Equity (Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013			$ (196)
Other comprehensive income before reclassifications			(88)
Reclassifications from accumulated other comprehensive loss to net earnings			3
Net other comprehensive income			(85)
Balance as of September 30, 2014	(281)		(281)
Pension and other postretirement benefit plans, tax	0	(3)	21	3
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013			23
Other comprehensive income before reclassifications			(55)
Reclassifications from accumulated other comprehensive loss to net earnings			0
Net other comprehensive income			(55)
Balance as of September 30, 2014	(32)		(32)
Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013			(216)
Other comprehensive income before reclassifications			(36)
Reclassifications from accumulated other comprehensive loss to net earnings			3
Net other comprehensive income			(33)
Balance as of September 30, 2014	(249)		(249)
Pension and other postretirement benefit plans, tax			2
Unrealized Gain (Loss) on Forward Exchange Contracts
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013			(3)
Other comprehensive income before reclassifications			3
Reclassifications from accumulated other comprehensive loss to net earnings			0
Net other comprehensive income			3
Balance as of September 30, 2014	$ 0		$ 0