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SUPPLEMENTAL CASH FLOW & OTHER DATA | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract] |
SUPPLEMENTAL CASH FLOW & OTHER DATA | SUPPLEMENTAL CASH FLOW & OTHER DATA Supplemental cash flow and other data for the years ended December 31, 2017, 2016 and 2015 was as follows:
| 2017 |  | 2016 |  | 2015
Depreciation expense | $ | 196 |  |  | $ | 177 |  |  | $ | 223 |
Amortization expense | 74 |  |  | 72 |  |  | 81 |
Depreciation and amortization expense | $ | 270 |  |  | $ | 249 |  |  | $ | 304 |
Interest expense | $ | (153 | ) |  | $ | (144 | ) |  | $ | (154 | )
Interest income | 2 |  |  | 1 |  |  | 1 |
Interest expense, net | $ | (151 | ) |  | $ | (143 | ) |  | $ | (153 | )
Interest paid | $ | 159 |  |  | $ | 148 |  |  | $ | 172 |
Income taxes paid | $ | 243 |  |  | $ | 361 |  |  | $ | 319 |
Assets acquired under capital leases | $ | 7 |  |  | $ | — |  |  | $ | 3 |
Accounts payable associated with capital expenditures | $ | 26 |  |  | $ | 9 |  |  | $ | 15 |
Dividends payable | $ | 61 |  |  | $ | 62 |  |  | $ | 55 |
Businesses acquired: |  |  |  |  |  |  |
Fair value of assets acquired | $ | 657 |  |  | $ | 139 |  |  | $ | 63 |
Fair value of liabilities assumed | 58 |  |  | — |  |  | — |
Fair value of net assets acquired | 599 |  |  | 139 |  |  | 63 |
Merger consideration paid (payable), net | (6 | ) |  | — |  |  | 4 |
Cash paid for business acquisitions | 593 |  |  | 139 |  |  | 67 |
Less: Cash acquired | 12 |  |  | — |  |  | — |
Business acquisitions, net of cash acquired | $ | 581 |  |  | $ | 139 |  |  | $ | 67 |
The escrow proceeds associated with disposition of business received in 2017 related to the sale of Focus Diagnostics. For further details regarding the sale of Focus Diagnostics, see Note 6.

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -URI http://asc.fasb.org/topic&trid=2134446 + Details
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- References No definition available. + Details
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