Taxes on Income - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense (benefit) related to the TCJA		$ 149
Income tax expense (benefit) from repatriation of foreign earnings related to the TCJA		173
Income tax expense (benefit) from change in tax rate related to the TCJA		(24)
Undistributed earnings of foreign subsidiaries for income tax purposes	$ 2,300
Undistributed earnings of foreign subsidiaries reinvested indefinitely	784
Net income tax payments	558	709	$ 683
Operating loss carryforwards	691
Total amount of federal, state and local, and foreign unrecognized tax benefits excluding interest and penalties	147	212	$ 221	$ 162
Decrease in unrecognized tax benefits reasonably possible	40
Accrued interest and penalties associated with uncertain tax positions	$ 35	$ 59