Information about Geographic Areas and Products - Subscription Revenues (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Subscription revenues	$ 1,409	$ 1,071	$ 2,769	$ 2,117
Digital workflow products
Segment Reporting Information [Line Items]
Subscription revenues	1,164	886	2,295	1,754
ITOM products
Segment Reporting Information [Line Items]
Subscription revenues	166	129	328	256
Total subscription revenues
Segment Reporting Information [Line Items]
Subscription revenues	$ 1,330	$ 1,015	$ 2,623	$ 2,010