Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue From Contract With Customer [Line Items]
Prepaid gift cards expiration period	36 months
Product vouchers maximum expiration period	12 months
Points expiration period	18 months
Number of days from the period in which the corresponding sales occur that trade receivables are generally due	30 days
Provision for accounts receivable	$ 2		$ 1
Receivables due from unconsolidated affiliates including trade receivables and dividend receivables	96		50
Impairment losses related to costs to obtain contracts	0		0
Costs to obtain contracts	8		$ 9
Revenue recognized	$ 71	$ 38
KFC [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	10 years
Pizza Hut [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	10 years
Little Sheep [Member] | Minimum [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	5 years
Little Sheep [Member] | Maximum [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	10 years
Huang Ji Huang | Minimum [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	3 years
Huang Ji Huang | Maximum [Member]
Revenue From Contract With Customer [Line Items]
Franchisee agreement term	10 years