Income Taxes (Detail) - Differences Between U.S. Federal Statutory Income Tax Rate and Effective Tax Rate on Income Before Income Taxes	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory tax rate	35.00%		35.00%		35.00%
State income taxes, net of federal benefit	3.10%		3.20%		1.80%
Effect of non-U.S. operations	(7.00%)	[1]	(6.10%)	[1]	(6.40%)	[1]
Record (release) reserve for tax contingencies	2.60%		0.90%		0.70%
Record (release) valuation allowance	0.00%		(0.50%)		0.00%
Other items, net	(0.60%)		(1.10%)		(1.50%)
Effective tax rate	33.10%		31.40%		29.60%

[1] Includes the effect of foreign income taxed at different rates, U.S. tax on actual and deemed distributions, and foreign tax credits.