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Earnings Per Share - Share-based Compensation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total exercised or released (in shares)	29,039	43,050	1,713,078	1,061,645
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	26,664	21,864	683,237	261,703
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	2,375	21,186	738,188	525,226
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	0	0	291,653	274,716

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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.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Number of share options (or share units) exercised during the current period.

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