Income Taxes - Effective Tax Rates (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Consolidated effective tax rate	36.60%
Accumulated permanently reinvested foreign earnings	$ 1,800,000,000
Cumulative unrecognized deferred tax liabilities	218,000,000
Internal Revenue Service (IRS) [Member] | Tax Years 2009 And 2010 [Member]
Income Tax Examination [Line Items]
Increase (decrease) to shareholders' net income resulting from IRS examination		$ 18,000,000