Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	COMMON STOCK, $1 PAR VALUE:	ADDITIONAL PAID-IN CAPITAL:	TREASURY STOCK, AT COST:	RETAINED EARNINGS:	ACCUMULATED OTHER COMPREHENSIVE LOSS:
Beginning balance at Dec. 31, 2020		$ 346.6	$ 88.5		$ 11,148.5	$ (1,050.3)
Net income	$ 966.3				966.3
Purchases				$ (1.4)
Cash dividends declared on common stock					(229.6)
Stock compensation		0.6	40.4
Other comprehensive (loss) income	20.7					20.7
Ending balance at Jun. 30, 2021	11,330.3	347.2	128.9	(1.4)	11,885.2	(1,029.6)
Beginning balance at Mar. 31, 2021		347.2	124.3	(1.4)	11,508.0	(1,116.4)
Net income	495.5				495.5
Cash dividends declared on common stock					(118.3)
Stock compensation			4.6
Other comprehensive (loss) income	86.8					86.8
Ending balance at Jun. 30, 2021	11,330.3	347.2	128.9	(1.4)	11,885.2	(1,029.6)
Beginning balance at Dec. 31, 2021	11,594.0	347.3	142.0		12,025.8	(921.1)
Net income	1,320.9				1,320.9
Purchases				(1.9)
Cash dividends declared on common stock					(236.8)
Stock compensation		0.4	32.0
Other comprehensive (loss) income	(190.6)					(190.6)
Ending balance at Jun. 30, 2022	12,518.0	347.7	174.0	(1.9)	13,109.9	(1,111.7)
Beginning balance at Mar. 31, 2022		347.7	167.3	(1.9)	12,507.9	(877.7)
Net income	720.4				720.4
Cash dividends declared on common stock					(118.4)
Stock compensation			6.7
Other comprehensive (loss) income	(234.0)					(234.0)
Ending balance at Jun. 30, 2022	$ 12,518.0	$ 347.7	$ 174.0	$ (1.9)	$ 13,109.9	$ (1,111.7)