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Restructuring and Transaction Costs (Schedule Of The Activity And Balances Associated With Restructuring Liabilities) (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost And Reserve [Line Items] |  |
Beginning balance | $ 172 | $ 21
Ending balance | 173 | 18
Merger Integration [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Merger integration | 27 |
Prior years' restructurings [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Restructuring reserve activity | (26) | (3)
Other Current Liabilities [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Beginning balance | 35 | 20
Ending balance | 54 | 17
Other Current Liabilities [Member] | Merger Integration [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Merger integration | 27 |
Other Current Liabilities [Member] | Prior years' restructurings [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Restructuring reserve activity | (8) | (3)
Other Long-Term Liabilities [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Beginning balance | 137 | 1
Ending balance | 119 | $ 1
Other Long-Term Liabilities [Member] | Prior years' restructurings [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Restructuring reserve activity | $ (18) |

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- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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