Acquisition of Businesses Pro Forma Table - Acquisition (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues	$ 836	$ 487	$ 1,376	$ 918
Net Income (Loss) Attributable to Parent	178	137	284	249
Pro Forma [Member]
Revenues	854	746	1,634	1,456
Net Income (Loss) Attributable to Parent	184	223	324	374
International [Member]
Revenues	248		248
International [Member] | Pro Forma [Member]
Revenues			0
Net Income (Loss) Attributable to Parent			$ 0