Agreements with SK hynix and Micron (Tables)

6 Months Ended

Jun. 30, 2016

SK hynix [Member]

Revenue Recognition, Multiple-deliverable Arrangements [Line Items]

Revenue Recognition, Multiple-deliverable Arrangements [Table Text Block]

The cumulative cash receipts through June 30, 2016 and the remaining future cash receipts from the agreements with SK hynix are expected to be recognized as follows assuming no adjustments to the payments under the terms of the agreements (and assuming the option to make the lower payments begins with payments made during the middle of 2018):

	Cumulative Received to-date as of June 30,		Estimated to Be Received in												Total Estimated Cash Receipts
	2016		Remainder of 2016		2017		2018		2019		2020		2021 and Thereafter
(in millions)
Royalty revenue	$	158.1	$	32.0	$	48.0	$	40.0	$	32.0	$	48.0	$	168.0	$	526.1
Gain from settlement	1.9		—		—		—		—		—		—		1.9
Total	$	160.0	$	32.0	$	48.0	$	40.0	$	32.0	$	48.0	$	168.0	$	528.0

Micron [Member]

Revenue Recognition, Multiple-deliverable Arrangements [Line Items]

Revenue Recognition, Multiple-deliverable Arrangements [Table Text Block]

The cumulative cash receipts through June 30, 2016 and the remaining future cash receipts from the agreements with Micron are expected to be recognized as follows assuming no adjustments to the payments under the terms of the agreements:

	Cumulative Received to-date as of June 30,		Estimated to Be Received in										Total Estimated Cash Receipts
	2016		Remainder of 2016		2017		2018		2019		2020
(in millions)
Royalty revenue	$	102.2	$	20.0	$	40.0	$	40.0	$	40.0	$	34.5	$	276.7
Gain from settlement	3.3		—		—		—		—		—		3.3
Total	$	105.5	$	20.0	$	40.0	$	40.0	$	40.0	$	34.5	$	280.0