Income Taxes - Schedule of Income Before Taxes for Domestic and Foreign Operations and Reconciliation Between U.S. Federal Statutory Tax Rate and Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income from Continuing Operations Before Income Taxes
Domestic	$ 1,774	$ 1,774	$ 1,806
Foreign	1,514	1,620	1,464
Income Before Taxes	$ 3,288	$ 3,394	$ 3,270
Reconciliation Between the U.S. Federal Statutory Tax Rate and The Effective Tax Rate
U.S. federal statutory tax rate	21.00%	21.00%	35.00%
U.S. tax effect of foreign earnings	1.10%	1.50%	0.50%
Tax effect of U.S. federal tax law change	0.00%	(0.10%)	20.10%
State income taxes, net of U.S. federal tax benefit	1.70%	1.60%	1.20%
Differences between U.S. federal statutory and foreign tax rates	2.00%	2.10%	(3.50%)
Nontaxable foreign interest income	(1.40%)	(1.70%)	(1.70%)
Tax effect of foreign dividends	0.20%	1.00%	0.40%
Tax relief for U.S. manufacturers	0.00%	0.00%	(1.40%)
Excess tax benefits from stock-based compensation	(0.90%)	(0.30%)	(1.50%)
Other, net	(0.40%)	(0.60%)	(0.70%)
Effective tax rate	23.30%	24.50%	48.40%