Equity - Accumulated Other Comprehensive Loss (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2014	$ (514)
Other comprehensive income before reclassifications	(98)
Reclassifications from accumulated other comprehensive loss to net earnings	12
Net other comprehensive income	(86)
Balance as of December 31, 2015	(600)
Tax provision of net actuarial loss and prior service cost related to pension and other postretirement benefit plans included in other comprehensive income	7
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2014	(83)
Other comprehensive income before reclassifications	$ (110)
Reclassifications from accumulated other comprehensive loss to net earnings
Net other comprehensive income	$ (110)
Balance as of December 31, 2015	(193)
Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2014	(431)
Other comprehensive income before reclassifications	13
Reclassifications from accumulated other comprehensive loss to net earnings	12
Net other comprehensive income	25
Balance as of December 31, 2015	(406)
Unrealized Gain (Loss) on Forward Exchange Contracts
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance as of December 31, 2014	0
Other comprehensive income before reclassifications	$ (1)
Reclassifications from accumulated other comprehensive loss to net earnings
Net other comprehensive income	$ (1)
Balance as of December 31, 2015	$ (1)