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Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Summary of Significant Non-Cash Investing and Financing Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Significant non-cash investing and financing activities
Other payable issued for agency acquisitions and purchased customer accounts	$ 4	$ 2
Estimated acquisition earn-out payables issued for agency acquisitions	$ 5	$ 9

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- Definition

Other payable issued for agency acquisitions and purchased customer accounts.

+ References

No definition available.

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- Definition

Recorded Earn-out Payable

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- References

No definition available.

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