The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Name:	us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Summary of Significant Accounting Policies, Depreciable Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Depreciable Assets
Impairments	$ 0.0	$ 0.0	$ 0.0
Machinery and Equipment, and Office Equipment [Member] \| Minimum
Depreciable Assets
Estimated useful life	3 years
Machinery and Equipment, and Office Equipment [Member] \| Maximum
Depreciable Assets
Estimated useful life	12 years
Buildings [Member] \| Minimum
Depreciable Assets
Estimated useful life	20 years
Buildings [Member] \| Maximum
Depreciable Assets
Estimated useful life	40 years