Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Investments All Other Investments [Abstract]

Schedule of Cash, Cash Equivalents and Marketable Securities

The following tables show our cash and available-for-sale securities’ amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short and long-term marketable securities as of December 31, 2016 and December 31, 2015 (in millions):

	December 31, 2016
									Cash and		Short-Term		Long-Term
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
	Cost		Gains		Losses		Value		Equivalents		Securities		Securities
Cash	$	595	$	—	$	—	$	595	$	595	$	—	$	—
Level 1:
Money market funds		17		—		—		17		17		—		—
Level 2:
U.S. agency securities		23		—		—		23		—		21		2
U.S. treasury securities		8		—		—		8		—		8		—
Certificates of deposit		16		—		—		16		—		15		1
Commercial paper		5		—		—		5		—		5		—
Corporate debt securities		82		—		—		82		—		69		13
Subtotal		134		—		—		134		—		118		16
Total	$	746	$	—	$	—	$	746	$	612	$	118	$	16

	December 31, 2015
									Cash and		Short-Term		Long-Term
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
	Cost		Gains		Losses		Value		Equivalents		Securities		Securities
Cash	$	598	$	—	$	—	$	598	$	598	$	—	$	—
Level 1:
Money market funds		11		—		—		11		11		—		—
Level 2:
U.S. agency securities		13		—		—		13		—		9		4
U.S. treasury securities		16		—		—		16		4		12		—
Certificates of deposit		5		—		—		5		—		4		1
Commercial paper		1		—		—		1		—		1		—
Corporate debt securities		54		—		—		54		1		21		32
Subtotal		89		—		—		89		5		47		37
Total	$	698	$	—	$	—	$	698	$	614	$	47	$	37

Fair Value and Notional Principal Amounts of Outstanding or Unsettled Derivative Instruments

The following table shows the notional principal amounts of our outstanding derivative instruments that are not designated as hedging instruments for the periods presented:

	December 31, 2016		December 31, 2015
	(in millions)
Foreign currency exchange-forward contracts (1)(2)	$	6	$	25

(1) Derivative contracts address foreign currency exchange fluctuations for the Euro versus the U.S. dollar. The Company was entered into two outstanding derivative contracts as of December 31, 2016.

(2) The fair value of our derivatives are not material for all periods presented and are reported as assets in prepaid expenses and other current assets on our consolidated balance sheets. We measure the fair value of our outstanding or unsettled derivatives using Level 2 fair value inputs, as we use a pricing model that takes into account the contract terms as well as current foreign currency exchange rates in active markets.