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Acquisitions and Dispositions - Defenders Acquisition Narrative (Details) - USD ($) $ in Thousands, shares in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
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Jan. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jan. 06, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  | $ 179,372 | $ 76,511 |  |
Issuance of shares for acquisition of business |  |  |  | 113,841 | 0 |  |
Goodwill |  | $ 5,219,361 |  | 5,219,361 |  |  | $ 4,959,658
Merger, restructuring, integration, and other |  | $ 12,038 | $ 6,990 | 120,832 | $ 13,269 |  |
Defenders |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred | $ 290,000 |  |  |  |  |  |
Acquisition of businesses, net of cash acquired | $ 172,000 |  |  |  |  |  |
Shares issued for acquisition (in shares) | 16 |  |  |  |  |  |
Issuance of shares for acquisition of business | $ 114,000 |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 252,619 |
Merger, restructuring, integration, and other |  |  |  | $ 81,000 |  |  |
Customer Relationships | Defenders |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 14 years |  |  |  |  |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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