Goodwill and Other Intangible Assets, net (Goodwill and Other Intangible Assets, by Segment) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Goodwill and Other Intangible Assets, net [Line Items]
Goodwill	$ 7,681	$ 7,324
Other Intangible Assets, net	2,501	2,470
European Union [Member]
Goodwill and Other Intangible Assets, net [Line Items]
Goodwill	1,397	1,238
Other Intangible Assets, net	471	479
Eastern Europe, Middle East & Africa [Member]
Goodwill and Other Intangible Assets, net [Line Items]
Goodwill	408	372
Other Intangible Assets, net	195	200
Asia [Member]
Goodwill and Other Intangible Assets, net [Line Items]
Goodwill	3,578	3,596
Other Intangible Assets, net	1,055	1,074
Latin America & Canada [Member]
Goodwill and Other Intangible Assets, net [Line Items]
Goodwill	2,298	2,118
Other Intangible Assets, net	$ 780	$ 717