Share-Based Compensation - Schedule of Assumptions Used to Determine Fair Value of Stock Options Assumed in Acquisition (Details)		9 Months Ended
Jul. 29, 2019	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)		6 years 4 months 24 days	6 years 3 months 18 days
Average risk-free interest rate		2.70%	2.20%
Expected volatility (as a percent)		28.50%	28.30%
Expected dividend yield (as a percent)		0.00%	0.00%
First Data
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	2 years 6 months
Average risk-free interest rate	1.90%
Expected volatility (as a percent)	27.40%
Expected dividend yield (as a percent)	0.00%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

+ Details

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

+ References

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- 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.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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