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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Activities:      
Net earnings $ 1,260.0 $ 432.0 $ 646.0
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Depreciation and amortization 888.0 892.0 875.0
Deferred income taxes (196.0) (74.0) 149.0
Stock-based compensation expense 30.0 25.0 28.0
Unrealized net loss (gain) on natural gas derivatives 25.0 (6.0) 14.0
Loss on embedded derivative 1.0 3.0 4.0
Loss on debt extinguishment 19.0 0.0 21.0
Goodwill impairment 285.0 0.0 0.0
Long-lived and intangible asset impairment 236.0 0.0 0.0
Gain on sale of emission credits (49.0) 0.0 0.0
Loss (gain) on disposal of property, plant and equipment 3.0 15.0 (40.0)
Undistributed (earnings) losses of affiliate—net of taxes (6.0) (1.0) 2.0
Changes in:      
Accounts receivable—net (235.0) (19.0) (6.0)
Inventories (123.0) 27.0 (26.0)
Accrued and prepaid income taxes 94.0 8.0 22.0
Accounts payable and accrued expenses 142.0 (15.0) (72.0)
Customer advances 570.0 11.0 (30.0)
Other—net (71.0) (67.0) (82.0)
Net cash provided by operating activities 2,873.0 1,231.0 1,505.0
Investing Activities:      
Additions to property, plant and equipment (514.0) (309.0) (404.0)
Proceeds from sale of property, plant and equipment 1.0 2.0 70.0
Distributions received from unconsolidated affiliate 0.0 6.0 0.0
Insurance proceeds for property, plant and equipment 0.0 2.0 15.0
Purchase of investments held in nonqualified employee benefit trust (13.0) 0.0 0.0
Proceeds from sale of investments held in nonqualified employee benefit trust 12.0 0.0 0.0
Purchase of U.K. emission credits (10.0) 0.0 0.0
Proceeds from sale of emission credits 58.0 0.0 0.0
Net cash used in investing activities (466.0) (299.0) (319.0)
Financing Activities:      
Payments of long-term borrowings (518.0) 0.0 (769.0)
Proceeds from short-term borrowings 0.0 500.0 0.0
Repayments of short-term borrowings 0.0 (500.0) 0.0
Payment to CHS related to credit provision (5.0) (5.0) (5.0)
Financing fees 0.0 0.0 (3.0)
Purchases of treasury stock (539.0) (100.0) (370.0)
Dividends paid on common stock (260.0) (258.0) (265.0)
Distributions to noncontrolling interest (194.0) (174.0) (186.0)
Proceeds from issuances of common stock under employee stock plans 64.0 5.0 19.0
Cash paid for shares withheld for taxes (11.0) (10.0) (4.0)
Net cash used in financing activities (1,463.0) (542.0) (1,583.0)
Effect of exchange rate changes on cash and cash equivalents 1.0 6.0 2.0
Increase (decrease) in cash and cash equivalents 945.0 396.0 (395.0)
Cash and cash equivalents $ 1,628.0 $ 683.0 $ 287.0