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Goodwill (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) product	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Goodwill [Line Items]
Impairment of goodwill	$ 41	$ 0	$ 41	$ 0
Nitrogen Fertilizer
Goodwill [Line Items]
Goodwill					$ 41
Number of primary products experiencing significant pricing declines | product	2

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- Definition

Goodwill, Impairment, Number Of Primary Products Experiencing Significant Pricing Declines

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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