Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 6,964.3	$ 7,014.6	$ 6,444.9	[1]
Cost of sales	(5,320.3)	(5,369.3)	(4,974.1)
Gross profit	1,644.0	1,645.3	1,470.8
Selling and administrative expenses	(557.6)	(536.4)	(519.9)
Other expense, net	(32.7)	(41.2)	(18.4)
Income from operations	1,053.7	1,067.7	932.5	[2]
Non-operating pension expense	(7.9)	(2.1)	(1.3)
Interest expense, net	(128.8)	(95.1)	(102.6)
Income before taxes	917.0	970.5	828.6	[2]
Provision for income taxes	(220.6)	(232.5)	(160.0)
Net income	$ 696.4	$ 738.0	$ 668.6
Net income per common share:
Basic	$ 7.36	$ 7.82	$ 7.09
Diluted	7.34	7.80	7.07
Dividends declared per common share	$ 3.16	$ 3.00	$ 2.52
Statements of Comprehensive Income:
Net income	$ 696.4	$ 738.0	$ 668.6
Foreign currency translation adjustment		(0.1)	(0.2)
Reclassification adjustments to cash flow hedges included in net income, net of tax of $7.9 million, $1.3 million, and $2.2 million for 2019, 2018, and 2017, respectively	10.2	4.0	3.5
Amortization of pension and postretirement plans actuarial loss and prior service cost, net of tax of $3.2 million, $4.0 million, and $4.9 million for 2019, 2018, and 2017, respectively	9.6	11.8	8.2
Changes in unfunded employee benefit obligations, net of tax of $13.6 million, ($0.8) million, and $18.0 million for 2019, 2018, and 2017, respectively	(40.5)	2.4	(28.8)
Other comprehensive income (loss)	(20.7)	18.1	(17.3)
Comprehensive income	$ 675.7	$ 756.1	$ 651.3

[1] 2017 has not been adjusted under the modified retrospective method for Topic 606.

[2] Includes “Additions to property, plant, and equipment” and excludes cash used for “Acquisitions of businesses, net of cash acquired” as reported on our Consolidated Statements of Cash Flows.