Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net income	$ 695	$ 609	$ 1,271	$ 1,291
Other comprehensive income (loss):
Fair market value adjustment on derivatives	4	(8)	9	(9)
Tax impacts of derivatives	(1)	1	(4)	0
Unrealized gain (loss) on defined benefit pension plans	0	(3)	3	(4)
Tax impacts of defined benefit pension plans	0	1	(1)	1
Foreign currency translation	135	(324)	250	(215)
Tax impacts of foreign currency translation	18	(61)	40	(83)
Total other comprehensive income (loss)	157	(389)	304	(301)
Comprehensive income	852	220	1,575	990
Less: net income attributable to noncontrolling interests and redeemable noncontrolling interests	12	11	25	24
Less: other comprehensive income (loss) attributable to noncontrolling interests	3	(24)	15	(41)
Comprehensive income attributable to Fiserv, Inc.	837	233	1,535	1,007
Cost of Services
Other comprehensive income (loss):
Reclassification adjustment for net realized (gains) losses on cash flow hedges	(1)	0	0	(1)
Interest Expense
Other comprehensive income (loss):
Reclassification adjustment for net realized (gains) losses on cash flow hedges	$ 2	$ 5	$ 7	$ 10