Aggregate dividends paid during the period for each share of common stock outstanding.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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

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Shareholders' Equity - Narrative (Details) - $ / shares	3 Months Ended						9 Months Ended
Shareholders' Equity - Narrative (Details) - $ / shares	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid on common stock per share (in dollars per share)	$ 1.13000	$ 1.13000	$ 1.13	$ 0.86000	$ 0.86000	$ 0.86
Stock options exercised (in shares)							725,147
Weighted average price (in dollars per share)	$ 153.29						$ 153.29
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vested (in shares)							156,983