XML 64 R38.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Schedule II - Valuation and Qualifying Accounts (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract] |
Allowance for Doubtful Accounts |
| Balance at Beginning |  | Charged to |  | Charged to Other |  |  |  | Balance at
| of Period |  | Expense |  | Accounts(1) |  | Deductions(2) |  | End of Period
Allowance for doubtful accounts | (In thousands)
Year ended December 31, 2017 | $ | 22,007 |  |  | 8,466 |  |  | — |  |  | (9,160 | ) |  | $ | 21,313 |
Year ended December 31, 2016 | 22,587 |  |  | 5,888 |  |  | 21 |  |  | (6,489 | ) |  | 22,007 |
Year ended December 31, 2015 | 21,084 |  |  | 6,099 |  |  | 1,305 |  |  | (5,901 | ) |  | 22,587 |
_________________________
(1) | Represents allowance for doubtful accounts in connection with certain acquisitions and divestitures.
(2) | Includes a reduction in the allowance for doubtful accounts due to write-off of accounts receivable.

X
- References No definition available. + Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allowance for Doubtful Accounts [Table Text Block] + References No definition available. + Details
Name: | wcc_AllowanceForDoubtfulAccountsTableTextBlock
Namespace Prefix: | wcc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration