Other Comprehensive Earnings/Losses (Reclassifications) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings (loss) before income taxes		$ 2,289	$ 2,114	$ 6,105	$ 5,865
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Loss	[1]	72	44	222	140
Prior service cost/credit	[1]	(8)	(8)	(24)	(24)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	[1]	64	36	198	116
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings (loss) before income taxes		69	89	212	172
Reclassification out of Accumulated Other Comprehensive Income [Member] | SABMiller Plc [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings (loss) before income taxes	[2]	$ 5	$ 53	$ 14	$ 56

[1] Amounts are included in net defined benefit plan costs. For further details, see Note 3. Benefit Plans.

[2] Amounts are included in earnings from equity investment in SABMiller.