Goodwill and Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Acquired intangible assets disclosures
Total gross carrying amount	$ 3,762	$ 3,751
Total accumulated amortization	(1,851)	(1,785)
Total finite-lived intangible assets - net	1,911	1,966
Non-amortizable intangible assets (primarily tradenames)	640	635
Total intangible assets - net	$ 2,551	2,601
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	$ 1,985	1,973
Total accumulated amortization	(706)	(668)
Patents
Acquired intangible assets disclosures
Total gross carrying amount	610	616
Total accumulated amortization	(484)	(481)
Other technology-based intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	526	525
Total accumulated amortization	(267)	(252)
Definite-lived tradenames
Acquired intangible assets disclosures
Total gross carrying amount	423	421
Total accumulated amortization	(222)	(215)
Other amortizable intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	218	216
Total accumulated amortization	$ (172)	$ (169)