Contingencies (Other Disputes Under the State Settlement Agreements) (Details) - PM USA [Member] - USD ($) $ in Millions	1 Months Ended			3 Months Ended
	Oct. 31, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2024
Loss Contingencies [Line Items]
Payments for legal settlements			$ 7
Other Disputes Under the State Settlement Agreements [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 31
Other Disputes Under the State Settlement Agreements [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Litigation settlement	$ 10
Cost of Sales [Member]
Loss Contingencies [Line Items]
Payments for legal settlements				$ 5
Interest Expense [Member]
Loss Contingencies [Line Items]
Payments for legal settlements				$ 2