Theravance Respiratory Company, LLC - Summary - Summary financial information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary financial information
Current assets	$ 393,341				$ 338,488				$ 393,341	$ 338,488
Current liabilities	123,571				111,703				123,571	111,703
Revenues	18,730	$ 18,257	$ 15,008	$ 19,862	29,499	$ 12,427	$ 26,150	$ 5,338	71,857	73,414	$ 60,370
Income from continuing operations and net income for the year ended	(58,434)	$ (73,643)	$ (62,887)	$ (83,053)	(65,606)	$ (58,431)	$ (39,838)	$ (72,580)	(278,017)	(236,455)	(215,524)
TRC
Summary financial information
Current assets	63,027				36,737				63,027	36,737
Non-current assets	16,959								16,959
Current liabilities	$ 508				$ 3,069				508	3,069
Income from continuing operations and net income for the year ended									81,662	39,653	13,261
TRC | Royalties
Summary financial information
Revenues									73,089	$ 42,790	$ 13,379
TRC | Collaborative Arrangement, Transaction with Party to Collaborative Arrangements
Summary financial information
Revenues									$ 10,000