Subsequent Events	3 Months Ended
Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"></font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Subsequent Events </font></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Amendment to our Revolving Credit Facility</font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On [</font><font style="font-family:inherit;font-size:10pt;background-color:#ffff00;">May 6, 2020</font><font style="font-family:inherit;font-size:10pt;">], we entered into the First Amendment to the Credit Agreement (the “First Amendment”) with FMC Lithium USA Corp., the Guarantors, the Lenders and the Agent. Among other things, the First Amendment (i) increases our maximum net leverage ratio for the fiscal quarters ending June 30, 2020, September 30, 2020 and December 31, 2020 from </font><font style="font-family:inherit;font-size:10pt;">3.5</font><font style="font-family:inherit;font-size:10pt;"> to </font><font style="font-family:inherit;font-size:10pt;">6.0</font><font style="font-family:inherit;font-size:10pt;">, (ii) puts a cap of </font><font style="font-family:inherit;font-size:10pt;">$325 million</font><font style="font-family:inherit;font-size:10pt;"> on our overall borrowings under the Revolving Credit Facility until March 31, 2021, (iii) amends our negative covenant on indebtedness to permit unsecured indebtedness (including convertible debt) up to </font><font style="font-family:inherit;font-size:10pt;">$350 million</font><font style="font-family:inherit;font-size:10pt;"> and (iv) amends our negative covenants on investments to permit additional investments in Minera del Altiplano S.A., our Argentine subsidiary.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The foregoing description of the First Amendment does not purport to be complete and is qualified in its entirety by reference to the First Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 10-Q.</font></div></div>

Subsequent Events

3 Months Ended

Mar. 31, 2020

<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"></font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Subsequent Events </font></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Amendment to our Revolving Credit Facility</font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On [</font><font style="font-family:inherit;font-size:10pt;background-color:#ffff00;">May 6, 2020</font><font style="font-family:inherit;font-size:10pt;">], we entered into the First Amendment to the Credit Agreement (the “First Amendment”) with FMC Lithium USA Corp., the Guarantors, the Lenders and the Agent. Among other things, the First Amendment (i) increases our maximum net leverage ratio for the fiscal quarters ending June 30, 2020, September 30, 2020 and December 31, 2020 from </font><font style="font-family:inherit;font-size:10pt;">3.5</font><font style="font-family:inherit;font-size:10pt;"> to </font><font style="font-family:inherit;font-size:10pt;">6.0</font><font style="font-family:inherit;font-size:10pt;">, (ii) puts a cap of </font><font style="font-family:inherit;font-size:10pt;">$325 million</font><font style="font-family:inherit;font-size:10pt;"> on our overall borrowings under the Revolving Credit Facility until March 31, 2021, (iii) amends our negative covenant on indebtedness to permit unsecured indebtedness (including convertible debt) up to </font><font style="font-family:inherit;font-size:10pt;">$350 million</font><font style="font-family:inherit;font-size:10pt;"> and (iv) amends our negative covenants on investments to permit additional investments in Minera del Altiplano S.A., our Argentine subsidiary.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The foregoing description of the First Amendment does not purport to be complete and is qualified in its entirety by reference to the First Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 10-Q.</font></div></div>