Income Taxes (Reconciliation From Statutory Federal Income Tax Rate To Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
State tax on commercial operations, net of federal benefits	0.50%	0.70%	(1.80%)
Impact of international operations	(2.60%)	0.00%	61.90%
Domestic production deduction	(1.90%)	(2.20%)	(12.90%)
Domestic tax credits	(0.70%)	(0.80%)	(1.60%)
Goodwill impairment	0.00%	0.00%	105.90%
Other, net	(0.60%)	(1.50%)	(6.00%)
Effective income tax rate	29.70%	31.20%	180.50%