Equity (Accumulated Other Comprehensive Loss) (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
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013			$ (196)
Other comprehensive income before reclassifications			(21)
Reclassifications from accumulated other comprehensive loss to net earnings			3
Net other comprehensive income			(18)
Balance as of June 30, 2014	(214)		(214)
Pension and other postretirement benefit plans, tax	22	9	21	6
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			12
Reclassifications from accumulated other comprehensive loss to net earnings			0
Net other comprehensive income			12
Balance as of June 30, 2014	35		35
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 June 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 June 30, 2014	$ 0		$ 0