Income Taxes (Narrative) (Details) $ / shares in Units, $ in Millions, kr in Billions		3 Months Ended			12 Months Ended
	Dec. 31, 2017	Dec. 31, 2022 USD ($)	Apr. 02, 2021 USD ($)	Apr. 02, 2021 DKK (kr)	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2017	Dec. 31, 2019 USD ($)
Net deferred tax liabilities		$ 2,958			$ 2,958	$ 3,563
Valuation allowance, deferred tax asset, change in amount					6
Basis differences in investments outside the U.S.		10,400			$ 10,400
Statutory federal income tax rate	21.00%				21.00%	21.00%	21.00%	35.00%
Effective income tax rate					13.10%	16.50%	18.90%
Effective income tax rate reconciliation, other reconciling items, percent					6.10%	3.50%	0.70%
Income tax payments					$ 1,800	$ 1,700	$ 1,100
Employee service share-based compensation, tax benefit from exercise of stock options					85	118	110
Tax benefit					61	95	85
Net operating loss carryforwards		346			346
Operating loss carryforwards, valuation allowances		147			147
Deferred tax assets, valuation allowances		236			236	242
Gross unrecognized tax benefits		1,139			1,139	1,095	1,175		$ 1,181
Unrecognized tax benefits, net of offsetting indirect tax benefits		1,200			1,200	1,200
Unrecognized tax benefits, indirect tax benefits		65			65	58
Potential interest and penalties		171			171	163
Recognized potential interest and penalties					14	182	$ 41
Unrecognized tax benefits that would impact effective tax rate		1,200			1,200	$ 1,100
Estimated reduction in unrecognized tax benefits within twelve months		(306)			$ (306)
Income tax holiday, income tax benefits per diluted common share | $ / shares					$ 0.10	$ 0.08	$ 0.06
General business and foreign tax credit
Tax credit carryforwards		133			$ 133
Tax credit carryforward, valuation allowance		80			80
Deferred tax asset, other
Deferred tax assets, valuation allowances		9			9
Domestic tax authority | IRS
Proposed adjustments to taxable income, self-insurance, other		2,500
Foreign tax authority
Income tax examination, amount of tax assessments 2010-2015			$ 298	kr 2.1
Income tax holiday, aggregate dollar amount					72	$ 59	$ 43
United States
Net deferred tax liabilities		1,900			1,900	2,100
Non-U.S.
Net deferred tax liabilities		$ 1,100			$ 1,100	$ 1,500