Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings available to common stockholders	$ 814.9	$ 486.4	$ 335.4	[1]
Other comprehensive income (loss), net of taxes:
Unrecognized pension items, net of taxes of $(45.8) for 2017, $2.4 for 2016 and $5.4 for 2015	173.3	(10.7)	(15.9)
Foreign currency translation adjustments, net of tax of $5.3 for 2017, $(19.8) for 2016 and $16.9 for 2015	7.5	(137.9)	(194.1)
Other comprehensive income (loss), net of taxes	104.2	(129.1)	(206.2)
Comprehensive income, net of taxes	919.1	357.3	129.2
Net Investment Hedge
Other comprehensive income (loss), net of taxes:
Unrealized gain (losses) on derivative instruments, net of taxes	(67.8)	19.3	1.7
Cash Flow Hedge
Other comprehensive income (loss), net of taxes:
Unrealized gain (losses) on derivative instruments, net of taxes	$ (8.8)	$ 0.2	$ 2.1

[1] During the first quarter of 2015, the Company received the tax refund of $235.2 million related to the Settlement agreement payment. See Note 16 “Income Taxes” of the Notes to Consolidated Financial Statements for further discussion of the out-of-period adjustment.