Retirement-Related Benefits (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Contribution Plan Disclosure
Total defined benefit and contribution plans cost recognized in the Consolidated Statement of Earnings, U.S. Plans	$ 96	$ (25)	$ 304	$ (60)
Total defined benefit and contribution plans cost recognized in the Consolidated Statement of Earnings, Non-U.S. Plans	409	433	1,443	1,340
Total defined benefit and contribution plans cost recognized in the Consolidated Statement of Earnings	505	408	1,747	1,280
U.S. Defined Contribution Pension Plans
Defined Contribution Plan Disclosure
Cost of defined contribution plans	162	179	500	554
Non-US Defined Contribution Pension Plans
Defined Contribution Plan Disclosure
Cost of defined contribution plans	$ 109	$ 133	$ 335	$ 402