XML 75 R54.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Goodwill and Other Intangible Assets - Schedule of Goodwill by Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Goodwill [Roll Forward] |  |
Beginning balance | $ 2,595.9 | $ 2,553.0
Foreign currency translation | (2.1) | 9.9
Ending balance | 4,382.9 | 2,595.9
Corporate |  |
Goodwill [Roll Forward] |  |
Beginning balance | 1,123.6 | 1,090.6
Foreign currency translation | 0.0 | 0.0
Ending balance | 2,024.4 | 1,123.6
Accumulated impairment losses | 1,571.0 |
Small Business |  |
Goodwill [Roll Forward] |  |
Beginning balance | 185.9 | 185.9
Foreign currency translation | 0.0 | 0.0
Ending balance | 266.1 | 185.9
Public |  |
Goodwill [Roll Forward] |  |
Beginning balance | 929.6 | 929.6
Foreign currency translation | 0.0 | 0.0
Ending balance | 1,737.7 | 929.6
Accumulated impairment losses | 354.0 |
Other |  |
Goodwill [Roll Forward] |  |
Beginning balance | 356.8 | 346.9
Foreign currency translation | (2.1) | 9.9
Ending balance | 354.7 | 356.8
Accumulated impairment losses | 28.0 |
IGNW, Inc. |  |
Goodwill [Roll Forward] |  |
Acquisition |  | 33.0
IGNW, Inc. | Corporate |  |
Goodwill [Roll Forward] |  |
Acquisition |  | 33.0
IGNW, Inc. | Small Business |  |
Goodwill [Roll Forward] |  |
Acquisition |  | 0.0
IGNW, Inc. | Public |  |
Goodwill [Roll Forward] |  |
Acquisition |  | 0.0
IGNW, Inc. | Other |  |
Goodwill [Roll Forward] |  |
Acquisition |  | $ 0.0
Amplified IT LLC |  |
Goodwill [Roll Forward] |  |
Acquisition | 133.8 |
Amplified IT LLC | Corporate |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Amplified IT LLC | Small Business |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Amplified IT LLC | Public |  |
Goodwill [Roll Forward] |  |
Acquisition | 133.8 |
Amplified IT LLC | Other |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Focal Point Data Risk LLC |  |
Goodwill [Roll Forward] |  |
Acquisition | 82.7 |
Focal Point Data Risk LLC | Corporate |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Focal Point Data Risk LLC | Small Business |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Focal Point Data Risk LLC | Public |  |
Goodwill [Roll Forward] |  |
Acquisition | 82.7 |
Focal Point Data Risk LLC | Other |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Sirius Computer Solutions, Inc. |  |
Goodwill [Roll Forward] |  |
Acquisition | 1,572.4 |
Sirius Computer Solutions, Inc. | Corporate |  |
Goodwill [Roll Forward] |  |
Acquisition | 900.6 |
Sirius Computer Solutions, Inc. | Small Business |  |
Goodwill [Roll Forward] |  |
Acquisition | 80.2 |
Sirius Computer Solutions, Inc. | Public |  |
Goodwill [Roll Forward] |  |
Acquisition | 591.6 |
Sirius Computer Solutions, Inc. | Other |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Other acquisition adjustments |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.2 |
Other acquisition adjustments | Corporate |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.2 |
Other acquisition adjustments | Small Business |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Other acquisition adjustments | Public |  |
Goodwill [Roll Forward] |  |
Acquisition | 0.0 |
Other acquisition adjustments | Other |  |
Goodwill [Roll Forward] |  |
Acquisition | $ 0.0 |

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cdw_SmallBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cdw_PublicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cdw_IGNWIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cdw_AmplifiedITLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cdw_FocalPointDataRiskLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cdw_SiriusComputerSolutionsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cdw_OtherAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |