Taxes on Income (Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 980	$ 740	$ 747
State	109	99	72
Total current	1,089	839	819
Deferred:
Federal	13	(6)	(23)
State	2	(1)	(2)
Total deferred	15	(7)	(25)
Taxes on income	$ 1,104	$ 832	$ 794