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Long-Term Debt - Additional Information (Details) $ in Thousands, € in Millions |  |  |  | 3 Months Ended | 12 Months Ended | 15 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2019 USD ($) | Aug. 14, 2019 USD ($) | Oct. 15, 2014 USD ($) | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2020 | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2021 | Dec. 15, 2020 USD ($) | Nov. 25, 2019 USD ($) | Dec. 18, 2014 | Dec. 08, 2014 EUR (€) | Nov. 24, 2014 USD ($) | Jan. 22, 2014 USD ($) payment | May 29, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, 2020 |  |  |  |  |  |  | $ 804,700 |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, 2021 |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, 2022 |  |  |  |  |  |  | 223,900 |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, 2023 |  |  |  |  |  |  | 425,000 |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, 2024 |  |  |  |  |  |  | 610,800 |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities of long-term debt, thereafter |  |  |  |  |  |  | 1,328,000 |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  | 0 | $ 4,829 | $ 0 |  |  |  |  |  |  |  |
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months |  |  |  |  |  |  | 3,300 |  |  |  |  |  |  |  |  |  |
Revolving credit facility, remaining borrowings available |  |  |  |  |  |  | $ 1,180,000 |  |  |  |  |  |  |  |  |  |
Credit facility maturity date extension |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |
Mineral Resources Limited Wodgina Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage | 60.00% |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |
1.125% Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.01125% | 0.01125% |  |  |  | 1.125% |  |  |  |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  | 1.30% |  |  |  |  |
1.625% Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.01625% | 0.01625% |  |  |  | 1.625% |  |  |  |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  | 1.74% |  |  |  |  |
3.45% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.0345% | 0.0345% |  |  |  | 3.45% |  |  |  |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  | 3.58% |  |  |  |  |
Floating Rate Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |
Interest rate margin |  |  |  |  |  |  | 1.05% |  |  |  |  |  |  |  |  |  |
Interest rate during period |  |  |  |  |  |  | 1.271% |  |  |  |  |  |  |  |  |  |
4.50% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 4.50% |  |  |  |  |  |  |  |  |  |
1.875% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt | € |  |  |  |  |  |  |  |  |  |  |  |  |  | € 393.0 |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.01875% | 0.01875% |  |  |  |  | 1.875% | 1.875% |  |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.10% |  |  |
Other comprehensive income (loss) before reclassifications, before tax |  |  |  |  |  |  | $ (34,200) | $ 8,400 | $ 25,800 |  |  |  |  |  |  |  |
4.15% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 425,000 |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.0415% | 0.0415% |  |  |  |  |  |  | 4.15% |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.06% |  |
Number of semi annual coupon payments | payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 |
5.45% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 350,000 |  |
Debt instrument, interest rate |  |  |  |  |  |  | 0.0545% | 0.0545% |  |  |  |  |  |  | 5.45% |  |
Interest rate of debt, effective percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.50% |  |
Commercial Paper |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper notes |  |  |  |  |  |  | $ 325,000 |  |  |  |  |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  | 0.51% |  |  |  |  |  |  |  |  |  |
Debt instrument weighted average maturity period |  |  |  |  |  |  | 16 days |  |  |  |  |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 220,000 |  |  |  |  |  |  |  |  |  |
Credit facility, borrowings outstanding |  |  |  |  |  |  | $ 7,700 | $ 7,300 |  |  |  |  |  |  |  |  |
Average interest rate on borrowings |  |  |  |  |  |  | 0.36% | 0.36% | 0.69% |  |  |  |  |  |  |  |
Maximum | Commercial Paper |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000
Debt instrument, maturity term |  |  |  |  |  |  | 397 days |  |  |  |  |  |  |  |  |  |
2019 Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |
Repayment of 2019 Credit Facility |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity | $ 200,000 | $ 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, borrowings outstanding | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |
2019 Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  | 1.125% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  |  |  |  |  |  | 1.325% |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, borrowings outstanding |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |
2018 Credit Agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  | 0.91% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 Credit Agreement | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate margin |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 1,200,000 |  |  |  |  |  |  |  |  |  |
Debt covenant |  | 50000000000.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant Ratio, Maximum Debt to EBITDA |  | 3.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Facilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant Ratio, Maximum Debt to EBITDA |  |  |  |  |  | 4.00 |  |  |  |  |  |  |  |  |  |  |
Priority Debt Basket |  |  |  |  |  |  | 0.24 |  |  |  |  |  |  |  |  |  |
Credit Facilities [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant Ratio, Maximum Debt to EBITDA |  |  |  | 3.50 | 4.00 |  |  |  |  | 4.50 |  |  |  |  |  |  |
Interest Rate Swap | JP Morgan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 325,000 |
Payment for settlement of interest rate swap |  |  | $ 33,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of commercial paper |  |  |  |  |  |  | $ 370,000 |  |  |  |  |  |  |  |  |  |
Senior Notes | 4.50% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  | $ 175,200 |  |  |  |  |  |  |  |  |  |

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