Taxes on Income - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	24.20%	23.60%	24.70%	24.20%
Income Tax [Line Items]
Tax expense (benefit)	$ 699	$ 566	$ 1,487	$ 1,108
Deferred other tax expense (benefit)				75
Internal Revenue Service (IRS)
Income Tax [Line Items]
Tax expense (benefit)				$ (370)