Background and Basis of Presentation (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jul. 31, 2017	Oct. 31, 2016	Jul. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Common stock, increase (decrease) in dividend rate, percentage	8.20%
Dividends declared (usd per share)	$ 0.66	$ 0.61	$ 1.88	$ 1.74	$ 2.35
Annualized dividend rate			$ 2.64
Legacy AB InBev [Member]
Equity, Class of Treasury Stock [Line Items]
Equity method investment, ownership percentage (approximately)							9.60%
SABMiller [Member]
Equity, Class of Treasury Stock [Line Items]
Equity method investment, ownership percentage (approximately)		27.00%		27.00%
AB InBev [Member]
Equity, Class of Treasury Stock [Line Items]
Equity method investment, ownership percentage (approximately)	10.20%		10.20%		10.20%
Shares owned/shares purchased (in shares) (approximately)					12
Pretax gain on divestiture of business	$ 37,000,000		$ 445,000,000
Pre-tax gain on change in fair value of derivative financial instrument		$ 48,000,000		$ 205,000,000
July 2015 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Planned share repurchase program						$ 4,000,000,000	$ 3,000,000,000	$ 1,000,000,000
Remaining authorized repurchase amount	$ 576,000,000		$ 576,000,000