Stockholders' Equity (Components of Accumulated Other Comprehensive Income) (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
Unrealized translation - Beginning balance			$ (525)	$ (26)
Cash flow hedge and other - Beginning balance			(34)	(52)
Other comprehensive income/(loss) before reclassifications			155	(576)
(Income)/loss reclassified from AOCI			0	0
Other comprehensive income/(loss) before reclassifications			(15)	34
Income/loss reclassified from AOCI			4	(6)
Unrealized currency translation adjustments	170	(423)	163	(591)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(12)	(36)	(26)	(89)
Unrealized translation - Ending balance	(370)	(602)	(370)	(602)
Cash flow hedge and other - Ending balance	(45)	(24)	(45)	(24)
Other	(7)	11	(11)	28
Pension Plans, Defined Benefit [Member]
Defined benefit and other postretirement benefit plans - Beginning balance			(1,668)	(1,928)
Other comprehensive income/(loss) before reclassifications			(27)	74
(Income)/loss reclassified from AOCI			33	16
Defined benefit and other postretirement benefit plans - Ending balance	(1,662)	(1,838)	(1,662)	(1,838)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined benefit and other postretirement benefit plans - Beginning balance			(15)	(53)
Other comprehensive income/(loss) before reclassifications			20	1
(Income)/loss reclassified from AOCI			0	(3)
Defined benefit and other postretirement benefit plans - Ending balance	5	(55)	5	(55)
Parent [Member]
Unrealized currency translation adjustments			155	(576)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			(26)
Other			(11)	28
Parent [Member] | Pension Plans, Defined Benefit [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			(6)	(90)
Parent [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			$ (20)	$ 2