Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Shares [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2019	$ 12,392.8		$ 3.1	$ 8,920.1	$ 10,427.3		$ (241.9)	$ (6,720.5)	$ 4.7
Balance, shares at Dec. 31, 2019			309.9					(103.9)
Net earnings (loss)	(471.2)				(472.6)				1.4
Other comprehensive income (loss)	(45.2)						(45.1)		(0.1)
Cash dividends declared	(149.1)				(149.1)
Stock compensation plans	154.0			152.9	0.4			$ 0.7
Stock compensation plans, shares			1.2					0.1
Balance at Sep. 30, 2020	11,878.2	$ (3.1)	$ 3.1	9,073.0	9,802.9	$ (3.1)	(287.0)	$ (6,719.8)	6.0
Balance, shares at Sep. 30, 2020			311.1					(103.8)
Balance at Jun. 30, 2020	11,643.9		$ 3.1	9,014.0	9,610.0		(265.8)	$ (6,719.9)	2.5
Balance, shares at Jun. 30, 2020			310.7					(103.8)
Net earnings (loss)	246.1				242.5				3.6
Other comprehensive income (loss)	(21.3)						(21.2)		(0.1)
Cash dividends declared	(49.8)				(49.8)
Stock compensation plans	59.3		$ 0.4	59.0	0.2			$ 0.1
Balance at Sep. 30, 2020	11,878.2	$ (3.1)	$ 3.1	9,073.0	9,802.9	$ (3.1)	(287.0)	$ (6,719.8)	6.0
Balance, shares at Sep. 30, 2020			311.1					(103.8)
Balance at Dec. 31, 2020	12,199.4		$ 3.1	9,121.6	10,086.9		(297.8)	$ (6,719.6)	5.2
Balance, shares at Dec. 31, 2020			311.4					(103.8)
Net earnings (loss)	486.0				485.6				0.4
Other comprehensive income (loss)	(0.3)						(0.3)
Cash dividends declared	(150.3)				(150.3)
Stock compensation plans	179.4			173.5	4.1			$ 1.8
Stock compensation plans, shares			1.3
Balance at Sep. 30, 2021	12,714.2		$ 3.1	9,295.1	10,426.3		(298.1)	$ (6,717.8)	5.6
Balance, shares at Sep. 30, 2021			312.7					(103.8)
Balance at Jun. 30, 2021	12,583.3		$ 3.1	9,248.6	10,331.0		(287.0)	$ (6,717.8)	5.4
Balance, shares at Jun. 30, 2021			312.5					(103.8)
Net earnings (loss)	145.8				145.6				0.2
Other comprehensive income (loss)	(11.1)						(11.1)
Cash dividends declared	(50.3)				(50.3)
Stock compensation plans	46.5			46.5
Stock compensation plans, shares			0.2
Balance at Sep. 30, 2021	$ 12,714.2		$ 3.1	$ 9,295.1	$ 10,426.3		$ (298.1)	$ (6,717.8)	$ 5.6
Balance, shares at Sep. 30, 2021			312.7					(103.8)