This item represents the entity's proportionate share for the period of the net income (loss) of its operating investees (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investees at the date of investment.

No definition available.

Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019
Equity method investments
Tax Adjustments, Settlements, and Unusual Provisions		$ 7.0	$ (10.0)	$ 0.0	$ 0.0
Less: Net earnings attributable to noncontrolling interests			153.0	138.0	92.0
Aggregate amount of tax assessment			33.0	29.0
Gain on Sale of Equity Investments	$ (14.0)
Investments in and advances to affiliates			88.0	93.0
Equity in earnings of operating affiliates:
Total equity in earnings of operating affiliates			$ (5.0)	36.0	9.0
Operating equity method investments \| Point Lisas Nitrogen Limited (PLNL)
Equity method investments
Ownership interest (as a percent)			50.00%
Equity Method Investments			$ 88.0
Equity in earnings of operating affiliates:
Carrying value of investments in excess of the entity's share of the affiliates' book value			$ 45.0
Obligation to purchase ammonia (description)			50% of the ammonia produced by PLNL
Unrecorded Unconditional Purchase Obligation, Purchases			$ 69.0	86.0	$ 76.0
The Board of Inland Revenue \| Operating equity method investments \| Point Lisas Nitrogen Limited (PLNL)
Equity method investments
Gain Related to Litigation Settlement				$ (19.0)
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority			16.0
Tax assessment amount			$ 12.0
Point Lisas Nitrogen Limited (PLNL) \| The Board of Inland Revenue
Equity method investments
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority						$ 32.0
Property, Plant and Equipment \| Maximum \| Operating equity method investments
Equity in earnings of operating affiliates:
Finite Lived Tangible and Intangible Assets Revaluation Increased Basis Depreciation Period			13 years