Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 1,795	$ 1,636	$ 1,497
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(742)	(639)	(527)
Unrealized investment income	21	1	0
Gain (loss) related to pension/post-retirement plans	(119)	337	(1,085)
Other comprehensive loss, before tax	(840)	(301)	(1,612)
Income tax (credit) expense on other comprehensive (loss) income	33	72	(386)
Other comprehensive loss, net of tax	(873)	(373)	(1,226)
Comprehensive income	922	1,263	271
Less: Comprehensive income attributable to non-controlling interests	27	37	32
Comprehensive income attributable to the Company	$ 895	$ 1,226	$ 239