Investment in SABMiller (AB InBev and SABMiller Business Combination) (Details) £ / shares in Units, £ in Millions, $ in Millions		12 Months Ended
	Nov. 11, 2015 USD ($) shares	Dec. 31, 2015 USD ($)	Nov. 11, 2015 GBP (£) £ / shares	Nov. 11, 2015 USD ($)
Foreign Exchange Option [Member]
Business Acquisition [Line Items]
Notional amount of option			£ 1,625	$ 2,467
Derivative gain		$ 20
Derivative fair value		$ 152
SABMiller Plc [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage (approximately)			27.00%	27.00%
AB InBev and SABMiller [Member]
Business Acquisition [Line Items]
Consideration to be transferred by AB InBev (approximately)	$ 107,000
British pounds in cash for each SABMiller share, offered by AB InBev (GBP per share) | £ / shares			£ 44
Partial share alternative percentage available for SABMiller shares (approximately)			41.00%	41.00%
Partial share alternative, British pounds in cash for each SABMiller share, offered by AB InBev (GBP per share) | £ / shares			£ 3.7788
Expected pre-tax cash received (subject to proration)				$ 2,500
Pre-tax accounting gain (approximately)	12,000
After-tax accounting gain (approximately)	$ 8,000
AB InBev and SABMiller [Member] | Restricted Shares [Member]
Business Acquisition [Line Items]
Partial share alternative, new shares receivable per previously owned share (in shares) | shares	0.483969
Expected economic and voting interests acquired (approximate)			10.50%	10.50%
Restrictive share lock-up period	5 years
Maximum shares that may issued under partial share alternative (in shares) | shares	326,000,000