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Financial Instruments - Summary of Long Term Notes Payable (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 9,160,000,000 | $ 9,303,000,000
Notes payable [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | 6,511,000,000 | 6,203,000,000
Notes payable [member] | Other Notes Payable [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 31,000,000 | 4,000,000
Notes payable [member] | CEMEX SAB de CV November 2029 Notes [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Nov. 19, 2019 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 1,000 |
Rate | 5.45% |
Maturity date | Nov. 19, 2029 |
Long term borrowings | $ 993,000,000 | 992,000,000
Notes payable [member] | CEMEX SAB de CV November 2029 Notes [Member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 1,000,000,000 |
Notes payable [member] | CEMEX, S.A.B. de C.V. April 2026 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Mar. 16, 2016 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 1,000 |
Rate | 7.75% |
Maturity date | Apr. 16, 2026 |
Long term borrowings | $ 997,000,000 | 996,000,000
Notes payable [member] | CEMEX, S.A.B. de C.V. April 2026 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 1,000,000,000 |
Notes payable [member] | CEMEX SAB de CV March 2026 Notes [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Mar. 19, 2019 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Euro |
Principal amount | $ 400 |
Rate | 3.125% |
Maturity date | Mar. 19, 2026 |
Long term borrowings | $ 487,000,000 | 446,000,000
Notes payable [member] | CEMEX SAB de CV March 2026 Notes [Member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 449,000,000 |
Notes payable [member] | CEMEX Materials, LLC July 2025 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Apr. 02, 2003 |
Issuer | CEMEX Materials LLC |
Currency | Dollar |
Principal amount | $ 150 |
Rate | 7.70% |
Maturity date | Jul. 21, 2025 |
Long term borrowings | $ 153,000,000 | 154,000,000
Notes payable [member] | CEMEX Materials, LLC July 2025 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 150,000,000 |
Notes payable [member] | CEMEX, S.A.B. de C.V. March 2025 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Mar. 03, 2015 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 750 |
Rate | 6.125% |
Maturity date | May 05, 2025 |
Repurchased amount | $ (750,000,000) |
Long term borrowings |  | 748,000,000
Notes payable [member] | CEMEX, S.A.B. de C.V. January 2025 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Sep. 11, 2014 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 1,100 |
Rate | 5.70% |
Maturity date | Jan. 11, 2025 |
Repurchased amount | $ (29,000,000) |
Long term borrowings | 1,069,000,000 | 1,069,000,000
Notes payable [member] | CEMEX, S.A.B. de C.V. January 2025 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 1,071,000,000 |
Notes payable [member] | CEMEX, SAB. de CV. December 2024 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Dec. 05, 2017 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Euro |
Principal amount | $ 650 |
Rate | 2.75% |
Maturity date | Dec. 05, 2024 |
Long term borrowings | $ 792,000,000 | 726,000,000
Notes payable [member] | CEMEX, SAB. de CV. December 2024 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 729,000,000 |
Notes payable [member] | CEMEX Finance LLC June 2024 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Jun. 14, 2016 |
Issuer | CEMEX Finance LLC |
Currency | Euro |
Principal amount | $ 400 |
Rate | 4.625% |
Maturity date | Jun. 15, 2024 |
Repurchased amount | $ (400,000,000) |
Long term borrowings |  | 447,000,000
Notes payable [member] | CEMEX Finance LLC April 2024 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Apr. 01, 2014 |
Issuer | CEMEX Finance LLC |
Currency | Dollar |
Principal amount | $ 1,000 |
Rate | 6.00% |
Maturity date | Apr. 01, 2024 |
Repurchased amount | $ (1,000,000,000) |
Long term borrowings |  | $ 621,000,000
Notes payable [member] | CEMEX SAB de CV September 2030 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Sep. 17, 2020 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 1,000 |
Rate | 5.20% |
Maturity date | Sep. 17, 1930 |
Long term borrowings | $ 995,000,000 |
Notes payable [member] | CEMEX SAB de CV September 2030 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 1,000,000,000 |
Notes payable [member] | CEMEX SAB de CV June 2027 Notes [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Date of issuance | Jun. 05, 2020 |
Issuer | CEMEX, S.A.B. de C.V. |
Currency | Dollar |
Principal amount | $ 1,000 |
Rate | 7.375% |
Maturity date | Jun. 05, 2027 |
Long term borrowings | $ 994,000,000 |
Notes payable [member] | CEMEX SAB de CV June 2027 Notes [member] | Cost [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Long term borrowings | $ 1,000,000,000 |

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