War in Ukraine: Pretax Charges (Details) - War In Ukraine - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	$ 53	$ 151
Cost of sales
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	15	62
Marketing, administration and research costs
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	38	89
Ukraine
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	53	78
Ukraine | Cost of sales
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	15	42
Ukraine | Marketing, administration and research costs
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	38	36
Russia
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	0	73
Russia | Cost of sales
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	0	20
Russia | Marketing, administration and research costs
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax charge related to conflict in Ukraine	$ 0	$ 53