Segment Disclosures (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Segment Reporting [Abstract]
Number of reportable segments disclosed by definition flag	Ammonia, Granular Urea, UAN, AN and Other
Segment data
Net sales	$ 1,986	$ 1,663
Natural gas, including the impact of realized derivatives	397	334
Unrealized net mark-to-market (gain) loss on natural gas derivatives	(3)	2
Depreciation and amortization	228	220
Distribution and storage	58	53
Freight	79	81
Other segment items	481	401
Cost of sales	1,240	1,091
Gross margin	746	572
Other operating (income) expense—net	(111)	121
Equity in earnings of operating affiliate	6	4
Operating earnings	863	455
Depreciation and amortization	228	221
Goodwill	2,492		$ 2,493
Effect of exchange rate changes	(1)
Waggaman Ammonia Production Facility | Supply Contracts
Segment data
Depreciation and amortization	8	7
Ammonia
Segment data
Net sales	627	520
Natural gas, including the impact of realized derivatives	136	110
Unrealized net mark-to-market (gain) loss on natural gas derivatives	(1)	1
Depreciation and amortization	69	55
Distribution and storage	39	37
Freight	15	15
Other segment items	142	116
Cost of sales	400	334
Gross margin	227	186
Goodwill	980		981
Effect of exchange rate changes	(1)
Granular Urea
Segment data
Net sales	590	439
Natural gas, including the impact of realized derivatives	130	95
Unrealized net mark-to-market (gain) loss on natural gas derivatives	1	0
Depreciation and amortization	76	71
Distribution and storage	4	3
Freight	11	7
Other segment items	115	90
Cost of sales	335	266
Gross margin	255	173
Goodwill	828		828
Effect of exchange rate changes	0
UAN
Segment data
Net sales	583	470
Natural gas, including the impact of realized derivatives	113	104
Unrealized net mark-to-market (gain) loss on natural gas derivatives	(1)	1
Depreciation and amortization	64	73
Distribution and storage	15	13
Freight	36	36
Other segment items	106	101
Cost of sales	333	328
Gross margin	250	142
Goodwill	576		576
Effect of exchange rate changes	0
AN
Segment data
Net sales	58	101
Natural gas, including the impact of realized derivatives	1	10
Depreciation and amortization	3	8
Freight	3	7
Other segment items	62	60
Cost of sales	69	85
Gross margin	(11)	16
Goodwill	69		69
Effect of exchange rate changes	0
Other
Segment data
Net sales	128	133
Natural gas, including the impact of realized derivatives	17	15
Depreciation and amortization	16	13
Freight	14	16
Other segment items	56	34
Cost of sales	103	78
Gross margin	25	55
Goodwill	39		$ 39
Effect of exchange rate changes	0
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment data
Depreciation and amortization	$ 8	$ 8