Valuation of Debt and Equity Investments and Certain Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Details of our investments are as follows:


	December 31, 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:
Money market funds	$	886	$	—	$	—	$	1,213	$	—	$	—
Corporate obligations	256		407		—		174		1,216		—
U.S. government agency and Treasury securities	1,340		3,054		—		604		1,734		—
Mutual funds	—		—		18		—		—		272
Total	2,482		3,461		18		1,991		2,950		272

Other measurement basis:
Equity-method investments	—		—		27		—		—		24
Non-marketable equity investments	—		—		4		—		—		4
Cash on hand	625		—		—		446		—		—
Total	$	3,107	$	3,461	$	49	$	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.


	December 31, 2020						December 31, 2019
	Level 1		Level 2		Total		Level 1		Level 2		Total
Assets:
Money market funds	$	886	$	—	$	886	$	1,213	$	—	$	1,213
Corporate obligations	—		663		663		—		1,390		1,390
U.S. government agency and Treasury securities	4,394		—		4,394		2,338		—		2,338
Mutual funds	18		—		18		272		—		272
Total assets	$	5,298	$	663	$	5,961	$	3,823	$	1,390	$	5,213

Liabilities:
Deferred compensation	$	350	$	—	$	350	$	298	$	—	$	298
Total liabilities	$	350	$	—	$	350	$	298	$	—	$	298