Investments in Equity Securities (Investment in JUUL Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Equity Method Investments [Line Items]
Impairment of JUUL equity securities		$ 4,500	$ 0	$ 4,500	$ 0
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity securities	$ 12,800
Equity securities, ownership percentage	35.00%	35.00%		35.00%
Equity securities, ownership percentage upon conversion		35.00%		35.00%
Equity securities, threshold for downward adjustment of board election		30.00%		30.00%
Equity securities without readily determinable fair value, fair value disclosure		$ 8,300		$ 8,300
Equity securities without readily determinable fair value, quantitative assessment adjustment, annual amount	$ 12,800
Equity securities without readily determinable fair value, quantitative assessment adjustment, percent				35.00%
Impairment of JUUL equity securities		$ 4,500