Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 9	$ 223	$ 386	$ 448
Other comprehensive (loss) income:
Fair market value adjustment on cash flow hedges, net of income tax benefit (provision) of ($1 million), $36 million, $2 million and $45 million	3	(107)	(5)	(130)
Foreign currency translation	182	(2)	(456)	2
Total other comprehensive (loss) income	190	(108)	(453)	(126)
Comprehensive (loss) income	199	115	(67)	322
Net income (loss) attributable to noncontrolling interests and redeemable noncontrolling interests	7	0	(8)	0
Other comprehensive income attributable to noncontrolling interests	23	0	11	0
Comprehensive (loss) income attributable to Fiserv, Inc.	169	115	(70)	322
Cost of Services
Other comprehensive (loss) income:
Reclassification adjustment for net realized (gains) losses on cash flow hedges	1	0	0	0
Interest Expense
Other comprehensive (loss) income:
Reclassification adjustment for net realized (gains) losses on cash flow hedges	$ 4	$ 1	$ 8	$ 2