Shareholders' Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Shareholders' Equity

Shareholders' Equity

(a) Dividends paid and proposed

In millions	2019		2018
Dividends declared and paid during the year:
Interim dividend paid February 7, 2018 ($0.125 per ordinary share)	$	—	$	3.4
Interim dividend paid February 6, 2019 ($0.125 per ordinary share)	3.4		—
	$	3.4	$	3.4

In millions	2019		2018
Dividends declared before and paid after April 1, (recognized as a liability at April 1):
Interim dividend declared March 27, and paid May 2, 2018: ($0.125 per ordinary share)	$	—	$	3.3
	$	—	$	3.3
Dividends declared and paid after March 31 (not recognized as a liability at March 31):
Interim dividend declared April 1, and paid May 1, 2019: ($0.125 per ordinary share)	$	3.4	$	—
	$	3.4	$	—