Severance (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($) employee	Dec. 31, 2022 USD ($) employee	Dec. 31, 2021 USD ($) employee
Restructuring and Related Activities [Abstract]
Number of eligible employees \| employee	682	233	290
Severance expense \| $	$ 102	$ 65	$ 69

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration