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:	RETAINED EARNINGS: Adjustment Cumulative Effect of Change in Accounting Principle	ACCUMULATED OTHER COMPREHENSIVE LOSS:
Beginning balance at Dec. 31, 2019			$ 346.3	$ 61.4		$ 10,398.5		$ (1,100.1)
Net income	$ 507.1					507.1
Purchases					$ (41.6)
Cash dividends declared on common stock						(221.9)
Stock compensation			0.2	21.3
Other comprehensive income (loss)	(189.8)							(189.8)
Ending balance at Jun. 30, 2020	9,776.8		346.5	82.7	(41.6)	10,679.1	$ (4.6)	(1,289.9)
Beginning balance at Mar. 31, 2020			346.4	74.2	(41.5)	10,642.2		(1,383.9)
Net income	147.7					147.7
Purchases					(0.1)
Cash dividends declared on common stock						(110.8)
Stock compensation			0.1	8.5
Other comprehensive income (loss)	94.0							94.0
Ending balance at Jun. 30, 2020	9,776.8		346.5	82.7	(41.6)	10,679.1	$ (4.6)	(1,289.9)
Beginning balance at Dec. 31, 2020	10,390.0	[1]	346.6	88.5		11,005.2		(1,050.3)
Net income	963.0					963.0
Purchases					(1.4)
Cash dividends declared on common stock						(229.5)
Stock compensation			0.6	40.4
Other comprehensive income (loss)	20.7							20.7
Ending balance at Jun. 30, 2021	11,183.8		347.2	128.9	(1.4)	11,738.7		(1,029.6)
Beginning balance at Mar. 31, 2021			347.2	124.3	(1.4)	11,364.0		(1,116.4)
Net income	492.9					492.9
Cash dividends declared on common stock						(118.2)
Stock compensation				4.6
Other comprehensive income (loss)	86.8							86.8
Ending balance at Jun. 30, 2021	$ 11,183.8		$ 347.2	$ 128.9	$ (1.4)	$ 11,738.7		$ (1,029.6)

[1] The December 31, 2020 consolidated balance sheet has been derived from audited financial statements.