Preparation Of Interim Financial Statements (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Diluted Earnings Per Share from continuing operations	$ 0.79	$ 0.63	$ 2.03	$ 2.37
Economic life | Fiber Network Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Depreciation Expense	$ (70)		$ (210)
Diluted Earnings Per Share from continuing operations	$ 0.01		$ 0.02
Customer Fulfillment Costs [Member] | Intangible Assets, Amortization Period
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of revenue	$ (80)		$ (335)
Diluted Earnings Per Share from continuing operations	$ 0.01		$ 0.03