Goodwill and Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Acquired intangible assets disclosures
Total gross carrying amount	$ 4,583	$ 4,198
Total accumulated amortization	(2,371)	(2,182)
Total finite-lived intangible assets - net	2,212	2,016
Non-amortizable intangible assets (primarily tradenames)	635	641
Total intangible assets - net	$ 2,847	2,657
Minimum
Acquired intangible assets disclosures
Indefinite lived tradenames years in existence	55 years
Customer related intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	$ 2,525	2,291
Total accumulated amortization	(1,107)	(998)
Patents
Acquired intangible assets disclosures
Total gross carrying amount	536	542
Total accumulated amortization	(493)	(487)
Other technology-based intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	727	576
Total accumulated amortization	(382)	(333)
Definite-lived tradenames
Acquired intangible assets disclosures
Total gross carrying amount	673	664
Total accumulated amortization	(300)	(276)
Other amortizable intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	122	125
Total accumulated amortization	$ (89)	$ (88)