Goodwill And Other Acquired Intangible Assets - Acquired Intangible Assets and Related Amortization (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, net	$ 1,824	$ 1,498
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	1,623	1,325
Accumulated amortization	(313)	(235)
Acquired intangible assets, net	1,310	1,090
Trade secrets
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	30	30
Accumulated amortization	(29)	(29)
Acquired intangible assets, net	1	1
Software/product technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	417	372
Accumulated amortization	(166)	(131)
Acquired intangible assets, net	251	241
Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	161	150
Accumulated amortization	(38)	(30)
Acquired intangible assets, net	123	120
Other
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	192	80
Accumulated amortization	(53)	(34)
Acquired intangible assets, net	$ 139	$ 46