Accumulated Other Comprehensive Losses: (Components of Accumulated Other Comprehensive Losses, Net Of Taxes) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total accumulated other comprehensive losses	$ (6,311)	$ (8,208)	$ (10,631)	$ (9,599)
Currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total accumulated other comprehensive losses	(8,003)	(6,701)	(6,843)
Pension and other benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total accumulated other comprehensive losses	(1,822)	(2,880)	(4,253)
Derivatives accounted for as hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total accumulated other comprehensive losses	266	4	(85)
Total accumulated other comprehensive losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total accumulated other comprehensive losses	$ (9,559)	$ (9,577)	$ (11,181)	$ (9,363)