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Revenue Recognition - Capitalized Sales Commissions and Conversion or Implementation Costs (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Sales Commissions
Capitalized Contract Cost [Line Items]
Capitalized contract costs	$ 402	$ 357
Conversion or Implementation Costs
Capitalized Contract Cost [Line Items]
Capitalized contract costs	$ 290	$ 176

X

- Definition

Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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X

- Details

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