CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement [Abstract]
Net Sales	$ 3,850.2	$ 3,633.1	$ 10,127.0	$ 10,728.0
Costs and Expenses
Cost of sales	2,473.9	2,393.6	6,714.9	7,083.1
Selling, general and administrative	731.3	752.8	2,182.1	2,289.6
Provision for credit losses	7.6	3.3	37.3	27.7
Other, net	74.3	55.0	236.1	182.6
Gain on sale of business	0.0	0.0	0.0	(17.2)
Restructuring charges	42.8	74.0	74.6	91.2
Interest expense	52.7	72.4	169.7	219.2
Interest income	(2.0)	(12.7)	(14.6)	(41.4)
Costs and Expenses	3,380.6	3,338.4	9,400.1	9,834.8
Earnings before income taxes and equity interest	469.6	294.7	726.9	893.2
Income taxes	78.4	59.2	(26.0)	135.5
Net earnings before equity interest	391.2	235.5	752.9	757.7
Share of net earnings (losses) of equity method investment	4.0	(4.4)	14.1	1.2
Net earnings	395.2	231.1	767.0	758.9
Less: Net earnings attributable to non-controlling interests	0.3	0.6	0.5	2.2
Net earnings attributable to Stanley Black & Decker, Inc.	394.9	230.5	766.5	756.7
Less: Preferred stock dividends	9.4	0.0	14.1	0.0
Net Earnings Attributable to Common Shareowners	385.5	230.5	752.4	756.7
Total Comprehensive Income Attributable to Common Shareowners	$ 465.0	$ 99.6	$ 675.9	$ 626.1
Earnings per share of common stock:
Basic (in shares)	$ 2.47	$ 1.55	$ 4.91	$ 5.11
Diluted (in shares)	2.44	1.53	4.86	5.03
Dividends per share of common stock (in dollars per share)	$ 0.70	$ 0.69	$ 2.08	$ 2.01
Weighted Average Shares Outstanding (in thousands):
Basic (in shares)	156,370	148,350	153,345	148,111
Diluted (in shares)	157,971	150,623	154,759	150,299