Post-Employment Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 280	$ 282
Medical and Dental Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 28	$ 28

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration