Segment information - Net Sales by Geographic Regions and Markets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenues from External Customers and Long-Lived Assets
Net sales	$ 725.7	$ 746.6	$ 809.9	$ 804.9	$ 792.1	$ 828.4	$ 875.1	$ 852.0	$ 3,087.1	$ 3,347.6	$ 3,041.7
Developed
Revenues from External Customers and Long-Lived Assets
Net sales									2,013.4	2,157.4	1,964.4
Emerging
Revenues from External Customers and Long-Lived Assets
Net sales									1,073.7	1,190.2	1,077.3
Power Transmission
Revenues from External Customers and Long-Lived Assets
Net sales									1,945.7	2,098.8	2,009.4
Power Transmission | U.S.
Revenues from External Customers and Long-Lived Assets
Net sales									580.4	606.3	582.2
Power Transmission | North America, excluding the U.S.
Revenues from External Customers and Long-Lived Assets
Net sales									165.3	159.3	148.2
Power Transmission | United Kingdom (“U.K.”)
Revenues from External Customers and Long-Lived Assets
Net sales									43.6	55.0	57.2
Power Transmission | EMEA, excluding U.K.
Revenues from External Customers and Long-Lived Assets
Net sales									509.9	584.5	551.3
Power Transmission | East Asia and India
Revenues from External Customers and Long-Lived Assets
Net sales									288.6	311.7	308.7
Power Transmission | Greater China
Revenues from External Customers and Long-Lived Assets
Net sales									288.4	310.7	285.6
Power Transmission | South America
Revenues from External Customers and Long-Lived Assets
Net sales									69.5	71.3	76.2
Fluid Power
Revenues from External Customers and Long-Lived Assets
Net sales									1,141.4	1,248.8	1,032.3
Fluid Power | U.S.
Revenues from External Customers and Long-Lived Assets
Net sales									590.0	671.7	565.9
Fluid Power | North America, excluding the U.S.
Revenues from External Customers and Long-Lived Assets
Net sales									175.9	185.6	134.8
Fluid Power | United Kingdom (“U.K.”)
Revenues from External Customers and Long-Lived Assets
Net sales									37.3	39.9	27.6
Fluid Power | EMEA, excluding U.K.
Revenues from External Customers and Long-Lived Assets
Net sales									173.6	172.8	144.8
Fluid Power | East Asia and India
Revenues from External Customers and Long-Lived Assets
Net sales									74.3	87.5	78.0
Fluid Power | Greater China
Revenues from External Customers and Long-Lived Assets
Net sales									57.8	59.0	51.5
Fluid Power | South America
Revenues from External Customers and Long-Lived Assets
Net sales									$ 32.5	$ 32.3	$ 29.7