CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net earnings	$ 1,436.8us-gaap_ProfitLoss	$ 1,532.8us-gaap_ProfitLoss	$ 1,923.4us-gaap_ProfitLoss
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	392.5	410.6	419.8
Deferred income taxes	18.5us-gaap_DeferredIncomeTaxExpenseBenefit	(34.3)us-gaap_DeferredIncomeTaxExpenseBenefit	(138.4)us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation expense	16.6us-gaap_ShareBasedCompensation	12.6us-gaap_ShareBasedCompensation	11.9us-gaap_ShareBasedCompensation
Excess tax benefit from stock-based compensation	(8.7)	(13.5)	(36.1)
Unrealized loss (gain) on derivatives	119.2	(59.3)	(78.8)
Gain on sale of phosphate business	(750.1)us-gaap_GainLossOnSaleOfBusiness	0us-gaap_GainLossOnSaleOfBusiness	0us-gaap_GainLossOnSaleOfBusiness
Loss on disposal of property, plant and equipment	3.7	5.6	5.5
Undistributed earnings of affiliates—net of taxes	(11.5)	(11.3)	(14.9)
Changes in:
Accounts receivable—net	36.1	0.4	53.2
Inventories	63.8us-gaap_IncreaseDecreaseInInventories	(80.3)us-gaap_IncreaseDecreaseInInventories	34.8us-gaap_IncreaseDecreaseInInventories
Accrued and prepaid income taxes	(56.8)	(153.4)	58.7
Accounts payable and accrued expenses	(53.2)	49.5	25.5
Customer advances	204.8	(260.1)	123.3
Margin deposits	0	0	0.8
Other—net	(3.1)	67.5	(13.1)
Net cash provided by operating activities	1,408.6	1,466.8	2,375.6
Investing Activities:
Additions to property, plant and equipment	(1,808.5)	(823.8)	(523.5)
Proceeds from sale of property, plant and equipment	11.0	12.6	17.0
Proceeds from sale of phosphate business	1,372.0	0	0
Sales and maturities of short-term and auction rate securities	5.0	13.5	48.4
Canadian terminal acquisition	0	(72.5)	0
Deposits to restricted cash funds	(505.0)us-gaap_IncreaseInRestrictedCash	(154.0)us-gaap_IncreaseInRestrictedCash	0us-gaap_IncreaseInRestrictedCash
Withdrawals from restricted cash funds	573.0us-gaap_DecreaseInRestrictedCash	0us-gaap_DecreaseInRestrictedCash	0us-gaap_DecreaseInRestrictedCash
Deposits to asset retirement obligation funds	0	(2.9)	(55.4)
Other—net	9.0	7.8	0
Net cash used in investing activities	(343.5)	(1,019.3)	(513.5)
Financing Activities:
Proceeds from long-term borrowings	1,494.2	1,498.0	0
Financing fees	(16.0)us-gaap_PaymentsOfFinancingCosts	(14.5)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Purchases of treasury stock	(1,934.9)	(1,409.1)	(500.0)
Acquisitions of noncontrolling interests in CFL	0	918.7	0
Dividends paid on common stock	(255.7)us-gaap_PaymentsOfDividendsCommonStock	(129.1)us-gaap_PaymentsOfDividendsCommonStock	(102.7)us-gaap_PaymentsOfDividendsCommonStock
Distributions to noncontrolling interest	(46.0)	(73.7)	(231.8)
Issuances of common stock under employee stock plans	17.6	10.3	14.6
Excess tax benefit from stock-based compensation	8.7	13.5	36.1
Payments of long-term debt	0us-gaap_RepaymentsOfLongTermDebt	0us-gaap_RepaymentsOfLongTermDebt	(13.0)us-gaap_RepaymentsOfLongTermDebt
Advances from unconsolidated affiliates	0us-gaap_ProceedsFromRelatedPartyDebt	0us-gaap_ProceedsFromRelatedPartyDebt	40.5us-gaap_ProceedsFromRelatedPartyDebt
Repayments of advances from unconsolidated affiliates	0us-gaap_RepaymentsOfRelatedPartyDebt	0us-gaap_RepaymentsOfRelatedPartyDebt	(40.5)us-gaap_RepaymentsOfRelatedPartyDebt
Other—net	(43.0)	43.0	0
Net cash used in financing activities	(775.1)	(980.3)	(796.8)
Effect of exchange rate changes on cash and cash equivalents	(4.2)	(31.3)	2.6
Increase (decrease) in cash and cash equivalents	285.8	(564.1)	1,067.9
Cash and cash equivalents at beginning of period	1,710.8	2,274.9	1,207.0
Cash and cash equivalents at end of period	$ 1,996.6	$ 1,710.8	$ 2,274.9

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The cash inflow associated with the aggregate amount received by the entity through the sale or maturity of short-term investments.

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The net change in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

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Amount of cash inflow associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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The effect of exchange rate changes on cash balances in continuing operations held in foreign currencies.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.

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The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction.

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The increase (decrease) during the reporting period in the amount of prepayments by customers for goods or services to be provided at a later date.

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The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The increase (decrease) during the reporting period in money or securities placed with a broker or counterparty as security for a trading or derivative position.

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Amount of cash outflow associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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The increase (decrease) in cash associated with the entity's continuing operating, investing, and financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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No definition available.

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example, cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.

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The cash outflow for loan and debt issuance costs.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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