Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets and Financial Liabilities

Investments

(In millions)	Balance		Level 1		Level 2		Level 3
December 31, 2014
Assets:
Equity securities	$	15	$	15	$	—	$	—
Government bonds	70		—		70		—
Total assets at fair value	$	85	$	15	$	70	$	—
December 31, 2013
Assets:
Equity securities	$	20	$	20	$	—	$	—
Government bonds	72		—		72		—
Total assets at fair value	$	92	$	20	$	72	$	—

Derivative Instruments, Gain (Loss) [Table Text Block]

Effect of Derivative Instruments on Net Loss

(In millions)		Years Ended December 31,
	Location of Amount Recognized in Net Loss	2014		2013		2012
Derivatives not designated as accounting hedges
Net periodic cash settlements and accrued interest (1)	Interest expense	$	177	$	172	$	170
Total expense for derivatives	Interest expense	17		34		140
Derivatives designated as accounting hedges
Amounts reclassified from AOCL	Interest expense	—		4		28

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⁽¹⁾  The derivative settlements under the terms of the interest rate swap agreements are recognized as interest expense and are paid monthly.