Marketable Securities

The following table summarizes the fair value of cash equivalents and marketable securities which approximates cost:



	Fair Value Level	December 31, 2016		December 31, 2015
Cash and cash equivalents
Cash, cash equivalents and time deposits		$	6,077	$	7,730
Available-for-sale securities
U.S. government and agencies	2	1,158		—
Corporate debt	2	2,524		4,071
Money market funds	1	1,802		2,275
Sovereign debt	2	1,399		1,162
Total available-for-sale securities – cash equivalents		6,883		7,508
Total cash and cash equivalents		$	12,960	$	15,238
Marketable securities
Available-for-sale securities
U.S. government and agencies	2	$	5,886	$	5,329
Corporate debt	2	3,611		2,196
Mortgage and asset-backed	2	197		—
Sovereign debt	2	2,147		57
Total available-for-sale securities – marketable securities		11,841		7,582
Trading securities – sovereign debt	2	—		581
Total marketable securities		$	11,841	$	8,163
Restricted cash
Cash, cash equivalents and time deposits		$	531	$	833
Available-for-sale securities, primarily money market funds	1	1,687		1,340
Total restricted cash		$	2,218	$	2,173

Available-for-sale securities included above with contractual maturities (excluding mortgage and asset-backed securities)
Due in one year or less		$	10,957
Due between one and five years		5,786
Total available-for-sale securities with contractual maturities		$	16,743

Sales proceeds from investments classified as available-for-sale and sold prior to maturity were $8.5 billion, $7.9 billion and $5.9 billion in the years ended December 31, 2016, 2015 and 2014. Net unrealized gains and losses on trading securities were insignificant in the years ended December 31, 2016, 2015 and 2014.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same amounts shown in the consolidated statements of cash flows:



	December 31, 2016		December 31, 2015
Cash and cash equivalents	$	12,960	$	15,238
Restricted cash included in Other current assets	1,613		1,529
Restricted cash included in Other assets	587		565
Total cash, cash equivalents and restricted cash as shown in the consolidated statements of cash flows	$	15,160	$	17,332