Condensed Consolidating Financial Information (Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Provided by (Used In) Operating Activities
Net cash provided by (used in) operating activities	$ 3,129	$ 2,289
Cash Provided by (Used in) Investing Activities
Capital expenditures	(52)	(38)
Investment in Cronos	0	(1,831)
Investment in consolidated subsidiaries	0	0
Other, net	0	(81)
Net cash provided by (used in) investing activities	(52)	(1,950)
Cash Provided by (Used in) Financing Activities
Proceeds from short-term borrowings	3,000	0
Repayment of short-term borrowings	0	(12,800)
Long-term debt issued	0	16,265
Long-term debt repaid	(1,000)	0
Repurchases of common stock	0	(151)
Dividends paid on common stock	(1,563)	(1,502)
Changes in amounts due to/from Altria Group, Inc. and subsidiaries	0	0
Cash dividends paid to parent	0	0
Other, net	(10)	(129)
Net cash provided by (used in) financing activities	427	1,683
Cash, cash equivalents and restricted cash:
Increase (decrease)	3,504	2,022
Balance at beginning of period	2,160	1,433
Balance at end of period	5,664	3,455
Reportable Legal Entities [Member] | Altria Group, Inc. [Member]
Cash Provided by (Used In) Operating Activities
Net cash provided by (used in) operating activities	1,515	1,642
Cash Provided by (Used in) Investing Activities
Capital expenditures	0	0
Investment in Cronos		0
Investment in consolidated subsidiaries	(1)	(1,947)
Other, net	0	(3)
Net cash provided by (used in) investing activities	(1)	(1,950)
Cash Provided by (Used in) Financing Activities
Proceeds from short-term borrowings	3,000
Repayment of short-term borrowings		(12,800)
Long-term debt issued		16,265
Long-term debt repaid	(1,000)
Repurchases of common stock		(151)
Dividends paid on common stock	(1,563)	(1,502)
Changes in amounts due to/from Altria Group, Inc. and subsidiaries	1,584	657
Cash dividends paid to parent	0	0
Other, net	(9)	(120)
Net cash provided by (used in) financing activities	2,012	2,349
Cash, cash equivalents and restricted cash:
Increase (decrease)	3,526	2,041
Balance at beginning of period	2,022	1,277
Balance at end of period	5,548	3,318
Reportable Legal Entities [Member] | PM USA [Member]
Cash Provided by (Used In) Operating Activities
Net cash provided by (used in) operating activities	3,351	2,520
Cash Provided by (Used in) Investing Activities
Capital expenditures	(15)	(9)
Investment in Cronos		0
Investment in consolidated subsidiaries	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	(15)	(9)
Cash Provided by (Used in) Financing Activities
Proceeds from short-term borrowings	0
Repayment of short-term borrowings		0
Long-term debt issued		0
Long-term debt repaid	0
Repurchases of common stock		0
Dividends paid on common stock	0	0
Changes in amounts due to/from Altria Group, Inc. and subsidiaries	(1,582)	(771)
Cash dividends paid to parent	(1,748)	(1,737)
Other, net	0	0
Net cash provided by (used in) financing activities	(3,330)	(2,508)
Cash, cash equivalents and restricted cash:
Increase (decrease)	6	3
Balance at beginning of period	43	100
Balance at end of period	49	103
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Cash Provided by (Used In) Operating Activities
Net cash provided by (used in) operating activities	437	166
Cash Provided by (Used in) Investing Activities
Capital expenditures	(37)	(29)
Investment in Cronos		(1,831)
Investment in consolidated subsidiaries	0	0
Other, net	0	(78)
Net cash provided by (used in) investing activities	(37)	(1,938)
Cash Provided by (Used in) Financing Activities
Proceeds from short-term borrowings	0
Repayment of short-term borrowings		0
Long-term debt issued		0
Long-term debt repaid	0
Repurchases of common stock		0
Dividends paid on common stock	0	0
Changes in amounts due to/from Altria Group, Inc. and subsidiaries	(1)	2,061
Cash dividends paid to parent	(426)	(302)
Other, net	(1)	(9)
Net cash provided by (used in) financing activities	(428)	1,750
Cash, cash equivalents and restricted cash:
Increase (decrease)	(28)	(22)
Balance at beginning of period	95	56
Balance at end of period	67	34
Total Consolidating Adjustments [Member]
Cash Provided by (Used In) Operating Activities
Net cash provided by (used in) operating activities	(2,174)	(2,039)
Cash Provided by (Used in) Investing Activities
Capital expenditures	0	0
Investment in Cronos		0
Investment in consolidated subsidiaries	1	1,947
Other, net	0	0
Net cash provided by (used in) investing activities	1	1,947
Cash Provided by (Used in) Financing Activities
Proceeds from short-term borrowings	0
Repayment of short-term borrowings		0
Long-term debt issued		0
Long-term debt repaid	0
Repurchases of common stock		0
Dividends paid on common stock	0	0
Changes in amounts due to/from Altria Group, Inc. and subsidiaries	(1)	(1,947)
Cash dividends paid to parent	2,174	2,039
Other, net	0	0
Net cash provided by (used in) financing activities	2,173	92
Cash, cash equivalents and restricted cash:
Increase (decrease)	0	0
Balance at beginning of period	0	0
Balance at end of period	$ 0	$ 0