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SUPPLEMENTAL CASH FLOW & OTHER DATA (Tables) | 6 Months Ended
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Jun. 30, 2018
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow and Other Data | Supplemental cash flow and other data for the three and six months ended June 30, 2018 and 2017 was as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Depreciation expense | $ | 55 |  |  | $ | 48 |  |  | $ | 107 |  |  | $ | 93 |
Amortization expense | 22 |  |  | 18 |  |  | 44 |  |  | 35 |
Depreciation and amortization expense | $ | 77 |  |  | $ | 66 |  |  | $ | 151 |  |  | $ | 128 |
Interest expense | $ | (43 | ) |  | $ | (38 | ) |  | $ | (84 | ) |  | $ | (75 | )
Interest income | 1 |  |  | — |  |  | 1 |  |  | 1 |
Interest expense, net | $ | (42 | ) |  | $ | (38 | ) |  | $ | (83 | ) |  | $ | (74 | )
Interest paid | $ | 37 |  |  | $ | 31 |  |  | $ | 86 |  |  | $ | 77 |
Income taxes paid | $ | 39 |  |  | $ | 105 |  |  | $ | 41 |  |  | $ | 113 |
Assets acquired under capital leases | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |
Accounts payable associated with capital expenditures | $ | 13 |  |  | $ | 13 |  |  | $ | 13 |  |  | $ | 13 |
Dividends payable | $ | 69 |  |  | $ | 62 |  |  | $ | 69 |  |  | $ | 62 |
Businesses acquired: |  |  |  |  |  |  |  |  |  |  |
Fair value of assets acquired | $ | 35 |  |  | $ | 113 |  |  | $ | 183 |  |  | $ | 114 |
Fair value of liabilities assumed | — |  |  | — |  |  | (1 | ) |  | — |
Fair value of net assets acquired | 35 |  |  | 113 |  |  | 182 |  |  | 114 |
Merger consideration paid (payable), net | — |  |  | (2 | ) |  | (12 | ) |  | (2 | )
Cash paid for business acquisitions | 35 |  |  | 111 |  |  | 170 |  |  | 112 |
Less: Cash acquired | — |  |  | — |  |  | 5 |  |  | — |
Business acquisitions, net of cash acquired | $ | 35 |  |  | $ | 111 |  |  | $ | 165 |  |  | $ | 112 |

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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_
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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