Background and Basis of Presentation (Narrative) (Details) - USD ($)
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
15 Months Ended |
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Oct. 24, 2016 |
Oct. 31, 2016 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Oct. 10, 2016 |
Jul. 31, 2015 |
Jul. 31, 2014 |
| Equity, Class of Treasury Stock [Line Items] |
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| Increase in quarterly dividend |
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8.00%
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| Dividends declared (usd per share) |
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$ 0.61
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$ 0.565
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$ 1.74
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$ 1.605
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$ 2.17
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| Annualized dividend rate |
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$ 2.44
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| Repurchase of common stock (shares) |
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2,600,000
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1,200,000
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8,100,000
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10,000,000
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| Average price of repurchased shares, per share (usd per share) |
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$ 66.23
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$ 50.39
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$ 63.28
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$ 51.47
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| Debt issuance costs |
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$ 79,000,000
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$ 79,000,000
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| Accounting Standards Update 2015-03 [Member] | Other Assets [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Debt issuance costs |
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$ (72,000,000)
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| Accounting Standards Update 2015-03 [Member] | Long-term Debt [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Debt issuance costs |
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$ 72,000,000
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| July 2014 Share Repurchase Program [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Planned share repurchase program |
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$ 1,000,000,000
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| Repurchase of common stock (shares) |
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20,400,000.0
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| Average price of repurchased shares, per share (usd per share) |
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$ 48.90
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| July 2015 Share Repurchase Program [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Planned share repurchase program |
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$ 1,000,000,000
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| Remaining authorized repurchase amount |
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$ 453,000,000
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$ 453,000,000
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| SABMiller [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Equity method investment, ownership percentage (approximately) |
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27.00%
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27.00%
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| Subsequent Event [Member] | July 2015 Share Repurchase Program [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Planned share repurchase program |
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$ 3,000,000,000
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| Additional authorized amount |
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$ 2,000,000,000
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| Subsequent Event [Member] | SABMiller [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Shares owned/shares purchased (in shares) |
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430,000,000
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| Subsequent Event [Member] | AB InBev [Member] |
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| Equity, Class of Treasury Stock [Line Items] |
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| Equity method investment, ownership percentage (approximately) |
10.20%
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9.60%
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| Shares owned/shares purchased (in shares) |
12,341,937
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| Total cost of AB InBev shares purchased |
$ 1,600,000,000
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