Segment Reporting (Other Expenses By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Depreciation expense	$ 902	$ 908	$ 898
Capital expenditures	748	602	852
Operating Segments | European Union
Segment Reporting Information [Line Items]
Depreciation expense	307	266	254
Capital expenditures	470	384	466
Operating Segments | Eastern Europe
Segment Reporting Information [Line Items]
Depreciation expense	131	173	147
Capital expenditures	71	88	132
Operating Segments | Middle East & Africa
Segment Reporting Information [Line Items]
Depreciation expense	89	75	90
Capital expenditures	37	22	35
Operating Segments | South & Southeast Asia
Segment Reporting Information [Line Items]
Depreciation expense	143	137	142
Capital expenditures	52	57	100
Operating Segments | East Asia & Australia
Segment Reporting Information [Line Items]
Depreciation expense	154	188	185
Capital expenditures	36	13	67
Operating Segments | Americas
Segment Reporting Information [Line Items]
Depreciation expense	62	69	80
Capital expenditures	54	38	52
Operating Segments | Other
Segment Reporting Information [Line Items]
Depreciation expense	16	0	0
Capital expenditures	$ 28	$ 0	$ 0