Royalties And Licenses (Narrative) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Royalties And Licenses
Unrecorded Unconditional Purchase Obligation (Royalties and Licenses)	$ 2,897
Developer Commitments
Royalties And Licenses
Unrecorded Unconditional Purchase Obligation (Royalties and Licenses)	$ 1,839

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant