Significant Accounting Policies (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	$ (137)		$ (136)
Other Comprehensive Income Before Reclassifications	2		(1)
Amounts Reclassified From Accumulated Other Comprehensive Income	1		3
Other Comprehensive Income (Loss), Net of Tax	3	1	2	3
Accumulated Other Comprehensive Income (Loss)	(134)		(134)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	(4)		(4)
Other Comprehensive Income Before Reclassifications	0		0
Amounts Reclassified From Accumulated Other Comprehensive Income	0		0
Other Comprehensive Income (Loss), Net of Tax	0		0
Accumulated Other Comprehensive Income (Loss)	(4)		(4)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	(6)		(6)
Other Comprehensive Income Before Reclassifications	1		1
Amounts Reclassified From Accumulated Other Comprehensive Income	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	1		1
Accumulated Other Comprehensive Income (Loss)	(5)		(5)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	(126)		(126)
Other Comprehensive Income Before Reclassifications	0		(2)
Amounts Reclassified From Accumulated Other Comprehensive Income	1		3
Other Comprehensive Income (Loss), Net of Tax	1		1
Accumulated Other Comprehensive Income (Loss)	(125)		(125)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	(1)		0
Other Comprehensive Income Before Reclassifications	1		0
Amounts Reclassified From Accumulated Other Comprehensive Income	0		0
Other Comprehensive Income (Loss), Net of Tax	1		0
Accumulated Other Comprehensive Income (Loss)	$ 0		$ 0