Revenue - Estimated future revenue (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($)
Revenue
Total estimated future revenue	$ 1,136,703
Sales of fuel cell systems
Revenue
Total estimated future revenue	55,671
Sale of hydrogen installations and other infrastructure
Revenue
Total estimated future revenue	31,039
Sale of electrolyzers
Revenue
Total estimated future revenue	303,127
Sale of oil and gas equipment
Revenue
Total estimated future revenue	14,559
Services performed on fuel cell systems and related infrastructure
Revenue
Total estimated future revenue	142,111
Power purchase agreements
Revenue
Total estimated future revenue	419,406
Fuel delivered to customers and related equipment
Revenue
Total estimated future revenue	93,685
Sales of cryogenic equipment and other
Revenue
Total estimated future revenue	$ 77,105
Maximum \| Sales of fuel cell systems
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	1 year
Maximum \| Sale of electrolyzers
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	2 years
Maximum \| Services performed on fuel cell systems and related infrastructure
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	10 years
Duration of estimated revenue expected to be recognized in future (in years)	10 years
Maximum \| Power purchase agreements
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	10 years
Minimum \| Sales of fuel cell systems
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	2 years
Duration of estimated revenue expected to be recognized in future (in years)	1 year
Minimum \| Sale of electrolyzers
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	1 year
Minimum \| Services performed on fuel cell systems and related infrastructure
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	5 years
Duration of estimated revenue expected to be recognized in future (in years)	5 years
Minimum \| Power purchase agreements
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	5 years
Minimum \| Fuel delivered to customers and related equipment
Revenue
Duration of estimated revenue expected to be recognized in future (in years)	1 year

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