Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 696	$ 578
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	228	235
Unrealized investment gains (losses)	0	(5)
(Loss) gain related to pension/post-retirement plans	(84)	33
Other comprehensive income, before tax	144	263
Income tax (credit) expense on other comprehensive income	(8)	7
Other comprehensive income, net of tax	152	256
Comprehensive income	848	834
Less: comprehensive income attributable to non-controlling interest	6	9
Comprehensive income attributable to the Company	$ 842	$ 825