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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure | SCHEDULE II AMGEN INC. VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2017, 2016 and 2015 (In millions)
Allowance for doubtful accounts |  | Balance at beginning of period |  | Additions charged to costs and expenses |  | Other additions |  | Deductions |  | Balance at end of period
Year ended December 31, 2017 |  | $ | 51 |  |  | $ | 4 |  |  | $ | — |  |  | $ | 4 |  |  | $ | 51 |
Year ended December 31, 2016 |  | $ | 55 |  |  | $ | 11 |  |  | $ | — |  |  | $ | 15 |  |  | $ | 51 |
Year ended December 31, 2015 |  | $ | 50 |  |  | $ | 18 |  |  | $ | — |  |  | $ | 13 |  |  | $ | 55 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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