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Investments - Narratives (Details) $ / shares in Units, $ / shares in Units, € in Millions, $ in Millions |  |  | 3 Months Ended | 9 Months Ended |  |  |
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Sep. 07, 2021 USD ($) | Sep. 07, 2021 CAD ($) | May 19, 2021 USD ($) | May 19, 2021 EUR (€) | Sep. 30, 2021 USD ($) $ / shares | Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CAD ($) | Sep. 30, 2021 USD ($) $ / shares | Sep. 07, 2021 $ / shares | Mar. 31, 2021 USD ($) | Oct. 31, 2017 $ / shares
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
(Decrease) increase in fair value of investments in equity securities |  |  |  |  |  |  |  |  | $ 1,200,000 |  |  |
New investments |  |  |  |  |  |  |  |  | 103,200,000 |  |  |
Fair value of investment |  |  |  |  | $ 179,800,000 |  | $ 78,900,000 |  | $ 179,800,000 |  |  |
Share price (usd per share) | $ / shares |  |  |  |  | $ 191.11 |  |  |  | $ 191.11 |  |  | $ 43.50
HTEC |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Share price (usd per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 24.33 |  |
Investment in Equity Securities Level 1 |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
(Decrease) increase in fair value of investments in equity securities |  |  |  |  | $ (6,000,000.0) |  |  |  | $ (25,800,000) |  |  |
New investments |  |  |  |  |  |  |  |  | 0 |  |  |
Fair value of investment |  |  |  |  | 25,700,000 |  | 53,800,000 |  | 25,700,000 |  |  |
Investment in Equity Securities, Level 2 |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
(Decrease) increase in fair value of investments in equity securities |  |  |  |  | (4,300,000) |  |  |  | 6,300,000 |  |  |
New investments |  |  |  |  |  |  |  |  | 0 |  |  |
Fair value of investment |  |  |  |  | $ 10,400,000 |  | 4,100,000 |  | $ 10,400,000 |  |  |
Earthly Labs Inc. |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
New investments |  |  |  |  |  | $ 5,000,000.0 |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  |  | 15.00% |  |  |  |  |  |
Transform Materials |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  |  |  |  |  |  |  | 5.00% |
Fair value of investment |  |  |  |  |  |  |  |  |  |  | $ 25,000,000.0 |
Svante Inc. |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  |  |  |  |  |  |  | 10.00% |
Fair value of investment |  |  |  |  |  |  |  |  |  |  | $ 15,000,000.0 |
Liberty LNG |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  | 25.00% |  |  |  | 25.00% |  |  |
Equity investments, carrying value |  |  |  |  | $ 2,400,000 |  | 2,100,000 |  | $ 2,400,000 |  |  |
Cryomotive GmbH |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
New investments |  |  | $ 7,900,000 | € 6.5 |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  | 24.90% | 24.90% |  |  |  |  |  |  |  |
Equity investments, carrying value |  |  |  |  | $ 7,200,000 |  |  |  | $ 7,200,000 |  |  |
HTEC | Corporate Joint Venture |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
(Decrease) increase in fair value of investments in equity securities | $ 20,700,000 |  |  |  |  |  |  |  |  |  |  |
New investments | $ 50,300,000 | $ 63.3 |  |  |  |  | $ 15,700,000 | $ 20.0 |  |  |  |
Equity investments, ownership interest (percent) | 25.00% |  |  |  |  |  | 15.60% |  |  |  |  |
Initial offering multiple rate | 3.5 |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Closing through third anniversary |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Put option internal rate of return (percent) | 10.00% |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | After third anniversary |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Put option internal rate of return (percent) | 12.50% |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Right of refusal compensation percentage (percent) | 102.00% |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Common Stock | Closing through third anniversary |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Invested capital multiple rate | 1.65 |  |  |  |  |  |  |  |  |  |  |
Percentage of shares allowed as consideration on trigger event (percent) | 7.00% |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Common Stock | After third anniversary |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Invested capital multiple rate | 1.65 |  |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Common Stock | After third anniversary | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares callable upon exercise of call option (percent) | 20.00% |  |  |  |  |  |  |  |  |  |  |
HTEC | ISQ | Corporate Joint Venture |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
New investments |  | $ 153.0 |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) | 35.00% |  |  |  |  |  |  |  |  |  |  |
Hudson Products de Mexico S.A. de CV | Investment in Joint Venture |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest (percent) |  |  |  |  | 50.00% |  | 50.00% |  | 50.00% |  |  |
Equity investments, carrying value |  |  |  |  | $ 3,000,000.0 |  | $ 2,800,000 |  | $ 3,000,000.0 |  |  |
ISQ | Corporate Joint Venture | Closing through third anniversary |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |
Shareholder distribution threshold | $ 900,000,000 |  |  |  |  |  |  |  |  |  |  |

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