Contingencies (Non-Engle Progeny Litigation) (Details) - USD ($)	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Feb. 28, 2021	May 31, 2020	Feb. 29, 2020	Sep. 30, 2019	Aug. 31, 2019
Loss Contingencies [Line Items]
Loss contingency accrual, provision				$ 90,000,000
Non-Engle Progeny Smoking And Health Case, Principe [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded							$ 11,000,000
Punitive damages awarded							$ 0
Non-Engle Progeny Smoking and Health Case, Greene [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded					$ 2,300,000	$ 30,000,000		$ 10,000,000
Non-Engle Progeny Smoking and Health Case, Laramie [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									$ 11,000,000
Punitive damages awarded									$ 10,000,000
Damages awarded, value		$ 21,000,000
Loss contingency accrual, provision	$ 30,300,000		$ 27,100,000