Investments in Equity Securities (Investment in JUUL Narrative) (Details) - JUUL [Member] - USD ($) $ in Billions	1 Months Ended
	Dec. 31, 2018	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity securities Fv-Ni	$ 12.8
Equity securities Fv Ni, ownership percentage	35.00%	35.00%
Equity securities Fv-Ni, ownership percentage upon conversion		35.00%
Equity securities Fv-Ni, threshold for downward adjustment of board election		30.00%