Earnings Per Common Share ("EPS") (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income from continuing operations												$ 1,018
Income from discontinued operations												625
Net Income						$ 436	$ 418	$ 206	$ 280	$ 1,542	$ 1,340	$ 1,643
Weighted-average common shares outstanding (for basic calculation) (in shares)										322.0	347.0	394.0
Effect of dilutive share-based employee compensation (in shares)										7.0	8.0	6.0
Weighted-average common and dilutive potential common shares outstanding (for diluted calculation) (in shares)										329.0	355.0	400.0
Basic EPS (in dollars per share)										$ 4.80	$ 3.86	$ 4.17
Diluted EPS (in dollars per share)										$ 4.69	$ 3.77	$ 4.10
Unexercised employee stock options and stock appreciation rights (in millions) excluded from the diluted EPS computation (in shares)	[1]									2.0	2.3	5.0
Continuing Operations [Member]
Income from continuing operations		$ 334	$ 454	$ 321	$ 433					$ 1,542	$ 1,340	$ 1,018
Basic EPS (in dollars per share)		$ 1.07	$ 1.43	$ 0.99	$ 1.30	$ 1.29	$ 1.21	$ 0.59	$ 0.78	$ 4.80	$ 3.86	$ 2.58
Diluted EPS (in dollars per share)		$ 1.04	$ 1.40	$ 0.97	$ 1.27	$ 1.26	$ 1.18	$ 0.58	$ 0.77	$ 4.69	$ 3.77	$ 2.54
Discontinued Operations [Member]
Income from discontinued operations										$ 0	$ 0	$ 625	[2]
Basic EPS (in dollars per share)												$ 1.59
Diluted EPS (in dollars per share)												$ 1.56

[1] These unexercised employee stock options and stock appreciation rights were not included in the computation of diluted EPS because to do so would have been antidilutive for the periods presented.

[2] Includes Yum China financial results from January 1, 2016 to October 31, 2016.