Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic:
Net income attributable to ARRIS International plc		$ 47,079	$ 88,320	$ 69,233	$ 79,558
Weighted average shares outstanding (in shares)		178,106	187,064	182,132	187,878
Basic earnings per share (in dollars per share)	[1]	$ 0.26	$ 0.47	$ 0.38	$ 0.42
Diluted:
Net income attributable to ARRIS International plc		$ 47,079	$ 88,320	$ 69,233	$ 79,558
Weighted average shares outstanding (in shares)		178,106	187,064	182,132	187,878
Net effect of dilutive equity awards		1,231	1,877	1,685	2,386
Total		179,337	188,941	183,817	190,264
Diluted earnings per share (in dollars per share)	[1]	$ 0.26	$ 0.47	$ 0.38	$ 0.42

[1] Calculated based on net income attributable to stockholders of ARRIS International plc