Financial Royalty Assets - Summary of Financial Royalty Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	$ 17,774,634	$ 17,892,238
Cumulative allowance for changes in expected cash flows	(3,511,707)	(2,927,438)
Net carrying value, before cumulative allowance for credit losses	14,262,927	14,964,800
Cumulative allowance for credit losses	(137,038)	(137,707)
Total current and non-current financial royalty assets, net	14,125,889	14,827,093
Cystic fibrosis franchise
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	5,266,693	5,288,833
Cumulative allowance for changes in expected cash flows	(393,000)	(2,539)
Net carrying value, before cumulative allowance for credit losses	4,873,693	5,286,294
Evrysdi
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	1,803,179	1,793,088
Cumulative allowance for changes in expected cash flows	(24,931)	0
Net carrying value, before cumulative allowance for credit losses	1,778,248	1,793,088
Trelegy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	1,171,848	1,208,807
Cumulative allowance for changes in expected cash flows	0	0
Net carrying value, before cumulative allowance for credit losses	1,171,848	1,208,807
Tysabri
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	1,460,897	1,511,957
Cumulative allowance for changes in expected cash flows	(451,755)	(434,568)
Net carrying value, before cumulative allowance for credit losses	1,009,142	1,077,389
Tremfya
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	927,609	927,488
Cumulative allowance for changes in expected cash flows	(137,217)	(120,733)
Net carrying value, before cumulative allowance for credit losses	790,392	806,755
Xtandi
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	878,728	911,045
Cumulative allowance for changes in expected cash flows	(252,310)	(268,701)
Net carrying value, before cumulative allowance for credit losses	626,418	642,344
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Carrying Value	6,265,680	6,251,020
Cumulative allowance for changes in expected cash flows	(2,252,494)	(2,100,897)
Net carrying value, before cumulative allowance for credit losses	$ 4,013,186	$ 4,150,123