Amount classified as inventory attributable to disposal group held for sale or disposed of.

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Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationInventory1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Inventory - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Inventory - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2019
Inventory [Line Items]
Write-downs on excess, obsolete, unmarketable or other inventory	$ 26.6	$ 52.2	$ 41.9
Inventory raw materials sold to FUJIFILM				$ 41.8
Work-in-process
Inventory [Line Items]
Inventory work-in-process sold to FUJIFILM				$ 14.0