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Business Combinations - Pro Forma Supplementary Data (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Asset Acquisition [Line Items]
Historic/pro forma total revenues	$ 644	$ 1,233
Historic/combined pretax income	100	173
Impact of fair value adjustments/useful life changes on depreciation	0	2
Interest expense	0	(1)
Elimination of historic interest	0	1
Elimination of merger related costs	0	1
Pro forma pretax income	100	176
Pro forma adjustments before tax	0
Herc
Asset Acquisition [Line Items]
Historic/pro forma total revenues	640	1,208
Historic/combined pretax income	98	165
Cloverdale
Asset Acquisition [Line Items]
Historic/pro forma total revenues	4	25
Historic/combined pretax income	2	8
Impact of fair value adjustments/useful life changes on depreciation	0	2
Interest expense	0	(1)
Elimination of historic interest	0	1
Elimination of merger related costs	$ 0	$ 1

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 15
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480123/805-50-15-3

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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-Section 50
-Paragraph 2
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-Publisher FASB
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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