Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedge Gain (Loss)	Foreign Currency Translation	Defined Benefit Pension and Retiree Health Benefit Plans
Balance at beginning of period (in shares) at Dec. 31, 2018			365.6
Balance at beginning of period at Dec. 31, 2018		$ 5,197.5	$ 0.0	$ 5,403.3	$ 16.4	$ (222.2)	$ 0.0	$ (218.2)	$ (4.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		31.5			31.5
Other comprehensive income (loss), net of tax		(28.2)				(28.2)		(30.2)	2.0
Separation activities	[1]	(7.0)		(7.0)
Stock compensation		2.4		2.4
Issuance of stock under employee stock plans, net (in shares)			0.1
Balance at end of period (in shares) at Mar. 31, 2019			365.7
Balance at end of period at Mar. 31, 2019		5,196.2	$ 0.0	5,398.7	47.9	(250.4)	0.0	(248.4)	(2.0)
Balance at beginning of period (in shares) at Dec. 31, 2019			373.0
Balance at beginning of period at Dec. 31, 2019		5,546.9	$ 0.0	5,636.3	84.3	(173.7)	0.0	(198.4)	24.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(49.1)			(49.1)
Other comprehensive income (loss), net of tax		(68.9)				(68.9)	(39.2)	(29.3)	(0.4)
Separation activities	[1]	15.8		15.8
Stock compensation		11.1		11.1
Issuance of stock under employee stock plans, net (in shares)			0.8
Issuance of stock under employee stock plans, net		(12.8)		(12.8)
Issuance of common stock, net of issuance costs (in shares)	[2]		25.0
Issuance of common stock, net of issuance costs	[2]	767.5		767.5
Issuance of tangible equity units, net of issuance costs	[2]	452.4		452.4
Balance at end of period (in shares) at Mar. 31, 2020			398.8
Balance at end of period at Mar. 31, 2020		$ 6,661.5	$ 0.0	$ 6,870.3	$ 33.8	$ (242.6)	$ (39.2)	$ (227.7)	$ 24.3

[1] See Note 16: Related Party Agreements and Transactions for further discussion

[2] See Note 9: Equity for further discussion