Changes in Accumulated Other Comprehensive Income Level 4 (Details) - Summary of Changes in Accumulated Other Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (17)	$ (105)	$ (21)	$ (77)
Other comprehensive income before reclassifications, net of tax	(40)	24	(41)	(14)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	1	4	6	14
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(1)	(4)	(6)	(7)
Net Other Comprehensive Income	(39)	28	(35)	0
Ending Balance	(56)	(77)	(56)	(77)
Gains and Losses on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance				(1)
Other comprehensive income before reclassifications, net of tax				0
Amounts reclassified from Accumulated other comprehensive loss, net of tax				1
Net Other Comprehensive Income				1
Ending Balance		0		0
Defined Benefit Pension Items [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(146)	(216)	(151)	(219)
Other comprehensive income before reclassifications, net of tax	0	0	0	(6)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	1	4	6	13
Net Other Comprehensive Income	1	4	6	7
Ending Balance	(145)	(212)	(145)	(212)
Foreign Currency Translation Gains Losses [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	129	111	130	143
Other comprehensive income before reclassifications, net of tax	(40)	24	(41)	(8)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	0	0	0	0
Net Other Comprehensive Income	(40)	24	(41)	(8)
Ending Balance	$ 89	$ 135	$ 89	$ 135