Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2020	$ 22,954.1	$ 12.1	$ 18,438.8	$ 5,361.2	$ 0.0	$ (858.0)
Balance (in shares) at Dec. 31, 2020		1,206,895,644
Balance (in shares) at Dec. 31, 2020					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	(1,005.3)
Other comprehensive loss, net of tax	(613.9)					(613.9)
Issuance of restricted stock, net of shares withheld (in shares)		2,483,318
Issuance of restricted stock and stock options exercised, net	0.0		0.0
Taxes related to the net share settlement of equity awards	(13.4)		(13.4)
Share-based compensation expense	88.7		88.7
Cash dividends declared				(268.9)
Balance at Sep. 30, 2021	21,141.3	$ 12.1	18,514.1	4,087.0	$ 0.0	(1,471.9)
Balance (in shares) at Sep. 30, 2021		1,209,378,962
Balance (in shares) at Sep. 30, 2021					0
Balance at Jun. 30, 2021	21,206.9	$ 12.1	18,489.9	3,909.9	$ 0.0	(1,205.0)
Balance (in shares) at Jun. 30, 2021		1,209,212,338
Balance (in shares) at Jun. 30, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	311.5
Other comprehensive loss, net of tax	(266.9)					(266.9)
Issuance of restricted stock, net of shares withheld (in shares)		166,624
Issuance of restricted stock and stock options exercised, net	0.0		0.0
Taxes related to the net share settlement of equity awards	(0.8)		(0.8)
Share-based compensation expense	25.0		25.0
Cash dividends declared				(134.4)
Balance at Sep. 30, 2021	21,141.3	$ 12.1	18,514.1	4,087.0	$ 0.0	(1,471.9)
Balance (in shares) at Sep. 30, 2021		1,209,378,962
Balance (in shares) at Sep. 30, 2021					0
Balance at Dec. 31, 2021	20,492.7	$ 12.1	18,536.1	3,688.8	$ 0.0	(1,744.3)
Balance (in shares) at Dec. 31, 2021		1,209,507,463
Balance (in shares) at Dec. 31, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	1,067.4			1,067.4
Other comprehensive loss, net of tax	(2,014.8)					(2,014.8)
Issuance of restricted stock, net of shares withheld (in shares)		2,911,515
Issuance of restricted stock and stock options exercised, net	0.0	$ 0.0	0.0
Taxes related to the net share settlement of equity awards	(8.6)		(8.6)
Share-based compensation expense	$ 86.8		86.8
Issuance of common stock (in shares)	234,487
Issuance of common stock	$ 2.5		2.5
Cash dividends declared				(443.7)
Balance at Sep. 30, 2022	19,182.3	$ 12.1	18,616.8	4,312.5	$ 0.0	(3,759.1)
Balance (in shares) at Sep. 30, 2022		1,212,653,465
Balance (in shares) at Sep. 30, 2022					0
Balance at Jun. 30, 2022	19,805.4	$ 12.1	18,585.7	4,106.8	$ 0.0	(2,899.2)
Balance (in shares) at Jun. 30, 2022		1,212,447,457
Balance (in shares) at Jun. 30, 2022					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	354.3			354.3
Other comprehensive loss, net of tax	(859.9)					(859.9)
Issuance of restricted stock, net of shares withheld (in shares)		31,203
Issuance of restricted stock and stock options exercised, net	0.0	$ 0.0	0.0
Taxes related to the net share settlement of equity awards	(0.2)		(0.2)
Share-based compensation expense	$ 29.1		29.1
Issuance of common stock (in shares)	174,805
Issuance of common stock	$ 1.8
Cash dividends declared				(148.6)
Balance at Sep. 30, 2022	$ 19,182.3	$ 12.1	$ 18,616.8	$ 4,312.5	$ 0.0	$ (3,759.1)
Balance (in shares) at Sep. 30, 2022		1,212,653,465
Balance (in shares) at Sep. 30, 2022					0