Divestitures of the Latin American and ILEC Businesses and Planned Divestiture of the EMEA Business - Components of Held for Sale Assets and Liabilities (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations - EMEA Business $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Assets held for sale
Cash and cash equivalents	$ 43
Accounts receivable, less allowance of $5	76
Other current assets	59
Property, plant and equipment, net accumulated depreciation of $1,033	1,873
Goodwill	0
Customer relationships and other intangibles, net	100
Operating lease assets	156
Valuation allowance on assets held for sale	(660)
Deferred tax assets	138
Other non-current assets	38
Total assets held for sale	1,823
Liabilities held for sale
Accounts payable	78
Salaries and benefits	23
Current portion of deferred revenue	28
Current operating lease liabilities	33
Other current liabilities	28
Deferred income taxes	38
Asset retirement obligations	30
Deferred revenue, non-current	85
Operating lease liabilities, non-current	103
Total liabilities held for sale	446
Allowance for doubtful accounts	5
Accumulated depreciation	1,033
Loss on foreign currency translation	$ 365