Components of Changes in Accumulated Other Comprehensive Income (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	[1],[2]	Jun. 30, 2014	[1],[2]
Statement Of Stockholders Equity [Abstract]
Amounts of gain reclassified to consolidated statement of income	$ 3.3	$ 0.1	$ (1.6)		$ 0.4

[1] Amounts classified to cost of sales and selling, general and administrative expenses.

[2] The Company reclassified a loss of $3.3 and a gain of $0.1 to the consolidated statement of income during the three months ended June 30, 2015 and 2014, respectively.