Segment and Geographic Area Information - Schedule of Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net revenues	$ 1,394.8	$ 1,354.5	$ 1,330.3	$ 1,287.2	$ 1,376.3	$ 1,318.7	$ 1,293.7	$ 1,202.5	$ 5,366.8	$ 5,191.2	$ 4,607.5
Canada
Segment Reporting Information [Line Items]
Net revenues									222.4	211.3	187.1
Canada | Application Software
Segment Reporting Information [Line Items]
Net revenues									41.0	38.5	26.6
Canada | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									71.1	58.5	52.9
Canada | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									81.4	79.3	72.9
Canada | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									28.9	35.0	34.7
Europe
Segment Reporting Information [Line Items]
Net revenues									646.5	680.0	596.2
Europe | Application Software
Segment Reporting Information [Line Items]
Net revenues									188.8	188.6	176.5
Europe | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									36.7	12.2	11.0
Europe | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									307.2	361.7	310.6
Europe | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									113.8	117.5	98.1
Asia
Segment Reporting Information [Line Items]
Net revenues									315.3	349.9	325.4
Asia | Application Software
Segment Reporting Information [Line Items]
Net revenues									3.5	3.2	2.4
Asia | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									18.8	11.0	7.3
Asia | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									185.0	220.3	205.9
Asia | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									108.0	115.4	109.8
Middle East
Segment Reporting Information [Line Items]
Net revenues									103.6	102.1	112.5
Middle East | Application Software
Segment Reporting Information [Line Items]
Net revenues									8.6	4.7	4.8
Middle East | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									37.5	48.6	58.8
Middle East | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									13.1	14.4	13.4
Middle East | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									44.4	34.4	35.5
Rest of the world
Segment Reporting Information [Line Items]
Net revenues									135.8	134.8	120.0
Rest of the world | Application Software
Segment Reporting Information [Line Items]
Net revenues									25.8	29.5	23.2
Rest of the world | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									9.5	7.8	6.1
Rest of the world | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									45.3	42.5	42.0
Rest of the world | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									55.2	55.0	48.7
Non-U.S.
Segment Reporting Information [Line Items]
Net revenues									1,423.6	1,478.1	1,341.2
Non-U.S. | Application Software
Segment Reporting Information [Line Items]
Net revenues									267.7	264.5	233.5
Non-U.S. | Network Software & Systems
Segment Reporting Information [Line Items]
Net revenues									173.6	138.1	136.1
Non-U.S. | Measurement &Analytical Solutions
Segment Reporting Information [Line Items]
Net revenues									632.0	718.2	644.8
Non-U.S. | Process Technologies
Segment Reporting Information [Line Items]
Net revenues									$ 350.3	$ 357.3	$ 326.8