Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 1,670	$ 1,512	$ 1,795
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(529)	717	(742)
Unrealized investment (loss) income	0	(7)	21
(Loss) gain related to pension/post-retirement plans	(91)	408	(119)
Other comprehensive (loss) income, before tax	(620)	1,118	(840)
Income tax (credit) expense on other comprehensive (loss) income	(30)	68	33
Other comprehensive (loss) income, net of tax	(590)	1,050	(873)
Comprehensive income	1,080	2,562	922
Less: Comprehensive income attributable to non-controlling interests	20	20	27
Comprehensive income attributable to the Company	$ 1,060	$ 2,542	$ 895

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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