Assets and Liabilities Measured at Fair Value (Tables)

9 Months Ended

Sep. 30, 2019

Assets and Liabilities Measured at Fair Value

Schedule of assets and liabilities measured at fair value

	Fair Value Measurements at				Fair Value Measurements at
	September 30, 2019				December 31, 2018
			Quoted			Quoted
			prices			prices
			in active	Significant		in active	Significant
			markets for	other		markets for	other
			identical	observable		identical	observable
			assets	inputs		assets	inputs
Description	Total		(Level 1)	(Level 2)	Total	(Level 1)	(Level 2)
	amounts in millions
Cash equivalents	$	319	319	—	310	310	—
Indemnification asset	$	137	—	137	79	—	79
Debt	$	1,627	—	1,627	1,334	—	1,334

Schedule of Realized and unrealized gains (losses) on financial instruments

	Three months ended			Nine months ended
	September 30,			September 30,
	2019		2018	2019	2018
	amounts in millions
Equity securities	$	1	10	3	154
Exchangeable senior debentures		(49)	(52)	(304)	(9)
Indemnification asset		3	15	58	(49)
Other financial instruments		—	—	4	(4)
	$	(45)	(27)	(239)	92