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SUPPLEMENTAL CASH FLOW & OTHER DATA (Tables) | 9 Months Ended
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Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow and Other Data | Supplemental cash flow and other data for the three and nine months ended September 30, 2018 and 2017 was as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Depreciation expense | $ | 55 |  |  | $ | 50 |  |  | $ | 162 |  |  | $ | 143 |
Amortization expense | 22 |  |  | 19 |  |  | 66 |  |  | 54 |
Depreciation and amortization expense | $ | 77 |  |  | $ | 69 |  |  | $ | 228 |  |  | $ | 197 |
Interest expense | $ | (42 | ) |  | $ | (39 | ) |  | $ | (126 | ) |  | $ | (114 | )
Interest income | 1 |  |  | 1 |  |  | 2 |  |  | 2 |
Interest expense, net | $ | (41 | ) |  | $ | (38 | ) |  | $ | (124 | ) |  | $ | (112 | )
Interest paid | $ | 28 |  |  | $ | 27 |  |  | $ | 114 |  |  | $ | 104 |
Income taxes paid | $ | 29 |  |  | $ | 64 |  |  | $ | 70 |  |  | $ | 177 |
Assets acquired under capital leases | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |
Accounts payable associated with capital expenditures | $ | 13 |  |  | $ | 14 |  |  | $ | 13 |  |  | $ | 14 |
Accounts payable associated with purchases of treasury stock | $ | — |  |  | $ | 15 |  |  | $ | — |  |  | $ | 15 |
Dividends payable | $ | 68 |  |  | $ | 62 |  |  | $ | 68 |  |  | $ | 62 |
Businesses acquired: |  |  |  |  |  |  |  |  |  |  |
Fair value of assets acquired | $ | 59 |  |  | $ | 229 |  |  | $ | 242 |  |  | $ | 343 |
Fair value of liabilities assumed | — |  |  | 40 |  |  | 1 |  |  | 40 |
Fair value of net assets acquired | 59 |  |  | 189 |  |  | 241 |  |  | 303 |
Merger consideration paid (payable), net | (5 | ) |  | (2 | ) |  | (17 | ) |  | (4 | )
Cash paid for business acquisitions | 54 |  |  | 187 |  |  | 224 |  |  | 299 |
Less: Cash acquired | — |  |  | — |  |  | 5 |  |  | — |
Business acquisitions, net of cash acquired | $ | 54 |  |  | $ | 187 |  |  | $ | 219 |  |  | $ | 299 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration