CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Income Statement [Abstract]
Net Sales	$ 4,263.2	$ 3,850.2	$ 12,761.2	$ 10,127.0
Costs and Expenses
Cost of sales	2,871.7	2,473.9	8,261.8	6,714.9
Selling, general and administrative	895.2	731.3	2,645.1	2,182.1
Provision for credit losses	3.6	7.6	8.2	37.3
Other, net	39.5	74.3	152.3	236.1
Loss on sales of businesses	0.0	0.0	3.6	0.0
Restructuring charges	5.8	42.8	22.1	74.6
Interest expense	45.8	52.7	139.8	169.7
Interest income	(2.3)	(2.0)	(7.9)	(14.6)
Costs and Expenses	3,859.3	3,380.6	11,225.0	9,400.1
Earnings before income taxes and equity interest	403.9	469.6	1,536.2	726.9
Income tax expense (benefit)	(0.4)	78.4	192.8	(26.0)
Net earnings before equity interest	404.3	391.2	1,343.4	752.9
Share of net earnings of equity method investment	9.8	4.0	16.0	14.1
Net earnings	414.1	395.2	1,359.4	767.0
Less: Net (losses) earnings attributable to non-controlling interests	(0.1)	0.3	(1.7)	0.5
Net earnings attributable to Stanley Black & Decker, Inc.	414.2	394.9	1,361.1	766.5
Less: Preferred stock dividends	0.0	9.4	14.2	14.1
Add: Contract adjustment payments accretion	0.4	0.0	0.9	0.0
Net Earnings Attributable to Common Shareowners	414.6	385.5	1,347.8	752.4
Total Comprehensive Income Attributable to Common Shareowners	$ 326.8	$ 465.0	$ 1,186.7	$ 675.9
Earnings per share of common stock:
Basic (in dollars per share)	$ 2.60	$ 2.47	$ 8.50	$ 4.91
Diluted (in dollar per share)	2.51	2.44	8.17	4.86
Dividends per share of common stock (in dollars per share)	$ 0.79	$ 0.70	$ 2.19	$ 2.08
Weighted Average Shares Outstanding:
Basic (in shares)	159,444	156,370	158,494	153,345
Diluted (in shares)	165,336	157,971	164,900	154,759