Equity (Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2013	$ (196)
Other comprehensive income before reclassifications	(324)
Reclassifications from accumulated other comprehensive loss to net earnings	6
Net other comprehensive income	(318)
Balance as of December 31, 2014	(514)
Tax provision of net actuarial loss and prior service cost related to pension and other postretirement benefit plans included in other comprehensive income	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	(106)
Reclassifications from accumulated other comprehensive loss to net earnings
Net other comprehensive income	(106)
Balance as of December 31, 2014	(83)
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	(221)
Reclassifications from accumulated other comprehensive loss to net earnings	6
Net other comprehensive income	(215)
Balance as of December 31, 2014	(431)
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
Net other comprehensive income	3
Balance as of December 31, 2014	$ 0