The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

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- Definition

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

Number of shares issued under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of shares at initial price for accelerated share repurchases.

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The purchase price of accelerated share repurchases.

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Note 16 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	6 Months Ended
	Jul. 01, 2020	Jan. 15, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Accelerated Share Repurchases, Initial Price, Shares (in shares)				800,275
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		882,749		889,295
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				4 years
Employee Stock Purchase Plan [Member] \| UK Sharesave Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)				0	0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				3 years
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)	4,080
Subsequent Event [Member] \| Employee Stock Purchase Plan [Member] \| UK Sharesave Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	8,174
Subsequent Event [Member] \| Director [Member] \| Deferred Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	7,180
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	3,570
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	12,090
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period (Year)	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	12 months
June 2020 Share Repurchase Program [Member]
Accelerated Share Repurchases, Purchase Price			$ 50
June 2020 Share Repurchase Program [Member] \| Subsequent Event [Member]
Accelerated Share Repurchases, Initial Price, Shares (in shares)	235,018
Accelerated Share Repurchases, Initial Price Paid Per Share (in dollars per share)	$ 170.20
Accelerated Share Repurchases, Settlement (Payment) or Receipt	$ 40