Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets Measured at Fair Value
	2017		2016
Cash and cash equivalents	$	2,542	$	3,316
Trading marketable securities	121		94
Level 1 - Assets	$	2,663	$	3,410
Available-for-sale marketable securities:
Corporate and asset-backed debt securities	$	125	$	25
Foreign government debt securities	2		—
United States agency debt securities	27		9
United States treasury debt securities	70		16
Certificates of deposit	27		18
Total available-for-sale marketable securities	$	251	$	68
Foreign currency exchange forward contracts	15		45
Interest rate swap asset	49		57
Level 2 - Assets	$	315	$	170
Total assets measured at fair value	$	2,978	$	3,580

Liabilities Measured at Fair Value
	2017			2016
Deferred compensation arrangements	$	121		$	94
Level 1 - Liabilities	$	121		$	94
Foreign currency exchange forward contracts	$	37		$	18
Level 2 - Liabilities	$	37		$	18
Contingent consideration:
Beginning	$	86		$	56
Additions	3			49
Change in estimate	2			(7		)
Settlements	(59		)	(12		)
Ending	$	32		$	86
Level 3 - Liabilities	$	32		$	86
Total liabilities measured at fair value	$	190		$	198

Available-for-sale Securities

Fair Value of Available for Sale Securities by Maturity
	2017		2016
Due in one year or less	$	107	$	36
Due after one year through three years	$	144	$	32

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

Securities in a Continuous Unrealized Loss Position
	Number of Investments	Fair Value
Corporate and Asset-Backed	118	$	108
Foreign government	1	2
United States Agency	15	20
United States Treasury	20	70
Certificate of Deposit	28	23
Total	182	$	223