Investments in Equity Securities (Investment in JUUL Narrative) (Details) - JUUL [Member] - USD ($) $ in Billions		1 Months Ended
	Dec. 20, 2018	Dec. 31, 2018	Mar. 31, 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%
Equity securities Fv-Ni, ineligible for sale or transfer, period	6 years