v3.26.1
Segment Information - Geographic Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues from external customers by geographic area        
Total revenues $ 783.3 $ 798.6 $ 1,564.8 $ 1,593.0
Total Tyvaso        
Revenues from external customers by geographic area        
Total revenues 452.6 469.6 910.1 935.9
Tyvaso DPI        
Revenues from external customers by geographic area        
Total revenues 326.6 315.2 656.9 617.7
Nebulized Tyvaso        
Revenues from external customers by geographic area        
Total revenues 126.0 154.4 253.2 318.2
Remodulin        
Revenues from external customers by geographic area        
Total revenues 126.3 134.7 252.9 272.9
Orenitram        
Revenues from external customers by geographic area        
Total revenues 125.7 123.9 261.3 244.6
Unituxin        
Revenues from external customers by geographic area        
Total revenues 65.2 58.4 118.8 116.6
Adcirca        
Revenues from external customers by geographic area        
Total revenues 6.7 6.5 9.6 12.5
Other        
Revenues from external customers by geographic area        
Total revenues 6.8 5.5 12.1 10.5
U.S.        
Revenues from external customers by geographic area        
Total revenues 733.6 759.8 1,477.8 1,509.4
U.S. | Total Tyvaso        
Revenues from external customers by geographic area        
Total revenues 436.3 455.3 879.2 896.4
U.S. | Tyvaso DPI        
Revenues from external customers by geographic area        
Total revenues 326.6 314.8 656.9 617.3
U.S. | Nebulized Tyvaso        
Revenues from external customers by geographic area        
Total revenues 109.7 140.5 222.3 279.1
U.S. | Remodulin        
Revenues from external customers by geographic area        
Total revenues 99.4 113.7 208.2 233.9
U.S. | Orenitram        
Revenues from external customers by geographic area        
Total revenues 125.7 123.9 261.3 244.6
U.S. | Unituxin        
Revenues from external customers by geographic area        
Total revenues 59.0 55.4 108.0 112.3
U.S. | Adcirca        
Revenues from external customers by geographic area        
Total revenues 6.7 6.5 9.6 12.5
U.S. | Other        
Revenues from external customers by geographic area        
Total revenues 6.5 5.0 11.5 9.7
ROW        
Revenues from external customers by geographic area        
Total revenues 49.7 38.8 87.0 83.6
ROW | Total Tyvaso        
Revenues from external customers by geographic area        
Total revenues 16.3 14.3 30.9 39.5
ROW | Tyvaso DPI        
Revenues from external customers by geographic area        
Total revenues 0.0 0.4 0.0 0.4
ROW | Nebulized Tyvaso        
Revenues from external customers by geographic area        
Total revenues 16.3 13.9 30.9 39.1
ROW | Remodulin        
Revenues from external customers by geographic area        
Total revenues 26.9 21.0 44.7 39.0
ROW | Orenitram        
Revenues from external customers by geographic area        
Total revenues 0.0 0.0 0.0 0.0
ROW | Unituxin        
Revenues from external customers by geographic area        
Total revenues 6.2 3.0 10.8 4.3
ROW | Adcirca        
Revenues from external customers by geographic area        
Total revenues 0.0 0.0 0.0 0.0
ROW | Other        
Revenues from external customers by geographic area        
Total revenues $ 0.3 $ 0.5 $ 0.6 $ 0.8