Other Revenues and Other Expenses Other Revenues (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Receivables related to revenues from service contracts from customers	$ 238	$ 226

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480833/946-310-45-1

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-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
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-Topic 946
-SubTopic 210
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-Topic 954
-SubTopic 310
-Name Accounting Standards Codification
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-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481058/954-310-45-1

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant