Goodwill (Schedule of Goodwill by Segment) (Details) $ in Millions	3 Months Ended
	Dec. 31, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, net, beginning balance	$ 963.9
Currency translation	7.6
Goodwill, net, ending balance	971.5
Americas
Goodwill [Roll Forward]
Goodwill, net, beginning balance	143.5
Currency translation	2.7
Goodwill, net, ending balance	146.2
Asia
Goodwill [Roll Forward]
Goodwill, net, beginning balance	172.5
Currency translation	(0.2)
Goodwill, net, ending balance	172.3
Europe
Goodwill [Roll Forward]
Goodwill, net, beginning balance	597.9
Currency translation	5.1
Goodwill, net, ending balance	603.0
Middle East and India
Goodwill [Roll Forward]
Goodwill, net, beginning balance	15.8
Currency translation	0.0
Goodwill, net, ending balance	15.8
Corporate and other
Goodwill [Roll Forward]
Goodwill, net, beginning balance	34.2
Currency translation	0.0
Goodwill, net, ending balance	$ 34.2