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Restaurant Information (Restaurant Information by Ownership Type) (Details) - Restaurant	Mar. 31, 2022	Mar. 31, 2021
Franchisor Disclosure [Line Items]
Number of restaurants	40,344	39,160
Franchised
Franchisor Disclosure [Line Items]
Number of restaurants	37,552	36,484
Franchised | Conventional franchised
Franchisor Disclosure [Line Items]
Number of restaurants	21,558	21,496
Franchised | Developmental licensed
Franchisor Disclosure [Line Items]
Number of restaurants	7,981	7,705
Franchised | Affiliated
Franchisor Disclosure [Line Items]
Number of restaurants	8,013	7,283
Company-operated
Franchisor Disclosure [Line Items]
Number of restaurants	2,792	2,676

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