Taxes on Income - Domestic and Foreign Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income before taxes domestic and foreign operations
Domestic operations	$ 1,723	$ 2,585	$ 1,266
Foreign operations	738	603	549
Income before taxes on income	2,461	3,188	1,815
Federal:
Current	489	641	90
Deferred	63	79	276
Total federal	552	720	366
Foreign:
Current	194	133	111
Deferred	(3)	(4)	(1)
Total foreign	191	129	110
State and local:
Current	73	99	34
Deferred	7	12	37
Total state and local	80	111	71
Total provision for taxes	$ 823	$ 960	$ 547
Reconciliation of federal statutory income tax rate
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
State and local income taxes	2.50%	2.70%	2.60%
Divestitures	0.00%	(4.30%)	0.00%
Foreign operations	(3.90%)	(2.00%)	(3.20%)
Impact of TCJA	6.00%	0.00%	0.00%
Stock-based compensation	(2.70%)	0.00%	0.00%
S&P Dow Jones Indices LLC joint venture	(1.80%)	(1.20%)	(2.00%)
Tax credits and incentives	(2.10%)	(1.60%)	(2.90%)
Other, net	0.40%	1.50%	0.60%
Effective income tax rate	33.40%	30.10%	30.10%