Taxes on Income - Domestic and Foreign Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income before taxes domestic and foreign operations
Domestic operations	$ 2,226	$ 2,068	$ 1,857
Foreign operations	1,002	862	824
Income before taxes on income	3,228	2,930	2,681
Federal:
Current	349	303	198
Deferred	1	13	53
Total federal	350	316	251
Foreign:
Current	246	201	214
Deferred	(9)	14	(2)
Total foreign	237	215	212
State and local:
Current	111	93	84
Deferred	(4)	3	13
Total state and local	107	96	97
Total provision for taxes	$ 694	$ 627	$ 560
Reconciliation of federal statutory income tax rate
U.S. federal statutory income tax rate (as a percent)	21.00%	21.00%	21.00%
State and local income taxes (as a percent)	3.00%	2.60%	2.80%
Foreign operations (as a percent)	(0.30%)	(0.30%)	0.20%
Impact of TCJA (as a percent)	0.00%	0.00%	(0.30%)
Stock-based compensation (as a percent)	(0.70%)	(1.40%)	(1.20%)
S&P Dow Jones Indices LLC joint venture (as a percent)	(1.20%)	(1.20%)	(1.20%)
Tax credits and incentives (as a percent)	(2.20%)	(1.70%)	(1.70%)
Other, net (as a percent)	1.90%	2.40%	1.30%
Effective income tax rate (as a percent)	21.50%	21.40%	20.90%