Tax Matters (Taxes on Income) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Taxes on Income [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	[1]	$ 1,996	$ 1,801	$ 1,690
Deferred income taxes:
Total U.S. tax provision	[2],[3]	$ 360	$ 301	$ 266
International:
U.S. statutory income tax rate		21.00%	21.00%	21.00%
State and local taxes, net of federal benefits		0.90%	0.60%	1.80%
Taxation of non-U.S. operations	[4]	(1.60%)	(3.10%)	(0.30%)
Unrecognized tax benefits and tax settlements and resolution of certain tax positions	[5]	0.10%	0.50%	1.20%
Tax Cuts And Jobs Act of 2017 impact of change in tax law	[6]	0.00%	0.00%	3.90%
Impact of tax accounting method changes		0.00%	0.00%	1.30%
U.S. Research and Development Tax Credit and U.S. Domestic Production Activities deduction		(0.70%)	(0.70%)	(0.50%)
Stock-based compensation		(1.30%)	(1.00%)	(0.80%)
Non-deductible / non-taxable items		0.40%	(0.20%)	(1.60%)
All other—net		(0.80%)	(0.40%)	0.10%
Effective tax rate		18.00%	16.70%	15.70%
International
International:
Total international tax provision		$ 135	$ 101	$ 139
United States
Deferred income taxes:
Total U.S. tax provision		225	200	127
United States
Taxes on Income [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		1,109	965	937
Current income taxes:
Federal		232	192	199
State and local		36	28	32
Deferred income taxes:
Federal		(29)	(5)	(107)
State and local		(14)	(15)	3
International
Taxes on Income [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		887	836	753
International:
Current income taxes		154	161	148
Deferred income taxes		(19)	(60)	(9)
Share-based Payments [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		29	20	15
Change in Valuation Allowances [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		5	18
Change in Tax Basis [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes			14
Other Tax Items [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		19	12
Statutory Tax Rates [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		4	8	5
Business Acquisitions [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		7
Tax Settlements [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes		$ 4	$ 10
Tax Act [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes				45
Tax Accounting Method [Member]
International:
Discrete tax benefit related to revaluation of deferred taxes				$ 23

[1] Defined as income before provision for taxes on income.

[2] In 2020, the Provision for taxes on income reflects the following: •the change in the jurisdictional mix of earnings, which includes the impact of the location of earnings from operations and repatriation costs. The jurisdictional mix of earnings can vary as a result of repatriation decisions, operating fluctuations in the normal course of business, the impact of non-deductible and non-taxable items, and the extent and location of other income and expense items, such as gains and losses on asset divestitures; •U.S. tax benefit related to U.S. Research and Development Tax Credit; •tax expense related to changes in uncertain tax positions (see D. Tax Contingencies); •a $29 million discrete tax benefit recorded in 2020 related to the excess tax benefits for share-based payments; •a $19 million net discrete tax benefit recorded in 2020 related to changes in various other tax items; •a $7 million discrete tax benefit recorded in 2020 related to the remeasurement of deferred taxes resulting from the integration of acquired businesses; •a $5 million discrete tax expense related to the changes in valuation allowances; •a $4 million discrete tax benefit recorded in 2020 related to a remeasurement of deferred tax assets and liabilities as a result of changes in statutory tax rates; and •a $4 million net discrete tax benefit recorded in 2020 related to the effective settlement of certain issues with tax authorities. (b)     In 2019, the Provision for taxes on income reflects the following: •the change in the jurisdictional mix of earnings, which includes the impact of the location of earnings from operations and repatriation costs. The jurisdictional mix of earnings can vary as a result of repatriation decisions, operating fluctuations in the normal course of business, the impact of non-deductible and non-taxable items, and the extent and location of other income and expense items, such as gains and losses on asset divestitures; •U.S. tax benefit related to U.S. Research and Development Tax Credit; •tax expense related to changes in uncertain tax positions (see D. Tax Contingencies); •the impact of the GILTI tax, a new provision of the Tax Act, which became effective for the company in the first quarter of 2019; •a $20 million discrete tax benefit recorded in 2019 related to the excess tax benefits for share-based payments; •an $18 million discrete tax benefit related to the changes in valuation allowances; •a $14 million net discrete tax benefit recorded in the third quarter of 2019 due to a change in tax basis related to purchase accounting; •a $12 million net discrete tax benefit recorded in 2019 related to changes in various other tax items; •a $10 million net discrete tax benefit recorded in 2019 related to the effective settlement of certain issues with tax authorities; and •an $8 million discrete tax benefit recorded in 2019 related to a remeasurement of deferred tax assets and liabilities as a result of changes in statutory tax rates.

[3] In 2018, the Provision for taxes on income reflects the following: •the change in the jurisdictional mix of earnings, which includes the impact of the location of earnings from operations and repatriation costs. The jurisdictional mix of earnings can vary as a result of repatriation decisions, operating fluctuations in the normal course of business, the impact of non-deductible and non-taxable items, and the extent and location of other income and expense items, such as gains and losses on asset divestitures; •U.S. tax benefit related to U.S Research and Development Tax Credit; •tax expense related to the changes in valuation allowances and the resolution of other tax items; •tax expense related to changes in uncertain tax positions (see D. Tax Contingencies): •the reduction of the U.S. federal corporate income tax rate, from 35% to 21%, effective January 1, 2018, pursuant to the Tax Act; •a $45 million net tax benefit recorded in 2018 associated with a measurement-period adjustment to the one-time mandatory deemed repatriation tax on the company’s undistributed non-U.S. earnings pursuant to the Tax Act; •a $23 million discrete tax benefit recorded in 2018 related to the favorable impact of certain tax accounting method changes; •a $15 million discrete tax benefit recorded in 2018 related to the excess tax benefits for share-based payments; and •a $5 million discrete tax benefit recorded in 2018 related to a remeasurement of deferred tax assets and liabilities as a result of changes in statutory tax rates.

[4] he rate impact of taxation of non-U.S. operations was a decrease to our effective tax rate due to the jurisdictional mix of earnings.

[5] For a discussion about unrecognized tax benefits and tax settlements and resolution of certain tax positions, see above in this section and D. Tax Contingencies.

[6] In 2018, the rate impact related to the Tax Act was a decrease to our effective tax rate. This tax benefit represents the measurement-period adjustment related to the one-time mandatory deemed repatriation tax on the company’s undistributed non-U.S. earnings.