Consolidated Statements of Comprehensive Earnings (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Income taxes on currency translation adjustments in earnings	$ (101)	$ (143)	$ (161)
Foreign currency reclassification adjustment, tax effect	0	0	0
Income taxes on net losses and prior service costs	78	17	167
Income taxes on amortization of net losses, prior service costs and net transition costs	(43)	(48)	(42)
Income taxes on loss/(gain) recognized from fair value of derivatives accounted for as hedges	(4)	(5)	(13)
Income taxes on loss/(gain) transferred to earnings from fair value of derivatives accounted for as hedges	$ (3)	$ 14	$ 10