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Schedule II: Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

GILEAD SCIENCES, INC.

Schedule II: Valuation and Qualifying Accounts

(in millions)



		Balance at Beginning of Period				Additions/Charged to Expense				Deductions				Balance at End of Period
Year ended December 31, 2017:
Accounts receivable allowances⁽¹⁾		$	763			$	7,682			$	7,990			$	455
Sales return allowance		$	195			$	23			$	56			$	162
Valuation allowances for deferred tax assets ⁽²⁾		$	126			$	72			$	36			$	162
Year ended December 31, 2016:
Accounts receivable allowances ⁽¹⁾		$	1,032			$	9,287			$	9,556			$	763
Sales return allowance		$	371			$	(141	)		$	35			$	195
Valuation allowances for deferred tax assets⁽²⁾		$	6			$	120			$	—			$	126
Year ended December 31, 2015:
Accounts receivable allowances ⁽¹⁾		$	356			$	6,934			$	6,258			$	1,032
Sales return allowance		$	171			$	219			$	19			$	371
Valuation allowances for deferred tax assets ⁽²⁾		$	9			$	—			$	3			$	6
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Notes:
⁽¹⁾	Allowances are for doubtful accounts, cash discounts and chargebacks.
⁽²⁾	Valuation allowances for deferred tax assets include $48 million, $4 million and $4 million as of December 31, 2017, 2016 and 2015, respectively, related to our acquisitions.