Reconciliation of Equity (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Shareholders Equity [Line Items]
Balance	$ 3,226,737
Net loss	(12,557)
Other comprehensive income, net of tax	(1,108)
Contribution from non-controlling interest	3,500
Compensation under stock award plans	41,740
Issuance of ordinary shares and other	(5,329)
Provision for warrants	5,081
Repurchase of ordinary shares, net	(126,965)
Cumulative effect adjustment to opening balance	10,974	[1]
Balance	3,142,073
Ordinary Shares
Shareholders Equity [Line Items]
Balance	2,831
Issuance of ordinary shares and other	16
Repurchase of ordinary shares, net	(61)
Balance	2,786
Capital in Excess of Par Value
Shareholders Equity [Line Items]
Balance	3,314,707
Compensation under stock award plans	41,740
Issuance of ordinary shares and other	(5,345)
Provision for warrants	5,081
Balance	3,356,183
Accumulated Deficit
Shareholders Equity [Line Items]
Balance	(132,013)
Net loss	(8,762)
Repurchase of ordinary shares, net	(126,904)
Cumulative effect adjustment to opening balance	10,974	[1]
Balance	(256,705)
Accumulated Other Comprehensive Income (Loss)
Shareholders Equity [Line Items]
Balance	3,291
Other comprehensive income, net of tax	(1,080)
Balance	2,211
Total ARRIS International plc stockholders' equity
Shareholders Equity [Line Items]
Balance	3,188,816
Net loss	(8,762)
Other comprehensive income, net of tax	(1,080)
Compensation under stock award plans	41,740
Issuance of ordinary shares and other	(5,329)
Provision for warrants	5,081
Repurchase of ordinary shares, net	(126,965)
Cumulative effect adjustment to opening balance	10,974	[1]
Balance	3,104,475
Non-controlling Interest
Shareholders Equity [Line Items]
Balance	37,921
Net loss	(3,795)
Other comprehensive income, net of tax	(28)
Contribution from non-controlling interest	3,500
Balance	$ 37,598

[1] Cumulative adjustment related to the adoption of accounting standards, see Note 2 Impact of Recently Adopted Accounting Standards for additional information.