Receivables - Schedule of Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Receivables [Abstract]
Trade receivables - U.S. government	$ 93.8		$ 110.4
Trade receivables - other	1,361.0		1,091.3
Other receivables	94.0		85.9
Total receivables, gross	1,548.8		1,287.6
Less allowance for doubtful accounts	(5.8)	$ (5.8)	(5.7)	$ (9.9)	$ (7.2)	$ (7.4)
Total receivables, net	$ 1,543.0		$ 1,281.9