Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Estimated Fair Value

(In millions)	Balance		Level 1		Level 2		Level 3
June 30, 2018
Assets
Government bonds	$	19	$	—	$	19	$	—
Derivative instruments - interest rate swaps	18		—		18		—
Total assets at fair value	$	37	$	—	$	37	$	—
Liabilities
Derivative instruments - interest rate swaps	$	1	$	—	$	1	$	—
Derivative instruments - CEC Convertible Notes	831		—		—		831
Disputed claims liability	86		—		—		86
Total liabilities at fair value	$	918	$	—	$	1	$	917

December 31, 2017
Assets
Equity securities	$	8	$	8	$	—	$	—
Government bonds	25		—		25		—
Total assets at fair value	$	33	$	8	$	25	$	—
Liabilities
Derivative instruments - CEC Convertible Notes	$	1,016	$	—	$	—	$	1,016
Disputed claims liability	112		—		—		112
Total liabilities at fair value	$	1,128	$	—	$	—	$	1,128

Changes in Level 3 Fair Value Measurements

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
(In millions)	Derivative Instruments			Disputed Claims Liability			Derivative Instruments			Disputed Claims Liability
Balance as of beginning of period	$	856		$	102		$	1,016		$	112
Change in fair value recorded in Restructuring and support expenses and other	(25		)	(1		)	(185		)	(9		)
Change due to resolved claims in Disputed claims liability	—			(15		)	—			(17		)
Balance as of end of period	$	831		$	86		$	831		$	86

The major terms of the interest rate swap agreements as of June 30, 2018 are as follows:



Effective Date	Notional Amount (In millions)	Fixed Rate Paid	Variable Rate Received as of June 30, 2018	Maturity Date
12/31/2018	250	2.274%	N/A	12/31/2022
12/31/2018	200	2.828%	N/A	12/31/2022
12/31/2018	600	2.739%	N/A	12/31/2022
1/1/2019	250	2.153%	N/A	12/31/2020
1/1/2019	250	2.196%	N/A	12/31/2021
1/1/2019	400	2.788%	N/A	12/31/2021
1/1/2019	200	2.828%	N/A	12/31/2022
1/2/2019	250	2.172%	N/A	12/31/2020
1/2/2019	200	2.731%	N/A	12/31/2020
1/2/2019	400	2.707%	N/A	12/31/2021