Consolidated Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Profit (loss) of consolidated and affiliated companies	$ 759	$ (59)	$ 2,523
Other comprehensive income (loss), Net of Tax:
Foreign currency translation, net of tax (provision)/benefit of: 2017 - $96; 2016 - $(30); 2015 - $(82)	765	(17)	(973)
Pension and other postretirement benefits:
Current year prior service credit (cost), net of tax (provision)/benefit of: 2017 - $(26); 2016 - $(69); 2015 - $5	48	118	(3)
Amortization of prior service (credit) cost, net of tax (provision)/benefit of: 2017 - $9; 2016 - $21; 2015 - $18	(16)	(35)	(35)
Derivative financial instruments:
Gains (losses) deferred, net of tax (provision)/benefit of: 2017 - $2; 2016 - $33; 2015 - $11	(3)	(62)	(19)
(Gains) losses reclassified to earnings, net of tax (provision)/benefit of: 2017 - $(44); 2016 - $2; 2015 - $(51)	77	(3)	88
Available-for-sale securities:
Gains (losses) deferred, net of tax (provision)/benefit of: 2017 - $(23); 2016 - $(12); 2015 - $9	41	26	(10)
(Gains) losses reclassified to earnings, net of tax (provision)/benefit of: 2017 - $35; 2016 - $15 2015 - $20	(65)	(31)	(36)
Total other comprehensive income (loss), net of tax	847	(4)	(988)
Comprehensive income	1,606	(63)	1,535
Less: comprehensive income attributable to the noncontrolling interests	(5)	(8)	1
Comprehensive income attributable to shareholders	$ 1,601	$ (71)	$ 1,536