Earnings per Ordinary Share (Narrative) (Details) - $ / shares shares in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Diluted (in USD per share)	$ 0.37	$ 0.34	$ (0.01)	$ 0.58
Anti-dilutive stock options or restricted stock awards excluded from computation of earnings per share	10.0	9.3	9.9	8.9

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details