Note 4 - Licences, Royalty Collaborative and Contractual Arrangements (Details) - Components of Revenues from Royalties, Collaborative and Contractual Agreements (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Royalty revenue	$ 8.1	$ 7.7	$ 14.1	$ 9.6
Revenue from services	21.4	4.8	46.1	14.5
Milestones and other revenue		2.8	0.1	3.0
Total revenue	29.5	12.5	60.3	24.3
Relenza [Member]
Segment Reporting Information [Line Items]
Royalty revenue	4.2	1.7	9.7	2.7
Inavir [Member]
Segment Reporting Information [Line Items]
Royalty revenue	$ 3.9	$ 3.2	$ 4.4	$ 4.1