Income Taxes (U.S. Federal Statutory Rate) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. Federal statutory rate	35.00%	35.00%	35.00%
U.S. state and local income taxes—net of U.S. Federal income tax benefit	1.50%	1.60%	1.70%
Differences related to non-U.S. operations	(9.20%)	(8.00%)	(7.50%)
Other	0.30%	0.50%	(0.70%)
Effective tax rate	27.60%	29.10%	28.50%