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Long term retention program ("LTRP") - Long Term Retention Program Accrued Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	$ 47	$ 30
LTRP 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	0	(1)
LTRP 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	2	0
LTRP 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	5	6
LTRP 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	6	7
LTRP 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	7	8
LTRP 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	13	10
LTRP 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total LTRP	$ 14	$ 0

X

- Definition

Amount of cost capitalized for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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+ References

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