Shareholders' Equity - Schedule of weighted average shares outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Basic weighted average ordinary shares outstanding (in shares)	231,900,000	238,600,000	245,200,000
Dilutive effect of potentially issuable shares (in shares)	1,200,000	2,000,000.0	1,800,000
Diluted weighted average ordinary shares outstanding (in shares)	233,100,000	240,600,000	247,000,000.0
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0