Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Property, Plant and Equipment, Estimated Useful Life

Estimated useful lives in years are generally as follows:

Description	Estimated Useful Life
Buildings and improvements	Shorter of 35 years or useful life
Laboratory and manufacturing equipment	4-10
Office and computer equipment	3-7
Leasehold improvements	Shorter of useful life or lease term

Schedule of Effect of New Accounting Pronouncements

The cumulative effect of the changes made to our Consolidated Balance Sheets as of January 1, 2018 for the adoption of Topic 606 was as follows (in millions):

	December 31, 2017		Adjustments Due to Topic 606			January 1, 2018
Prepaid and other current assets	$	1,661	$	96		$	1,757
Other long-term assets	$	2,722	$	10		$	2,732
Other accrued liabilities	$	3,370	$	(115	)	$	3,255
Other long-term obligations	$	558	$	31		$	589
Retained earnings	$	19,012	$	190		$	19,202