Valuation of debt and equity investments and certain liabilities (Tables)

6 Months Ended

Jun. 30, 2014

Details of our investments are as follows:



	June 30, 2014						December 31, 2013
	Cash and Cash Equivalents		Short-term Investments		Long-term Investments		Cash and Cash Equivalents		Short-term Investments		Long-term Investments
Measured at fair value:
Available-for-sale securities
Money market funds	$	408	$	—	$	—	$	500	$	—	$	—
Corporate obligations	80		287		—		123		217		—
U.S. Government agency and Treasury securities	495		1,301		—		787		1,985		—
Trading securities
Mutual funds	—		—		182		—		—		179
Total	983		1,588		182		1,410		2,202		179

Other measurement basis:
Equity-method investments	—		—		24		—		—		24
Cost-method investments	—		—		13		—		—		13
Cash on hand	233		—		—		217		—		—
Total	$	1,216	$	1,588	$	219	$	1,627	$	2,202	$	216

Aggregate maturities of investments in debt securities classified as available-for-sale

The following table presents the aggregate maturities of investments in debt securities classified as available for sale at June 30, 2014:



Due	Fair Value
One year or less	$	2,336
One to two years	235

Assets and liabilities accounted for at fair value

The following are our assets and liabilities that were accounted for at fair value on a recurring basis as of June 30, 2014, and December 31, 2013. For these periods, we had no Level 3 assets or liabilities. These tables do not include cash on hand, assets held by our postretirement plans, or assets and liabilities that are measured at historical cost or any basis other than fair value.



	Fair Value
	June 30, 2014		Level 1		Level 2
Assets:
Money market funds	$	408	$	408	$	—
Corporate obligations	367		—		367
U.S. Government agency and Treasury securities	1,796		1,370		426
Mutual funds	182		182		—
Total assets	$	2,753	$	1,960	$	793

Liabilities:
Deferred compensation	$	199	$	199	$	—
Total liabilities	$	199	$	199	$	—



	Fair Value
	December 31, 2013		Level 1		Level 2
Assets:
Money market funds	$	500	$	500	$	—
Corporate obligations	340		—		340
U.S. Government agency and Treasury securities	2,772		2,107		665
Mutual funds	179		179		—
Total assets	$	3,791	$	2,786	$	1,005

Liabilities:
Deferred compensation	$	197	$	197	$	—
Total liabilities	$	197	$	197	$	—

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

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