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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating Activities:    
Net earnings $ 238 $ 650
Adjustments to reconcile net earnings to net cash provided by operating activities:    
Depreciation and amortization 253 206
Deferred income taxes (11) (26)
Stock-based compensation expense 13 12
Unrealized net gain on natural gas derivatives (33) (72)
Gain on sale of emission credits 0 (35)
Loss on disposal of property, plant and equipment 5 0
Undistributed earnings of affiliate—net of taxes (2) (7)
Changes in assets and liabilities:    
Accounts receivable—net (50) 101
Inventories 20 39
Accrued and prepaid income taxes 61 153
Accounts payable and accrued expenses (23) (135)
Customer advances (25) 55
Other—net (1) 6
Net cash provided by operating activities 445 947
Investing Activities:    
Additions to property, plant and equipment (98) (69)
Purchase of emission credits (2) 0
Proceeds from sale of emission credits 0 35
Net cash used in investing activities (100) (34)
Financing Activities:    
Dividends paid on common stock (97) (79)
Distributions to noncontrolling interest (144) (255)
Purchases of treasury stock (339) (54)
Proceeds from issuances of common stock under employee stock plans 1 0
Shares withheld for taxes (23) (22)
Net cash provided by (used in) financing activities (602) (410)
Effect of exchange rate changes on cash and cash equivalents (2) (1)
(Decrease) increase in cash and cash equivalents (259) 502
Cash and cash equivalents at beginning of period 2,032 2,323
Cash and cash equivalents at end of period $ 1,773 $ 2,825