Income Taxes (Reconciliation of Effective Tax Rate and U.S. Federal Statutory Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
$
U.S. federal statutory rate	$ 1,447	$ 161	$ 1,962
State and local income taxes, net of federal tax benefit	410	356	377
Tax basis in foreign investments	23	84	140
Deemed repatriation tax	0	0	14
Uncertain tax positions	9	(40)	8
Other	6	(29)	(38)
Total provision for income taxes	$ 2,436	$ 2,064	$ 2,374
%
U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal tax benefit	6.00%	46.50%	4.00%
Tax basis in foreign investments	0.30%	11.00%	1.50%
Deemed repatriation tax	0.00%	0.00%	0.10%
Uncertain tax positions	0.10%	(5.20%)	0.10%
Other	0.10%	(3.80%)	(0.40%)
Effective tax rate	35.40%	269.50%	25.40%
Effective income tax rate reconciliation, deferred profit sharing dividends		$ 21
ABI [Member]
$
Investment in ABI	$ (16)	$ (210)	$ (104)
%
Investment in ABI	(0.20%)	(27.40%)	(1.10%)
JUUL [Member]
$
Investment	$ 537	$ 1,808	$ 15
Total provision for income taxes	$ 612
%
Investment	7.80%	236.00%	0.20%
Cronos [Member]
$
Investment	$ 20	$ (66)	$ 0
%
Investment	0.30%	(8.60%)	0.00%