Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Amortized intangible assets:
Other intangible assets, gross	$ 1,168	$ 1,121
Other intangible assets, accumulated amortization	343	325
Other intangible assets, net	825	796
Patents, Trademarks, and Trade Names [Member]
Amortized intangible assets:
Other intangible assets, gross	363	360
Other intangible assets, accumulated amortization	180	176
Other intangible assets, net	183	184
Customer Lists and Other [Member]
Amortized intangible assets:
Other intangible assets, gross	805	761
Other intangible assets, accumulated amortization	163	149
Other intangible assets, net	$ 642	$ 612