Gain on Sale of Rights	12 Months Ended
Dec. 31, 2013
Gain on Sale of Rights [Abstract]
Gain on Sale of Rights	Gain on Sale of Rights During the third quarter of 2012, we sold all of our rights, including rights to royalties, related to BENLYSTA (belimumab) to a DRI Capital managed fund (DRI). We were entitled to these rights pursuant to a license agreement with Human Genome Sciences, Inc. and GlaxoSmithKline plc (collectively the "Licensees"). Under the terms of the BENLYSTA sale agreement, we will receive payments from DRI equal to a multiple of royalties payable by the Licensees for the period covering October 2011 to September 2014 and a one-time contingency payment that could be paid to us if the cumulative royalties over the full royalty term exceed an agreed amount. DRI will retain all the royalty payments from sales of BENLYSTA after September 2014. We have accounted for this as the sale of a long-lived asset with zero cost basis as we have transferred all of our substantive rights related to this asset. Under the terms of this noncancelable sale, DRI will have no recourse to us for the Licensees' performance with respect to sales of BENLYSTA, even in the event of Licensees' insolvency, nonperformance or inability to comply with terms of the license agreement. We do not have any continuing involvement with DRI or the Licensees with respect to sales of BENLYSTA, and have concluded that the sale of the rights represents the culmination of an earnings process. The payments received during 2013 and 2012 totaled $24.9 million and $46.8 million, respectively. These payments were recorded as a gain on sale of rights within our consolidated statements of income. The remaining payments, which are contingent upon BENLYSTA sales over the period ending September 2014, will be recognized as the payments become due as we cannot reliably estimate the amount and timing of contingent payments.

Gain on Sale of Rights

During the third quarter of 2012, we sold all of our rights, including rights to royalties, related to BENLYSTA (belimumab) to a DRI Capital managed fund (DRI). We were entitled to these rights pursuant to a license agreement with Human Genome Sciences, Inc. and GlaxoSmithKline plc (collectively the "Licensees"). Under the terms of the BENLYSTA sale agreement, we will receive payments from DRI equal to a multiple of royalties payable by the Licensees for the period covering October 2011 to September 2014 and a one-time contingency payment that could be paid to us if the cumulative royalties over the full royalty term exceed an agreed amount. DRI will retain all the royalty payments from sales of BENLYSTA after September 2014. We have accounted for this as the sale of a long-lived asset with zero cost basis as we have transferred all of our substantive rights related to this asset.

Under the terms of this noncancelable sale, DRI will have no recourse to us for the Licensees' performance with respect to sales of BENLYSTA, even in the event of Licensees' insolvency, nonperformance or inability to comply with terms of the license agreement. We do not have any continuing involvement with DRI or the Licensees with respect to sales of BENLYSTA, and have concluded that the sale of the rights represents the culmination of an earnings process.

The payments received during 2013 and 2012 totaled $24.9 million and $46.8 million, respectively. These payments were recorded as a gain on sale of rights within our consolidated statements of income. The remaining payments, which are contingent upon BENLYSTA sales over the period ending September 2014, will be recognized as the payments become due as we cannot reliably estimate the amount and timing of contingent payments.