Cash, Cash Equivalents, and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following table categorizes the fair values of cash, cash equivalents, and marketable securities measured at fair value on a recurring basis on our balance sheet (in millions):



	Fair Value Level	December 31, 2017		March 31, 2018
Cash and cash equivalents
U.S. government	1	$	—	$	44
U.S. government and agencies	2	300		50
Non-U.S. government and agencies	2	703		556
Corporate debt	2	25		274
Total marketable securities classified as cash equivalents		1,028		924
Cash, time deposits and money market funds		8,530		7,842
Total cash and cash equivalents		$	9,558	$	8,766

Marketable Securities
U.S. government	1	$	966	$	1,116
U.S. government and agencies	2	384		265
Non-U.S. government and agencies	2	660		1,517
Corporate debt	2	848		680
Other marketable securities	2	23		130
Total marketable securities		$	2,881	$	3,708

Schedule of cash, cash equivalents and restricted cash [Table Text Block]

Cash, cash equivalents, and restricted cash as reported in the statement of cash flows are presented separately on our consolidated balance sheet as follows (in millions):



	December 31, 2017		March 31, 2018
Cash and cash equivalents	$	9,558	$	8,766
Restricted cash included in other assets	124		148
Total cash, cash equivalents, and restricted cash	$	9,682	$	8,914