Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Disclosures [Abstract]

Fair value and amortized cost of investments

The fair value and amortized cost of these bonds are as follows:

(Dollars in millions)	September 30, 2011		December 31, 2010
Fair Value	$	153	$	123
Amortized Cost	$	152	$	121

Schedule of investment maturities

These investments have the following maturities:

(Dollars in millions)	September 30, 2011		December 31, 2010
Less than 1 year	$	53	$	44
1 - 2 years (a)	27		45
2 - 5 years (b)	73		31
Greater than 5 years	—		3
Total	$	153	$	123

(a) The 1-2 year category includes callable bonds of approximately $5 million as of year end 2010, which are classified as short-term investments on the consolidated balance sheet. There were no callable bonds in this category as of nine months ended 2011.

(b) The 2-5 year category includes callable bonds of approximately $8 million and $5 million as of nine months ended 2011 and year end 2010, respectively, which are classified as short-term investments on the consolidated balance sheet.

Fair value and carrying value of long-term debt

The fair value and carrying value of the Company's long-term debt is as follows:

(Dollars in millions)	September 30, 2011		December 31, 2010
Long-term Debt Including Current Maturities:
Fair Value	$	10,043	$	9,624
Carrying Value	$	8,654	$	8,664