Pension and Postretirement Benefit Plans - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) standardPlan country	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule Of Defined Contribution Plans Disclosures
Maximum amount of certain nonqualified unfunded pension and postretirement benefit plans obligations not included in benefit obligation reconciliation	$ 25	$ 25
U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Company-sponsored retirement plans, minimum number of worldwide plans | standardPlan	98
Company-sponsored retirement plans, number of countries | country	28
Company contributions	$ 143	$ 155
Postretirement Benefits
Schedule Of Defined Contribution Plans Disclosures
Discount rate	5.06%	5.25%	2.88%
Percentage increase (decrease) in discount rate obligation from the prior year	(0.19%)
Company contributions	$ 9	$ 3
Percentage of plan assets within 401h account	83.00%
United States
Schedule Of Defined Contribution Plans Disclosures
Company match of eligible compensation of employee contributions into 401(k)	5.00%
Company cash match of employee contributions for employees hired after January 1, 2009	100.00%
Company contribution to employer retirement income account for employees hired on or after January 1, 2009	3.00%
Expenses related to defined contribution plans	$ 241	$ 241	$ 231
Original percentage medical inflation indexation by company in year	3.00%
Revised percentage medical inflation indexation by company in year	1.50%
United States | U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Discount rate	4.98%	5.18%	2.89%
Percentage increase (decrease) in discount rate obligation from the prior year	(0.20%)
Expected return on assets for next fiscal year (as a percent)	7.75%
Rate of return on plan assets (as a percent)	10.40%	(17.40%)	6.70%
Number years used in the calculation of one average annual actual return on plan assets (in years)	10 years
Number years used in the calculation of a second average annual actual return on plan assets (in years)	25 years
Average annual actual return on plan assets over the past 10 years (as a percent)	7.10%
Average annual actual return on plan assets over the past 25 years (as a percent)	8.00%
Company contributions	$ 60	$ 65
United States | U.S. Pension Plans | Equities
Schedule Of Defined Contribution Plans Disclosures
Asset allocation assumption for next fiscal year (as a percent)	11.00%
United States | U.S. Pension Plans | Private equity
Schedule Of Defined Contribution Plans Disclosures
Asset allocation assumption for next fiscal year (as a percent)	13.00%
United States | U.S. Pension Plans | Fixed income
Schedule Of Defined Contribution Plans Disclosures
Asset allocation assumption for next fiscal year (as a percent)	63.00%
United States | U.S. Pension Plans | Absolute return
Schedule Of Defined Contribution Plans Disclosures
Asset allocation assumption for next fiscal year (as a percent)	13.00%
United States | Pension and Postretirement Benefit plans
Schedule Of Defined Contribution Plans Disclosures
Impact to the Projected Benefit Obligation (PBO) as a result of a change in discount rate	$ 200
Impact to the Projected Benefit Obligation (PBO) as a result of a change in mortality assumption rate	$ 450
United States | Primary U.S. Qualified Pension Plan | U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Expected return on assets (as a percent)	7.50%
International
Schedule Of Defined Contribution Plans Disclosures
Expenses related to defined contribution plans	$ 108	$ 108	$ 117
International | U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Company-sponsored retirement plans, number of countries | country	27
Discount rate	3.99%	4.39%	1.80%
Company contributions	$ 82	$ 90
Company-sponsored retirement plans, minimum number of international plans | standardPlan	84
International | U.S. Pension Plans | Level 3
Schedule Of Defined Contribution Plans Disclosures
Defined benefit plan increase (decrease) related to aggregate of net purchases and net unrealized gains and losses	$ 138	(24)
Defined benefit plan increase (decrease) related to currency exchange rates	6	(42)
Defined benefit plan increase (decrease) related to Level 3 assets	144	$ (66)
Minimum | U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Estimated pension contributions for next fiscal year	$ 100
Minimum | United States
Schedule Of Defined Contribution Plans Disclosures
Company cash match of employee contributions for employees hired prior to January 1, 2009	45.00%
Maximum | U.S. Pension Plans
Schedule Of Defined Contribution Plans Disclosures
Estimated pension contributions for next fiscal year	$ 200
Maximum | United States
Schedule Of Defined Contribution Plans Disclosures
Company cash match of employee contributions for employees hired prior to January 1, 2009	60.00%