XML
106
R111.htm
IDEA: XBRL DOCUMENT
v3.19.3
Net Revenues - Additional Information (Detail)
9 Months Ended
Sep. 30, 2019
Revenues [Abstract]
Billing cycle period
30 days
X
- Definition
Billing cycle period.
+ References
No definition available.
+ Details
Name:
g_BillingCyclePeriod
Namespace Prefix:
g_
Data Type:
xbrli:durationItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_RevenuesAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration