Fair Value (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

	December 31, 2018		Level 1		Level 2		Level 3
Investments in equity securities	$	137	$	137	$	-	$	-
Available-for-sale securities		93		-		93		-
Trading securities		11		-		11		-
Fair value of interest rate swap agreements		3		-		3		-
Total assets	$	244	$	137	$	107	$	-
Contingent Value Right (CVR)	$	-	$	-	$	-	$	-
Fair value of interest rate swap agreements		2		-		2		-
Total liabilities	$	2	$	-	$	2	$	-
	December 31, 2017		Level 1		Level 2		Level 3
Available-for-sale securities	$	252	$	132	$	120	$	-
Trading securities		37		37		-		-
Fair value of interest rate swap agreements		1		-		1		-
Total assets	$	290	$	169	$	121	$	-
Contingent Value Right (CVR)	$	2	$	2	$	-	$	-
CVR-related liability		256		-		-		256
Fair value of interest rate swap agreements		18		-		18		-
Total liabilities	$	276	$	2	$	18	$	256

Available-for-sale Securities

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Values
As of December 31, 2018:
Debt securities
Government	$	54	$	-	$	(3)	$	51
Corporate		34		-		(2)		32
Mortgage and asset-backed securities		10		-		-		10
Totals	$	98	$	-	$	(5)	$	93

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Values
As of December 31, 2017:
Debt securities and debt-based mutual funds
Government and corporate	$	189	$	-	$	(4)	$	185
Equity securities and equity-based mutual funds
Domestic		51		10		-		61
International		5		1		-		6
Totals	$	245	$	11	$	(4)	$	252

Contractual Maturities of Debt Securities

	December 31, 2018				December 31, 2017
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Values		Cost		Fair Values
Within 1 year	$	14	$	14	$	4	$	4
After 1 year and through year 5		20		19		46		46
After 5 years and through year 10		25		24		32		31
After 10 years		39		36		41		40

Gross Realized Gains and Losses and Investment Income on Available-for-sale Securities

	Year Ended December 31,
	2018		2017		2016
Realized gains	$	-	$	3	$	28
Realized losses		-		(2)		(6)

Net Gains and Losses Recognized for Investments in Equity Securities

	Year Ended
	December 31,
	2018
Net gains and (losses) recognized during the year on equity securities	$	(7)
Less: Net gains and (losses) recognized during
the year on equity securities sold during the year		1
Unrealized gains and (losses) recognized during the
year on equity securities held at December 31, 2018	$	(8)