Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings	Treasury Stock [Member]	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2017	$ 13,307.6	$ 6.0	$ 8,586.0	$ 5,644.5	$ (567.7)	$ (361.2)
Balance (in shares) at Dec. 31, 2017		537,902,426
Balance (in shares) at Dec. 31, 2017					13,695,251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	301.3
Other comprehensive loss, net of tax	(1,122.2)					(1,122.2)
Common stock share repurchase	(432.0)
Common stock share repurchase (in shares)					(9,795,616)
Payments for Repurchase of Common Stock	432.0
Stock options exercised, net of shares tendered for payment (in shares)		1,201,678
Issuance of restricted stock, net of shares withheld	15.4		15.4
Taxes related to the net share settlement of equity awards	(8.1)		(8.1)
Stock compensation expense	(8.6)		(8.6)
Cumulative effect of the adoption of new accounting standards	6.2			13.7		(7.5)
Other	0.0		0.3	0.3
Balance at Sep. 30, 2018	12,059.6	$ 6.0	8,585.0	5,959.2	$ (999.7)	(1,490.9)
Balance (in shares) at Sep. 30, 2018		539,104,104
Balance (in shares) at Sep. 30, 2018					23,490,867
Balance at Jun. 30, 2018	12,202.1	$ 6.0	8,612.6	5,782.5	$ (999.7)	(1,199.3)
Balance (in shares) at Jun. 30, 2018		539,010,910
Balance (in shares) at Jun. 30, 2018					23,490,867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	176.7
Other comprehensive loss, net of tax	(291.6)					(291.6)
Stock options exercised, net of shares tendered for payment (in shares)		93,194
Issuance of restricted stock, net of shares withheld	1.7		1.7
Taxes related to the net share settlement of equity awards	(0.1)		(0.1)
Stock compensation expense	(29.2)		(29.2)
Balance at Sep. 30, 2018	12,059.6	$ 6.0	8,585.0	5,959.2	$ (999.7)	(1,490.9)
Balance (in shares) at Sep. 30, 2018		539,104,104
Balance (in shares) at Sep. 30, 2018					23,490,867
Balance at Dec. 31, 2018	12,167.1	$ 6.0	8,591.4	6,010.7	$ (999.7)	(1,441.3)
Balance (in shares) at Dec. 31, 2018		539,289,665
Balance (in shares) at Dec. 31, 2018					23,490,867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	(3.7)
Other comprehensive loss, net of tax	(746.3)					(746.3)
Payments for Repurchase of Common Stock	0.0
Stock options exercised, net of shares tendered for payment (in shares)		1,449,836
Issuance of restricted stock, net of shares withheld	8.2	$ 0.1	8.1
Taxes related to the net share settlement of equity awards	(12.8)		(12.8)
Stock compensation expense	$ 50.9		50.9
Treasury Stock, Shares, Retired	0	0			1,107,207
Cumulative effect of the adoption of new accounting standards	$ 0.0			3.6		(3.6)
Balance at Sep. 30, 2019	11,463.4	$ 6.1	8,637.6	6,010.6	$ (999.7)	(2,191.2)
Balance (in shares) at Sep. 30, 2019		540,739,501
Balance (in shares) at Sep. 30, 2019					24,598,074
Balance at Jun. 30, 2019	11,902.8	$ 6.1	8,617.3	5,820.8	$ (999.7)	(1,541.7)
Balance (in shares) at Jun. 30, 2019		540,459,996
Balance (in shares) at Jun. 30, 2019					24,598,074
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	189.8
Other comprehensive loss, net of tax	(649.5)					(649.5)
Stock options exercised, net of shares tendered for payment (in shares)		279,505
Issuance of restricted stock, net of shares withheld	4.2		4.2
Taxes related to the net share settlement of equity awards	0.0		0.0
Stock compensation expense	16.1		16.1
Balance at Sep. 30, 2019	$ 11,463.4	$ 6.1	$ 8,637.6	$ 6,010.6	$ (999.7)	$ (2,191.2)
Balance (in shares) at Sep. 30, 2019		540,739,501
Balance (in shares) at Sep. 30, 2019					24,598,074