Income Taxes (Schedule of Earnings (Loss) from Continuing Operations Before Tax by Jurisdiction) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
US		$ 231	$ 534	$ 806
International	[1]	257	407	803
Earnings (loss) from continuing operations before tax		$ 488	$ 941	$ 1,609
Effective income tax rate		41.00%	33.00%	32.00%
Aggregated Geographical [Member]
Income Taxes [Line Items]
International		$ 330	$ 308	$ 275
Effective income tax rate		6.10%	4.80%	4.00%

[1] Includes aggregate earnings generated by operations in Bermuda, Luxembourg, the Netherlands and Hong Kong of $330 million, $308 million and $275 million for the years ended December 31, 2015, 2014 and 2013, respectively, which have an aggregate effective income tax rate of 6.1%, 4.8% and 4.0% for each year, respectively.