Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019		Dec. 31, 2019	Dec. 31, 2018
Asset impairment and exit costs		$ 20
Cash divested from deconsolidation	$ 0	1,346	[1]
Restricted cash	$ 4	5		$ 4	$ 27
Marketing Administration And Research Costs [Member]
Deconsolidation amount		239
Cash [Member]
Cash divested from deconsolidation		1,323
Restricted Cash [Member]
Cash divested from deconsolidation		23
Canada [Member] | Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases [Member] | RBH [Member] | Appellate Ruling [Member] | Smoking And Health Class Actions [Member]
Amount of litigation charge		$ 194

[1] Includes deconsolidation of RBH cash and cash equivalents of $1,323 million and restricted cash of $23 million.