Condensed Consolidated Statements of Stockholders' (Deficit) Equity Statement - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock in Treasury	Accumulated Other Comprehensive Loss, Net of Taxes
Balance at beginning of period at Dec. 31, 2016	$ 609.7	$ 22.8	$ 1,974.1	$ 1,040.0	$ (1,478.1)	$ (949.1)
Effect of share-based incentive compensation	16.7	0.2	38.7		(22.2)
Stock issued for profit sharing contribution paid in stock	22.3		0.5		21.8
Repurchases of common stock	(757.3)		(80.0)		(677.3)
Recognition of pension items, net of taxes	179.9					179.9
Foreign currency translation adjustments	5.5					5.5
Unrealized (loss) gain on derivative instruments, net of taxes	(72.2)					(72.2)
Net earnings (loss)	848.4			848.4
Dividends on common stock	(92.4)			(92.4)
Balance at end of period at Sep. 30, 2017	760.6	23.0	1,933.3	1,796.0	(2,155.8)	(835.9)
Balance at beginning of period at Jun. 30, 2017	355.9	23.0	1,943.7	1,039.2	(1,729.4)	(920.6)
Effect of share-based incentive compensation	15.2		15.6		(0.4)
Repurchases of common stock	(452.0)		(26.0)		(426.0)
Recognition of pension items, net of taxes	174.6					174.6
Foreign currency translation adjustments	(68.3)					(68.3)
Unrealized (loss) gain on derivative instruments, net of taxes	(21.6)					(21.6)
Net earnings (loss)	787.5			787.5
Dividends on common stock	(30.7)			(30.7)
Balance at end of period at Sep. 30, 2017	760.6	23.0	1,933.3	1,796.0	(2,155.8)	(835.9)
Balance at beginning of period at Dec. 31, 2017	152.3	23.0	1,939.6	1,735.2	(2,700.6)	(844.9)
Effect of share-based incentive compensation	15.1	0.2	22.9		(8.0)
Stock issued for profit sharing contribution paid in stock	24.5		0.7		23.8
Repurchases of common stock	(523.3)		80.0		(603.3)
Recognition of pension items, net of taxes	3.3					3.3
Foreign currency translation adjustments	(40.6)					(40.6)
Unrealized (loss) gain on derivative instruments, net of taxes	11.5					11.5
Net earnings (loss)	(7.2)			(7.2)
Dividends on common stock	(77.9)			(77.9)
Balance at end of period at Sep. 30, 2018	(445.7)	23.2	2,043.2	1,646.7	(3,288.1)	(870.7)
Balance at beginning of period at Jun. 30, 2018	(372.4)	23.2	2,035.0	1,593.2	(3,165.0)	(858.8)
Effect of share-based incentive compensation	6.6		8.2		(1.6)
Repurchases of common stock	(121.5)				(121.5)
Recognition of pension items, net of taxes	2.2					2.2
Foreign currency translation adjustments	(11.9)					(11.9)
Unrealized (loss) gain on derivative instruments, net of taxes	(2.2)					(2.2)
Net earnings (loss)	79.0			79.0
Dividends on common stock	(25.5)			(25.5)
Balance at end of period at Sep. 30, 2018	$ (445.7)	$ 23.2	$ 2,043.2	$ 1,646.7	$ (3,288.1)	$ (870.7)