Taxes on Income - Domestic and Foreign Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income before taxes domestic and foreign operations
Domestic operations	$ 1,857	$ 1,723	$ 2,585
Foreign operations	824	738	603
Income before taxes on income	2,681	2,461	3,188
Federal:
Current	183	489	641
Deferred	68	63	79
Total federal	251	552	720
Foreign:
Current	214	194	133
Deferred	(2)	(3)	(4)
Total foreign	212	191	129
State and local:
Current	81	73	99
Deferred	16	7	12
Total state and local	97	80	111
Total provision for taxes	$ 560	$ 823	$ 960
Reconciliation of federal statutory income tax rate
U.S. federal statutory income tax rate (as a percent)	21.00%	35.00%	35.00%
State and local income taxes (as a percent)	2.80%	2.50%	2.70%
Divestitures (as a percent)	0.00%	0.00%	(4.30%)
Foreign operations (as a percent)	0.20%	(3.90%)	(2.00%)
Impact of TCJA (as a percent)	(0.30%)	6.00%	0.00%
Stock-based compensation (as a percent)	(1.20%)	(2.70%)	0.00%
S&P Dow Jones Indices LLC joint venture (as a percent)	(1.20%)	(1.80%)	(1.20%)
Tax credits and incentives (as a percent)	(1.70%)	(2.10%)	(1.60%)
Other, net (as a percent)	1.30%	0.40%	1.50%
Effective income tax rate (as a percent)	20.90%	33.40%	30.10%