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Equity - Share-based Payments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based compensation expense
Pre-tax compensation expense	$ 5	$ 8	$ 14	$ 15
Income tax benefit	0	(1)	(1)	(2)
Total share-based compensation expense, net of income taxes	5	7	13	13
Stock options
Share-based compensation expense
Pre-tax compensation expense	1	1	2	2
Income tax benefit	0	0	0	0
Total share-based compensation expense, net of income taxes	1	1	2	2
Restricted Stock Units ("RSUs") | Employee
Share-based compensation expense
Pre-tax compensation expense	3	3	7	6
Income tax benefit	0	(1)	(1)	(1)
Total share-based compensation expense, net of income taxes	3	2	6	5
Performance shares and other share-based awards
Share-based compensation expense
Pre-tax compensation expense	1	4	5	7
Income tax benefit	0	0	0	(1)
Total share-based compensation expense, net of income taxes	$ 1	$ 4	$ 5	$ 6

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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