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

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Investments

Details of our investments are as follows:

	June 30, 2020						December 31, 2019
	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 debt securities:
Money market funds	$	2,827	$	—	$	—	$	1,213	$	—	$	—
Corporate obligations	99		216		—		174		1,216		—
U.S. government agency and Treasury securities	900		450		—		604		1,734		—
Trading securities:
Mutual funds	—		—		16		—		—		272
Total	3,826		666		16		1,991		2,950		272
Other measurement basis:
Equity-method investments	—		—		16		—		—		24
Non-marketable equity investments	—		—		4		—		—		4
Cash on hand	468		—		—		446		—		—
Total	$	4,294	$	666	$	36	$	2,437	$	2,950	$	300

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. 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.

	June 30, 2020						December 31, 2019
	Level 1		Level 2		Total		Level 1		Level 2		Total
Assets:
Money market funds	$	2,827	$	—	$	2,827	$	1,213	$	—	$	1,213
Corporate obligations	—		315		315		—		1,390		1,390
U.S. government agency and Treasury securities	1,350		—		1,350		2,338		—		2,338
Mutual funds	16		—		16		272		—		272
Total assets	$	4,193	$	315	$	4,508	$	3,823	$	1,390	$	5,213
Liabilities:
Deferred compensation	$	286	$	—	$	286	$	298	$	—	$	298
Total liabilities	$	286	$	—	$	286	$	298	$	—	$	298