Amounts in Paragraphs - Income Taxes (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective income tax rate	12.40%	16.10%	21.60%
IT services divestiture nondeductible goodwill	$ 0	$ 0	$ 250
Significant matters affecting comparability	(3.80%)	1.20%
Income taxes paid, net	$ 1,200	$ 1,500	$ 1,300
Income Taxes Receivable	1,500	$ 850
Tax Credit Carryforward, Amount	615
Operating Loss Carryforwards	358
Tax Credit Carryforward, Valuation Allowance	344
Operating Loss Carryforwards, Valuation Allowance	$ 46