Background and Basis of Presentation (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016	Oct. 31, 2016	Sep. 30, 2016	Jul. 31, 2015
SABMiller [Member]
Equity, Class of Treasury Stock [Line Items]
Equity method investment, ownership percentage (approximately)					27.00%
AB InBev [Member]
Equity, Class of Treasury Stock [Line Items]
Equity method investment, ownership percentage (approximately)		10.20%	10.20%	9.60%
Pre-tax gain on change in fair value of derivative financial instrument	$ 40,000,000
Shares owned/shares purchased (in shares) (approximately)			12
July 2015 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Planned share repurchase program				$ 3,000,000,000		$ 1,000,000,000
Remaining authorized repurchase amount		$ 1,384,000,000