Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 1,430	$ 1,253
Receivables	144	142
Inventories:
Leaf tobacco	810	941
Other raw materials	191	170
Work in process	501	560
Finished product	621	554
Inventory, net	2,123	2,225
Due from Altria and subsidiaries	0	0
Income taxes	182	461
Other current assets	252	263
Total current assets	4,131	4,344
Property, plant and equipment, at cost	4,818	4,879
Less accumulated depreciation	2,940	2,965
Property, plant and equipment, net	1,878	1,914
Goodwill	5,307	5,307
Other intangible assets, net	12,405	12,400
Investment in AB InBev	18,178	17,952
Investment in consolidated subsidiaries	0	0
Finance assets, net	856	899
Due from Altria and subsidiaries	0	0
Other assets	422	386
Total Assets	43,177	43,202
Liabilities
Current portion of long-term debt	864	864
Accounts payable	209	374
Accrued liabilities:
Marketing	699	695
Employment costs	108	188
Settlement charges	2,105	2,442
Other	1,078	971
Dividends payable	1,325	1,258
Due to Altria and subsidiaries	0	0
Total current liabilities	6,388	6,792
Long-term debt	13,036	13,030
Deferred income taxes	5,376	5,247
Accrued pension costs	323	445
Accrued postretirement health care costs	1,989	1,987
Due to Altria and subsidiaries	0	0
Other liabilities	230	283
Total liabilities	27,342	27,784
Contingencies
Redeemable noncontrolling interest	37	38
Stockholders’ Equity
Common stock	935	935
Additional paid-in capital	5,948	5,952
Earnings reinvested in the business	43,369	42,251
Accumulated other comprehensive losses	(1,652)	(1,897)
Cost of repurchased stock	(32,804)	(31,864)
Total stockholders’ equity attributable to Altria	15,796	15,377
Noncontrolling interests	2	3
Total stockholders’ equity	15,798	15,380	$ 12,773
Total Liabilities and Stockholders’ Equity	43,177	43,202
Reportable Legal Entities [Member] | Altria Group, Inc. [Member]
Assets
Cash and cash equivalents	1,393	1,203
Receivables	0	1
Inventories:
Leaf tobacco	0	0
Other raw materials	0	0
Work in process	0	0
Finished product	0	0
Inventory, net	0	0
Due from Altria and subsidiaries	12	2
Income taxes	190	0
Other current assets	48	11
Total current assets	1,643	1,217
Property, plant and equipment, at cost	0	0
Less accumulated depreciation	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investment in AB InBev	18,178	17,952
Investment in consolidated subsidiaries	14,176	13,111
Finance assets, net	0	0
Due from Altria and subsidiaries	4,790	4,790
Other assets	52	34
Total Assets	38,839	37,104
Liabilities
Current portion of long-term debt	864	864
Accounts payable	3	2
Accrued liabilities:
Marketing	0	0
Employment costs	13	21
Settlement charges	0	0
Other	281	389
Dividends payable	1,325	1,258
Due to Altria and subsidiaries	4,283	3,040
Total current liabilities	6,769	5,574
Long-term debt	13,036	13,030
Deferred income taxes	2,925	2,809
Accrued pension costs	202	206
Accrued postretirement health care costs	0	0
Due to Altria and subsidiaries	0	0
Other liabilities	111	108
Total liabilities	23,043	21,727
Contingencies
Redeemable noncontrolling interest	0	0
Stockholders’ Equity
Common stock	935	935
Additional paid-in capital	5,948	5,952
Earnings reinvested in the business	43,369	42,251
Accumulated other comprehensive losses	(1,652)	(1,897)
Cost of repurchased stock	(32,804)	(31,864)
Total stockholders’ equity attributable to Altria	15,796	15,377
Noncontrolling interests	0	0
Total stockholders’ equity	15,796	15,377
Total Liabilities and Stockholders’ Equity	38,839	37,104
Reportable Legal Entities [Member] | PM USA [Member]
Assets
Cash and cash equivalents	1	1
Receivables	9	10
Inventories:
Leaf tobacco	456	579
Other raw materials	114	111
Work in process	5	5
Finished product	170	128
Inventory, net	745	823
Due from Altria and subsidiaries	3,673	2,413
Income taxes	39	542
Other current assets	144	147
Total current assets	4,611	3,936
Property, plant and equipment, at cost	2,896	2,930
Less accumulated depreciation	2,085	2,086
Property, plant and equipment, net	811	844
Goodwill	0	0
Other intangible assets, net	2	2
Investment in AB InBev	0	0
Investment in consolidated subsidiaries	2,835	2,818
Finance assets, net	0	0
Due from Altria and subsidiaries	0	0
Other assets	690	671
Total Assets	8,949	8,271
Liabilities
Current portion of long-term debt	0	0
