Stockholders' Equity (Schedule of Changes in Stockholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stockholders' equity, December 31, 2011			$ 4,280
Net earnings	80	181	297	195
Net Income (Loss) Attributable to Parent	74	177	279	185
Net Income (Loss) Attributable to Noncontrolling Interest	6	4	18	10
Other comprehensive income			(95)
Comprehensive Income (Loss)	135	(129)	202	95
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	3	(3)	15	7
Additional paid-in capital			41
Dividends declared on common stock			(124)
Stockholders' equity, September 30, 2012	4,441		4,441
Parent [Member]
Stockholders' equity, December 31, 2011			4,181
Other comprehensive income			(92)
Comprehensive Income (Loss)			187
Common Stock			1
Treasury Stock			41
Additional paid-in capital			41
Dividends declared on common stock			(118)
Stockholders' equity, September 30, 2012	4,333		4,333
Noncontrolling Interest [Member]
Stockholders' equity, December 31, 2011			99
Other comprehensive income			(3)
Common Stock			0
Treasury Stock			0
Additional paid-in capital			0
Dividends declared on common stock			(6)
Stockholders' equity, September 30, 2012	$ 108		$ 108