Other Comprehensive Earnings/Losses (Reclassifications) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings (loss) before income taxes	$ 1,562		$ 1,806
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings (loss) before income taxes	72		44
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Loss	76	[1]	49	[1]
Prior service cost/credit	(8)	[1]	(8)	[1]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	68	[1]	41	[1]
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	$ 4	[2]	$ 3	[2]

[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.