Accounts payable	71	91
Accrued liabilities:
Marketing	574	578
Employment costs	11	14
Settlement charges	2,098	2,437
Other	576	433
Dividends payable	0	0
Due to Altria and subsidiaries	368	317
Total current liabilities	3,698	3,870
Long-term debt	0	0
Deferred income taxes	0	0
Accrued pension costs	0	0
Accrued postretirement health care costs	1,214	1,214
Due to Altria and subsidiaries	0	0
Other liabilities	29	49
Total liabilities	4,941	5,133
Contingencies
Redeemable noncontrolling interest	0	0
Stockholders’ Equity
Common stock	0	0
Additional paid-in capital	3,310	3,310
Earnings reinvested in the business	958	96
Accumulated other comprehensive losses	(260)	(268)
Cost of repurchased stock	0	0
Total stockholders’ equity attributable to Altria	4,008	3,138
Noncontrolling interests	0	0
Total stockholders’ equity	4,008	3,138
Total Liabilities and Stockholders’ Equity	8,949	8,271
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	36	49
Receivables	135	131
Inventories:
Leaf tobacco	354	362
Other raw materials	77	59
Work in process	496	555
Finished product	451	426
Inventory, net	1,378	1,402
Due from Altria and subsidiaries	1,057	1,022
Income taxes	0	17
Other current assets	60	105
Total current assets	2,666	2,726
Property, plant and equipment, at cost	1,922	1,949
Less accumulated depreciation	855	879
Property, plant and equipment, net	1,067	1,070
Goodwill	5,307	5,307
Other intangible assets, net	12,403	12,398
Investment in AB InBev	0	0
Investment in consolidated subsidiaries	0	0
Finance assets, net	856	899
Due from Altria and subsidiaries	0	0
Other assets	153	157
Total Assets	22,452	22,557
Liabilities
Current portion of long-term debt	0	0
Accounts payable	135	281
Accrued liabilities:
Marketing	125	117
Employment costs	84	153
Settlement charges	7	5
Other	268	247
Dividends payable	0	0
Due to Altria and subsidiaries	91	80
Total current liabilities	710	883
Long-term debt	0	0
Deferred income taxes	2,924	2,914
Accrued pension costs	121	239
Accrued postretirement health care costs	775	773
Due to Altria and subsidiaries	4,790	4,790
Other liabilities	90	126
Total liabilities	9,410	9,725
Contingencies
Redeemable noncontrolling interest	37	38
Stockholders’ Equity
Common stock	9	9
Additional paid-in capital	12,221	12,045
Earnings reinvested in the business	2,206	2,243
Accumulated other comprehensive losses	(1,433)	(1,506)
Cost of repurchased stock	0	0
Total stockholders’ equity attributable to Altria	13,003	12,791
Noncontrolling interests	2	3
Total stockholders’ equity	13,005	12,794
Total Liabilities and Stockholders’ Equity	22,452	22,557
Total Consolidating Adjustments [Member]
Assets
Cash and cash equivalents	0	0
Receivables	0	0
Inventories:
Leaf tobacco	0	0
Other raw materials	0	0
Work in process	0	0
Finished product	0	0
Inventory, net	0	0
Due from Altria and subsidiaries	(4,742)	(3,437)
Income taxes	(47)	(98)
Other current assets	0	0
Total current assets	(4,789)	(3,535)
Property, plant and equipment, at cost	0	0
Less accumulated depreciation	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investment in AB InBev	0	0
Investment in consolidated subsidiaries	(17,011)	(15,929)
Finance assets, net	0	0
Due from Altria and subsidiaries	(4,790)	(4,790)
Other assets	(473)	(476)
Total Assets	(27,063)	(24,730)
Liabilities
Current portion of long-term debt	0	0
Accounts payable	0	0
Accrued liabilities:
Marketing	0	0
Employment costs	0	0
Settlement charges	0	0
Other	(47)	(98)
Dividends payable	0	0
Due to Altria and subsidiaries	(4,742)	(3,437)
Total current liabilities	(4,789)	(3,535)
Long-term debt	0	0
Deferred income taxes	(473)	(476)
Accrued pension costs	0	0
Accrued postretirement health care costs	0	0
Due to Altria and subsidiaries	(4,790)	(4,790)
Other liabilities	0	0
Total liabilities	(10,052)	(8,801)
Contingencies
Redeemable noncontrolling interest	0	0
Stockholders’ Equity
Common stock	(9)	(9)
Additional paid-in capital	(15,531)	(15,355)
Earnings reinvested in the business	(3,164)	(2,339)
Accumulated other comprehensive losses	1,693	1,774
Cost of repurchased stock	0	0
Total stockholders’ equity attributable to Altria	(17,011)	(15,929)
Noncontrolling interests	0	0
Total stockholders’ equity	(17,011)	(15,929)
Total Liabilities and Stockholders’ Equity	$ (27,063)	$ (24,730)