Income Taxes (Schedule of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax assets:
Accrued postretirement and postemployment benefits	$ 524	$ 491
Settlement charges	888	833
Accrued pension costs	148	131
Investment in JUUL	2,642	2,047
Investment in Cronos	128	197
Net operating losses and tax credit carryforwards	81	92
Total deferred income tax assets	4,411	3,791
Deferred income tax liabilities:
Property, plant and equipment	(273)	(255)
Intangible assets	(2,806)	(2,758)
Investment in ABI	(2,819)	(3,115)
Finance assets, net	(117)	(204)
Other	(12)	(158)
Total deferred income tax liabilities	(6,027)	(6,490)
Valuation allowances	(2,817)	(2,324)	$ (71)	$ 0
Net deferred income tax liabilities	$ (4,433)	$ (5,023)