Segment Information Sales by Major Product Group (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 29, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jul. 01, 2016 |
Apr. 01, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Revenue from External Customer [Line Items] | |||||||||||
| Sales | $ 1,806.7 | $ 1,685.3 | $ 1,628.8 | $ 1,535.2 | $ 1,627.1 | $ 1,567.4 | $ 1,555.1 | $ 1,474.7 | $ 6,656.0 | $ 6,224.3 | $ 6,178.8 |
| Professional Tools and Equipment [Member] | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Sales | 4,352.5 | 4,005.9 | 3,959.7 | ||||||||
| Industrial Automation, Controls and Sensors [Member] | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Sales | 1,207.7 | 1,138.2 | 1,170.5 | ||||||||
| Franchise Distribution [Member] | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Sales | 626.2 | 618.1 | 590.4 | ||||||||
| All Other Products and Services [Member] | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Sales | $ 469.6 | $ 462.1 | $ 458.2 | ||||||||