Stockholders' Equity (Components of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Unrealized translation - Beginning balance			$ (26)	$ (221)
Cash flow hedge and other - Beginning balance			(52)	(36)
Other comprehensive income/(loss) before reclassifications			(576)	(11)
(Income)/loss reclassified from AOCI			0	0
Other comprehensive income/(loss) before reclassifications			34	(4)
Income/loss reclassified from AOCI			(6)	4
Unrealized currency translation adjustments	(423)	(269)	(591)	(8)
Employee postretirement benefits	36	(8)	89	8
Unrealized translation - Ending balance	(602)	(232)	(602)	(232)
Cash flow hedge and other - Ending balance	(24)	(36)	(24)	(36)
Other	11	12	28	0
Pension Plans, Defined Benefit [Member]
Defined benefit and other postretirement benefit plans - Beginning balance			(1,928)	(1,578)
Other comprehensive income/(loss) before reclassifications			74	(29)
(Income)/loss reclassified from AOCI			16	43
Defined benefit and other postretirement benefit plans - Ending balance	(1,838)	(1,564)	(1,838)	(1,564)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined benefit and other postretirement benefit plans - Beginning balance			(53)	(31)
Other comprehensive income/(loss) before reclassifications			1	(6)
(Income)/loss reclassified from AOCI			(3)	(1)
Defined benefit and other postretirement benefit plans - Ending balance	(55)	(38)	(55)	(38)
Parent [Member]
Unrealized currency translation adjustments			(576)	(11)
Employee postretirement benefits			88
Other			28	0
Parent [Member] | Pension Plans, Defined Benefit [Member]
Employee postretirement benefits			90	14
Parent [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Employee postretirement benefits			$ (2)	$ (7)