v3.26.1
Segment Information - General (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Segment Reporting [Abstract]        
Number of operating segments | segment     1  
Net product sales, cost of product sales and gross profit by product        
Total revenues $ 783.3 $ 798.6 $ 1,564.8 $ 1,593.0
Cost of sales 99.5 87.6 232.9 180.1
Gross profit (loss) 683.8 711.0 1,331.9 1,412.9
Inventory reserve 19.2 6.5 64.1 15.5
Tyvaso DPI        
Net product sales, cost of product sales and gross profit by product        
Total revenues 326.6 315.2 656.9 617.7
Cost of sales 51.1 48.5 134.3 96.6
Gross profit (loss) 275.5 266.7 522.6 521.1
Inventory reserve 7.9 5.1 47.1 10.8
Loss related to commercial supply agreement 7.5   34.3  
Nebulized Tyvaso        
Net product sales, cost of product sales and gross profit by product        
Total revenues 126.0 154.4 253.2 318.2
Cost of sales 8.9 5.6 17.5 14.1
Gross profit (loss) 117.1 148.8 235.7 304.1
Remodulin        
Net product sales, cost of product sales and gross profit by product        
Total revenues 126.3 134.7 252.9 272.9
Cost of sales 17.4 14.3 33.5 28.1
Gross profit (loss) 108.9 120.4 219.4 244.8
Orenitram        
Net product sales, cost of product sales and gross profit by product        
Total revenues 125.7 123.9 261.3 244.6
Cost of sales 6.1 6.7 13.5 15.0
Gross profit (loss) 119.6 117.2 247.8 229.6
Unituxin        
Net product sales, cost of product sales and gross profit by product        
Total revenues 65.2 58.4 118.8 116.6
Cost of sales 2.0 2.8 7.0 8.0
Gross profit (loss) 63.2 55.6 111.8 108.6
Adcirca        
Net product sales, cost of product sales and gross profit by product        
Total revenues 6.7 6.5 9.6 12.5
Cost of sales 3.0 2.7 4.0 5.3
Gross profit (loss) 3.7 3.8 5.6 7.2
Other        
Net product sales, cost of product sales and gross profit by product        
Total revenues 6.8 5.5 12.1 10.5
Cost of sales 11.0 7.0 23.1 13.0
Gross profit (loss) $ (4.2) $ (1.5) $ (11.0) $ (2.5)