Goodwill and Other Intangible Assets - Schedule of Intangible Assets by Type (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	$ 4,909		$ 5,994
Finite-lived intangible assets, accumulated amortization	(2,574)		(2,855)
Finite-lived intangible assets, net	2,335		3,139
Indefinite-lived intangible assets	2,241		2,242
Intangible assets, gross	7,150		8,236
Other intangible assets, net	4,576		5,381
Intangible assets impairment	725	$ 0
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	2,317		3,027
Finite-lived intangible assets, accumulated amortization	(853)		(1,045)
Finite-lived intangible assets, net	1,464		1,982
Intangible assets impairment	476
Technology
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	1,030		1,075
Finite-lived intangible assets, accumulated amortization	(605)		(626)
Finite-lived intangible assets, net	425		449
Intangible assets impairment	8
Trade names and trademarks
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	380		696
Finite-lived intangible assets, accumulated amortization	(184)		(254)
Finite-lived intangible assets, net	196		442
Intangible assets impairment	236
Capitalized software
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	1,181		1,193
Finite-lived intangible assets, accumulated amortization	(931)		(928)
Finite-lived intangible assets, net	250		265
Intangible assets impairment	3
Other
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	1		3
Finite-lived intangible assets, accumulated amortization	(1)		(2)
Finite-lived intangible assets, net	$ 0		$ 1