Issuance Costs | Long-term debt, net of an unamortized discount and debt issuance costs, consisted of the following:
| Original Principal |  | Annual Interest Rate |  | Maturity Date |  | March 31, 2021 |  | December 31, 2020
Prior Term Loan Facility, net of unamortized discount (1) | $ | 2,150 |  |  | Variable |  | 9/22/2024 |  | $ | — |  |  | $ | 1,607 |
New Term Loan Facility, net of unamortized discount (1) | 1,300 |  |  | Variable |  | 3/11/2028 |  | 1,291 |  |  | — |
Senior Notes due 2025 | 450 |  |  | 5.75 | % |  | 10/1/2025 |  | 450 |  |  | 450 |
Senior Notes due 2026 | 615 |  |  | 6.50 | % |  | 4/15/2026 |  | — |  |  | 615 |
Senior Notes due 2029 | 1,075 |  |  | 4.63 | % |  | 3/15/2029 |  | 1,075 |  |  | — |
6.5% Senior Secured Notes due 2025 | 500 |  |  | 6.50 | % |  | 5/1/2025 |  | 500 |  |  | 500 |
Standard Bank Term Loan Facility (1) (3) | 222 |  |  | Variable |  | 3/25/2024 |  | 88 |  |  | 115 |
Tikon Loan (3) | N/A |  | Variable |  | 5/23/2021 |  | 11 |  |  | 17 |
Australian Government Loan, net of unamortized discount | N/A |  | N/A |  | 12/31/2036 |  | 1 |  |  | 1 |
MGT Loan(2) | 36 |  | Variable |  | Variable |  | 35 |  |  | 36 |
Finance leases |  |  |  |  |  |  | 14 |  |  | 15 |
Long-term debt |  |  |  |  |  |  | 3,465 |  |  | 3,356 |
Less: Long-term debt due within one year |  |  |  |  |  |  | (514) |  |  | (58) |
Debt issuance costs |  |  |  |  |  |  | (50) |  |  | (35) |
Long-term debt, net |  |  |  |  |  |  | $ | 2,901 |  |  | $ | 3,263 |
_______________ (1)Average effective interest rate on the Prior Term Loan Facility of 4.5% and 5.0% during the three months ended March 31, 2021 and 2020, respectively. Average effective interest rate on the New Term Loan Facility of 4.3% during the three months ended March 31, 2021. Average effective interest rate on the Standard Bank Term Loan Facility of 6.5% and 9.5% during the three months ended March 31, 2021 and 2020, respectively. (2)The MGT loan is a related party debt facility. (3)During the three months ended March 31, 2021, the Company made two voluntary prepayments totaling R260 million (approximately $17 million at March 31, 2021 exchange rate) on the Standard Bank Term Loan Facility. No prepayment penalties were required as a result of this principal prepayment. During the three months ended March 31, 2021, the Company made a voluntary prepayment of CNY 41 million (approximately $6 million at March 31, 2021 exchange rate) on the Tikon Loan. Additionally, in April 2021, the Company made a voluntary prepayment totaling R780 million (approximately $53 million at March 31, 2021 exchange rate) on the Standard Bank Term Loan Facility and repaid the remaining outstanding principal balance of $11 million on the Tikon loan. No prepayment penalties were required as a result of these principal prepayments.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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