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Equity Method Investments (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Equity method investments |  |  |
Liability (refund) adjustment from settlement with taxing authority | $ (110) |  |
Operating equity method investments | Point Lisas Nitrogen Limited (PLNL) |  |  |
Equity method investments |  |  |
Ownership interest (as a percent) | 50.00% |  |
Equity Method Investments | $ 82 |  |
Carrying value of investments in excess of the entity's share of the affiliates' book value | $ 39 |  |
Obligation to purchase ammonia (description) | 50% of the ammonia produced by PLNL |  |
Unrecorded Unconditional Purchase Obligation, Purchases | $ 150 | $ 57 | $ 69
The Board of Inland Revenue | Operating equity method investments | Point Lisas Nitrogen Limited (PLNL) |  |  |
Equity method investments |  |  |
Liability (refund) adjustment from settlement with taxing authority |  |  | 16
Point Lisas Nitrogen Limited (PLNL) | The Board of Inland Revenue |  |  |
Equity method investments |  |  |
Liability (refund) adjustment from settlement with taxing authority |  |  | $ 32
Property, plant and equipment | Maximum | Operating equity method investments |  |  |
Equity method investments |  |  |
Finite Lived Tangible and Intangible Assets Revaluation Increased Basis Depreciation Period | 11 years |  |

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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