Segment Data (Schedule of Net Sales from External Customers by Products) (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended
		Jul. 01, 2022	Jun. 30, 2023	Jun. 16, 2022	Jun. 30, 2023	Jun. 16, 2022
Segment Reporting Information
Net sales		$ 85.0	$ 475.0	$ 383.7	$ 899.6	$ 874.6
Specialty Brands | Operating Segments
Segment Reporting Information
Net sales		58.2	280.1	247.7	532.1	587.1
Specialty Generics
Segment Reporting Information
Net sales		26.8	194.9	136.0	367.5	287.5
Specialty Generics | Operating Segments
Segment Reporting Information
Net sales		26.8	194.9	136.0	367.5	287.5
Acthar | Specialty Brands
Segment Reporting Information
Net sales		27.5	116.8	94.2	198.8	221.9
Inomax | Specialty Brands
Segment Reporting Information
Net sales		13.5	76.9	66.8	159.6	165.8
Therakos immunotherapy | Specialty Brands
Segment Reporting Information
Net sales		10.2	62.9	49.7	121.6	109.6
Amitiza [Member] | Specialty Brands
Segment Reporting Information
Net sales	[1]	5.8	18.6	33.8	43.1	81.5
Other | Specialty Brands
Segment Reporting Information
Net sales		1.2	1.5	3.2	3.4	8.3
Opioids | Specialty Generics
Segment Reporting Information
Net sales		8.7	72.1	38.8	134.3	88.8
ADHD | Specialty Generics
Segment Reporting Information
Net sales		1.8	19.0	6.8	41.4	17.5
Addiction Treatment | Specialty Generics
Segment Reporting Information
Net sales		2.5	16.1	14.1	31.7	30.0
Other Generics | Specialty Generics
Segment Reporting Information
Net sales		0.1	2.4	2.0	4.2	4.9
Generics | Specialty Generics
Segment Reporting Information
Net sales		13.1	109.6	61.7	211.6	141.2
Controlled substances | Specialty Generics
Segment Reporting Information
Net sales		1.7	20.9	17.2	39.4	37.6
APAP | Specialty Generics
Segment Reporting Information
Net sales		11.3	59.8	50.2	106.2	96.5
Other API | Specialty Generics
Segment Reporting Information
Net sales		0.7	4.6	6.9	10.3	12.2
API | Specialty Generics
Segment Reporting Information
Net sales		13.7	85.3	74.3	155.9	146.3
Terlivaz | Specialty Brands
Segment Reporting Information
Net sales		$ 0.0	$ 3.4	$ 0.0	$ 5.6	$ 0.0

[1] Amitiza consists of both product net sales and royalties. Refer to Note 2 for further details on Amitiza's revenues.