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

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Investments

Details of our investments are as follows:

	September 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	$	911	$	—	$	—	$	1,213	$	—	$	—
Corporate obligations	341		256		—		174		1,216		—
U.S. government agency and Treasury securities	1,047		2,440		—		604		1,734		—
Trading securities:
Mutual funds	—		—		16		—		—		272
Total	2,299		2,696		16		1,991		2,950		272
Other measurement basis:
Equity-method investments	—		—		27		—		—		24
Non-marketable equity investments	—		—		4		—		—		4
Cash on hand	523		—		—		446		—		—
Total	$	2,822	$	2,696	$	47	$	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.

	September 30, 2020						December 31, 2019
	Level 1		Level 2		Total		Level 1		Level 2		Total
Assets:
Money market funds	$	911	$	—	$	911	$	1,213	$	—	$	1,213
Corporate obligations	—		597		597		—		1,390		1,390
U.S. government agency and Treasury securities	3,487		—		3,487		2,338		—		2,338
Mutual funds	16		—		16		272		—		272
Total assets	$	4,414	$	597	$	5,011	$	3,823	$	1,390	$	5,213
Liabilities:
Deferred compensation	$	314	$	—	$	314	$	298	$	—	$	298
Total liabilities	$	314	$	—	$	314	$	298	$	—	$	298