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		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (15)	$ (90)	$ (21)	$ (77)
Other comprehensive income before reclassifications, net of tax	(4)	(20)	(1)	(38)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	2	5	5	10
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(2)	1	(5)	(3)
Net Other Comprehensive Income	(2)	(15)	4	(28)
Ending Balance	(17)	(105)	(17)	(105)
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	(148)	(215)	(151)	(219)
Other comprehensive income before reclassifications, net of tax	0	(6)	0	(6)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	2	5	5	9
Net Other Comprehensive Income	2	(1)	5	3
Ending Balance	(146)	(216)	(146)	(216)
Foreign Currency Translation Gains Losses [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	133	125	130	143
Other comprehensive income before reclassifications, net of tax	(4)	(14)	(1)	(32)
Amounts reclassified from Accumulated other comprehensive loss, net of tax	0	0	0	0
Net Other Comprehensive Income	(4)	(14)	(1)	(32)
Ending Balance	$ 129	$ 111	$ 129	$ 111