Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions		Total		Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock in Treasury	Accumulated Other Comprehensive Loss, Net of Taxes
Beginning Balance at Dec. 31, 2014		$ 1,162.8		$ 22.5	$ 1,787.0	$ 448.5	$ (481.4)	$ (613.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of contingent stock transactions		49.3		0.1	58.6		(9.4)
Stock issued for share-based incentive compensation		50.3			23.2		27.1
Repurchases of common stock		(802.0)					(802.0)
Unrecognized pension items, net of taxes		(15.9)						(15.9)
Foreign currency translation adjustments		(194.1)						(194.1)
Unrealized gain (loss) on derivative instruments, net of taxes		3.8						3.8
Settlement share transfer and excess tax benefit	[1]	46.2			46.2
Dividends on common stock		335.4	[2]			335.4
Dividends on common stock		(108.7)				(108.7)
Ending Balance at Dec. 31, 2015		527.1		22.6	1,915.0	675.2	(1,265.7)	(820.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of contingent stock transactions		29.4		0.2	59.9	0.0	(30.7)	0.0
Stock issued for share-based incentive compensation		37.4		0.0	2.1		35.3
Repurchases of common stock		(217.0)					(217.0)
Unrecognized pension items, net of taxes		(10.7)						(10.7)
Foreign currency translation adjustments		(137.9)						(137.9)
Unrealized gain (loss) on derivative instruments, net of taxes		19.5						19.5
Settlement share transfer and excess tax benefit		(2.9)			(2.9)
Dividends on common stock		486.4				486.4
Dividends on common stock		(121.6)				(121.6)
Ending Balance at Dec. 31, 2016		609.7		22.8	1,974.1	1,040.0	(1,478.1)	(949.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of contingent stock transactions		23.0		0.2	45.0	0.0	(22.2)	0.0
Stock issued for share-based incentive compensation		22.3			0.5		21.8
Repurchases of common stock		(1,302.1)			(80.0)		(1,222.1)	0.0
Unrecognized pension items, net of taxes		173.3						173.3
Foreign currency translation adjustments		7.5						7.5
Unrealized gain (loss) on derivative instruments, net of taxes		(76.6)			0.0			(76.6)
Settlement share transfer and excess tax benefit		0.0				0.0	0.0
Dividends on common stock		814.9				814.9
Dividends on common stock		(119.7)		0.0	0.0	(119.7)	0.0	0.0
Ending Balance at Dec. 31, 2017		$ 152.3		$ 23.0	$ 1,939.6	$ 1,735.2	$ (2,700.6)	$ (844.9)

[1] In 2015, we recorded an out-of-period adjustment of $46.2 million related to excess tax benefits from the Settlement agreement. Refer to Note 16, “Income Taxes” of the Notes to Consolidated Financial Statements for further details.

[2] During the first quarter of 2015, the Company received the tax refund of $235.2 million related to the Settlement agreement payment. See Note 16 “Income Taxes” of the Notes to Consolidated Financial Statements for further discussion of the out-of-period adjustment.