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Summary of Significant Accounting Policies Activity in Goodwill by Segment (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Goodwill [Roll Forward]
Balance at December 31, 2022	$ 2,900.4
Net restaurant purchases (sales)	107.4
Currency translation	32.6
Balance at December 31, 2023	3,040.4
U.S.
Goodwill [Roll Forward]
Balance at December 31, 2022	1,815.2
Net restaurant purchases (sales)	17.7
Currency translation	0.0
Balance at December 31, 2023	1,832.9
International Operated Markets
Goodwill [Roll Forward]
Balance at December 31, 2022	1,085.2
Net restaurant purchases (sales)	89.7
Currency translation	32.6
Balance at December 31, 2023	1,207.5
International Developmental Licensed Markets & Corporate
Goodwill [Roll Forward]
Balance at December 31, 2022	0.0
Net restaurant purchases (sales)	0.0
Currency translation	0.0
Balance at December 31, 2023	$ 0.0

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