Revenue Recognition - Revenue by Product and by Geography (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Net sales	$ 1,986	$ 1,663
North America
Disaggregation of Revenue [Line Items]
Net sales	1,724	1,373
Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	262	290
Ammonia
Disaggregation of Revenue [Line Items]
Net sales	627	520
Ammonia | North America
Disaggregation of Revenue [Line Items]
Net sales	475	366
Ammonia | Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	152	154
Granular Urea
Disaggregation of Revenue [Line Items]
Net sales	590	439
Granular Urea | North America
Disaggregation of Revenue [Line Items]
Net sales	590	439
Granular Urea | Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
UAN
Disaggregation of Revenue [Line Items]
Net sales	583	470
UAN | North America
Disaggregation of Revenue [Line Items]
Net sales	552	408
UAN | Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	31	62
AN
Disaggregation of Revenue [Line Items]
Net sales	58	101
AN | North America
Disaggregation of Revenue [Line Items]
Net sales	1	47
AN | Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	57	54
Other
Disaggregation of Revenue [Line Items]
Net sales	128	133
Other | North America
Disaggregation of Revenue [Line Items]
Net sales	106	113
Other | Europe and Other
Disaggregation of Revenue [Line Items]
Net sales	$ 22	$ 20