Represents the number of additional exploration tenements.

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- Definition

The amount funded by the company.

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- Definition

The annual inflation factor rate.

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- Definition

Represents the capitalized costs for the project.

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Cumulative amount funded by the company.

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Represents the deposit funded on a pro-rata basis.

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Represents the deposit provided to acquiree.

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- Definition

First Quantum additional interest percent in project acquired from LS-Nikko Copper Inc.

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First Quantum's initial interest percent in original stream.

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- Definition

The gold and silver purchase price upon delivery threshold 2 percent.

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Current purchase price per ounce of gold upon delivery.

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Purchase price per ounce of Gold as a percent of average or spot price upon delivery under Threshold 2 after the delivery of the initial committed ounces.

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No definition available.

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- Definition

KORES interest percent in project.

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No definition available.

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- Definition

The number of distinct precious metals streams.

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Quantity of delivered gold ounces before purchase price decreases to next threshold from initial threshold.

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No definition available.

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Quantity of delivered gold ounces before payable production to be purchased decreases to next threshold from Threshold 2.

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No definition available.

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- Definition

Quantity of delivered Silver ounces before purchase price decreases to next threshold from initial threshold.

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No definition available.

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Quantity of delivered Silver ounces before payable production to be purchased decreases to next threshold from Threshold 2.

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No definition available.

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- Definition

The ownership percentage of the project by First Quantum.

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No definition available.

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- Definition

The ownership percentage of project by KORES.

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- Definition

Percent of payable Gold and Silver production to be purchased after a certain quantity of Silver is initially delivered under Threshold 2.

+ References

No definition available.

+ Details

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- Definition

The percentage of the project covered by the amended and restated agreement.

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No definition available.

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- Definition

Represents the royalty rate per Tonne.

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No definition available.

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- Definition

Current purchase price per ounce of silver upon delivery.

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No definition available.

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- Definition

Purchase price per ounce of Silver as a percent of average or spot price upon delivery under Threshold 2 after the delivery of the initial committed ounces.

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No definition available.

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- Definition

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

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The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. [Refer: Revenue]

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Acquisitions and other transactions (Details) $ in Millions			3 Months Ended
Acquisitions and other transactions (Details) $ in Millions	Feb. 28, 2018 AUD ($) item	Jan. 19, 2018 USD ($) $ / oz item oz	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Feb. 20, 2018 USD ($)	Dec. 31, 2017 USD ($)
Acquisitions
Revenue			$ 173.1	$ 172.7
Amended and restated Cobre Panama Agreement
Acquisitions
Percentage of the project covered by the amended and restated agreement (as a percent)		100.00%
Ownership percentage of the project by First Quantum (as a percent)		90.00%
Ownership percentage of project by KORES (as a percent)		10.00%
Number of distinct precious metals streams \| item		2
Capitalized costs for the project			1,159.9
Amended and restated Cobre Panama Agreement - Fixed Payment Stream
Acquisitions
First Quantum's initial interest percent in original stream (as a percent)		80.00%
Payment for each ounce of gold (in dollars per ounce) \| $ / oz		418
Payment for each ounce of silver (in dollars per ounce) \| $ / oz		6.27
The annual inflation factor rate (as a percent)		1.50%
Quantity of delivered gold ounces before purchase decreases to next threshold from initial threshold \| oz		1,341,000
Maximum ounces of silver on which on-going price of spot price is payable \| oz		21,500,000
Percentage of spot price of gold on which on-going price is paid after maximum ounces have been delivered		50.00%
Percentage of spot price of silver on which on-going price is paid after maximum ounces have been delivered		50.00%
Deposit funded on a pro-rata basis		33.33%
Amount funded by the company			70.2
Cumulative amount funded by the company			796.8
Amended and restated Cobre Panama Agreement - Fixed Payment Stream \| Top
Acquisitions
Deposit provided to acquiree		$ 1,000.0
Amended and restated Cobre Panama Agreement - Floating Payment Stream
Acquisitions
First Quantum additional interest percent in project acquired from LS-Nikko Copper Inc. (as a percent)		10.00%
KORES interest percent in project (as a percent)		10.00%
Percentage of spot price of gold and silver on which on-going price is paid		20.00%
Maximum ounces of gold on which on-going price of spot price is payable \| oz		604,000
Maximum ounces of silver on which on-going price of spot price is payable \| oz		9,618,000
Percentage of spot price of gold and silver on which on-going price is paid after maximum ounces have been delivered		50.00%
Amount funded by the company		$ 356.0
Bowen Basin Coal Royalties, Australia
Acquisitions
Number of additional exploration tenements \| item	33
Cash transferred	$ 4,200,000
Royalty rate per tonne	$ 0.10
U.S. Oil & Gas Royalties - Delaware Texas
Acquisitions
Consideration transferred					$ 101.3
Revenue			$ 1.3
Deposit provided to acquiree						$ 11.0