Segments and Geographic Information - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 12,939.4	$ 13,259.5
Cash and cash equivalents	229.3	360.3	$ 446.2	$ 521.9
Operating Segments
Segment Reporting Information [Line Items]
Total assets	12,275.6	12,472.1
Operating Segments | CCS [Member]
Segment Reporting Information [Line Items]
Total assets	4,477.6	4,377.2
Operating Segments | ANS [Member]
Segment Reporting Information [Line Items]
Total assets	3,763.6	3,831.9
Operating Segments | NICS [Member]
Segment Reporting Information [Line Items]
Total assets	1,305.7	1,397.0
Operating Segments | OWN [Member]
Segment Reporting Information [Line Items]
Total assets	1,354.9	1,386.5
Operating Segments | Home [Member]
Segment Reporting Information [Line Items]
Total assets	1,373.8	1,479.5
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents	229.3	360.3
Deferred income tax assets	$ 434.5	$ 427.1