Accumulated Other Comprehensive (Loss) Income (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of accumulated other comprehensive income (loss)

Changes in each component of "Accumulated other comprehensive (loss) income," net of tax, during 2020, 2019 and 2018 were as follows:

(dollars in millions)	Foreign Currency Translation Adjustments		Pension and Post-retirement Plans		Unrealized Gain (Loss) on Available for Sale Securities		Derivative Financial Instrument Revaluation		Non-Controlling Interests		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2017	$	(453.6)	$	(7.9)	$	(1.3)	$	—	$	40.8	$	(422.0)
Impact of ASU 2016-01 adoption	—		—		1.3		—		—		1.3
Adjusted balance at January 1, 2018	(453.6)		(7.9)		—		—		40.8		(420.7)
Other comprehensive income (loss) before reclassifications, net	(378.0)		1.8		—		6.0		34.5		(335.7)
Reclassifications, pretax	—		—		—		(0.5)		—		(0.5)
Balance at December 31, 2018	(831.6)		(6.1)		—		5.5		75.3		(756.9)
Other comprehensive income (loss) before reclassifications, net	70.5		0.6		—		(29.2)		(25.8)		16.1
Reclassifications, pretax	479.8		(2.1)		—		(4.5)		(14.4)		458.8
Tax expense reclassified	—		—		—		1.5		—		1.5
Balance at December 31, 2019	(281.3)		(7.6)		—		(26.7)		35.1		(280.5)
Other comprehensive income (loss) before reclassifications, net	107.4		4.4		—		(40.2)		—		71.6
Reclassifications, pretax	—		—		—		14.1		—		14.1
Balance at December 31, 2020	$	(173.9)	$	(3.2)	$	—	$	(52.8)	$	35.1	$	(194.8)