Intangible Assets (Details) (USD $)	3 Months Ended			3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 GSK	Mar. 31, 2013 GSK	Dec. 31, 2013 GSK	Mar. 31, 2014 GSK BREO ELLIPTA	Dec. 31, 2013 GSK BREO ELLIPTA	Mar. 31, 2014 GSK RELVAR ELLIPTA Japan	Dec. 31, 2013 GSK RELVAR ELLIPTA Japan	Mar. 31, 2014 GSK RELVAR ELLIPTA Europe	Dec. 31, 2013 GSK RELVAR ELLIPTA Europe	Mar. 31, 2014 GSK ANORO ELLIPTA	Dec. 31, 2013 GSK ANORO ELLIPTA
Intangible assets
Weighted Average Remaining Amortization Period							15 years 4 months 24 days	15 years 8 months 12 days	14 years 8 months 12 days	14 years 10 months 24 days	14 years 9 months 18 days	15 years	15 years 2 months 12 days	15 years 2 months 12 days
Gross Carrying Value				$ 140,000,000		$ 125,000,000	$ 60,000,000	$ 60,000,000	$ 20,000,000	$ 20,000,000	$ 30,000,000	$ 15,000,000	$ 30,000,000	$ 30,000,000
Accumulated Amortization				(2,523,000)		(743,000)	(1,579,000)	(632,000)	(444,000)	(111,000)	(500,000)	0	0	0
Net Carrying Value	137,477,000		124,257,000	137,477,000		124,257,000	58,421,000	59,368,000	19,556,000	19,889,000	29,500,000	15,000,000	30,000,000	30,000,000
Amortization expense	1,780,000	0		1,780,000	0
Estimated amortization expense for the year 2014	8,100,000
Estimated amortization expense for the year 2015	9,100,000
Estimated amortization expense for the year 2016	9,100,000
Estimated amortization expense for the year 2017	9,100,000
Estimated amortization expense for the year 2018	9,100,000
Estimated amortization expense after the year 2018	$ 94,700,000