Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Sep. 30, 2023	Aug. 12, 2023	Aug. 11, 2023	Dec. 31, 2022
Assets
Right-of-use operating lease assets	$ 98.0	$ 102.2
Finance	7.7	$ 8.7
Total leased assets	105.7
Current liabilities
Operating lease liabilities	40.1
Finance	3.9
Noncurrent liabilities
Operating	65.5
Finance	4.2
Total lease liabilities	$ 113.7
Predecessor
Assets
Right-of-use operating lease assets			$ 89.6	$ 108.5
Finance			$ 7.9	10.3
Total leased assets				118.8
Current liabilities
Operating lease liabilities				39.0
Finance				4.1
Noncurrent liabilities
Operating				76.7
Finance				5.7
Total lease liabilities				$ 125.5