Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2018	[1],[2]	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	[3],[4],[5],[6]	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Basic:
Net income attributable to ARRIS International plc	$ 44,507		$ 47,079	$ 35,754	$ (13,600)	$ 12,469		$ 88,320	$ 30,336	$ (39,098)	$ 113,740		$ 92,027		$ 18,100
Weighted average shares outstanding (in shares)											180,147		187,133		190,701
Basic earnings per share (in dollars per share)	$ 0.26		$ 0.26	$ 0.19	$ (0.07)	$ 0.07		$ 0.47	$ 0.16	$ (0.21)	$ 0.63	[7]	$ 0.49	[7]	$ 0.09	[7]
Diluted:
Net income attributable to ARRIS International plc	$ 44,507		$ 47,079	$ 35,754	$ (13,600)	$ 12,469		$ 88,320	$ 30,336	$ (39,098)	$ 113,740		$ 92,027		$ 18,100
Weighted average shares outstanding (in shares)											180,147		187,133		190,701
Net effect of dilutive equity awards											1,894		2,483		1,484
Total											182,041		189,616		192,185
Diluted earnings per share (in dollars per share)	$ 0.25		$ 0.26	$ 0.19	$ (0.07)	$ 0.07		$ 0.47	$ 0.16	$ (0.21)	$ 0.62	[7]	$ 0.49	[7]	$ 0.09	[7]

[1] For the quarter ended December 31, 2018, the Company recorded a gain on the sale of its Taiwan factory and certain equipment of $13.3 million.

[2] In the fourth quarter, the Company recorded losses of $5.7 million associated with the settlement and partial curtailment of its U.S. and Taiwan pension plans.

[3] During 2017, the Company recorded a foreign currency remeasurement loss of $10.5 million related primarily to a deferred income tax liability, in the United Kingdom. This deferred income tax liability is denominated in GBP. The foreign currency remeasurement gain derives from the remeasurement of the GBP deferred income tax liability to the USD, since the date of the acquisition.

[4] For the quarter ended December 31, 2017, the Company recorded an increase to net sales of $8.1 million, to reverse previous quarters reduction in net sales in connection with Warrants.

[5] In the fourth quarter of 2017, the Company recorded acquisition costs of $61.5 million related to the cash settlement of stock-based awards held by transferring employees.

[6] In the fourth quarter of 2017, the Company recorded partial impairments of goodwill and indefinite-lived tradenames of $51.2 million and $3.8 million, respectively, acquired in our ActiveVideo acquisition and included as part of our Cloud TV reporting unit, of which $19.3 million is attributable to noncontrolling interest.

[7] Calculated based on net income attributable to shareowners of ARRIS International plc.