Equity - Reclassification Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Foreign currency translation adjustments:
Restructuring and other charges (income)	$ 9.0			$ 32.8			$ 98.9	$ 52.3
Derivative instruments
Costs of sales and services	899.7			682.5			2,539.1	2,078.4
Selling, general and administrative expenses	179.4			183.5			562.7	519.0
Interest expense, net	(41.8)			(33.1)			(107.0)	(98.1)
Total before tax	170.5			181.1			636.3	660.5
Provision (benefit) for income taxes	36.0			9.2			133.0	75.8
Pension and other postretirement benefits
Selling, general and administrative expenses	179.4			183.5			562.7	519.0
Net income (loss)	118.3	$ 131.2	$ 211.6	162.2	$ 205.0	$ 185.1	461.1	552.3
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)
Pension and other postretirement benefits
Net income (loss)	(12.0)			(3.1)			(31.4)	(18.7)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Derivative instruments
Derivative instruments
Total before tax	(18.1)			(1.2)			(31.7)	(15.4)
Provision (benefit) for income taxes	(6.1)			(0.6)			11.3	3.6
Pension and other postretirement benefits
Net income (loss)	(12.0)			(0.6)			(20.4)	(11.8)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Pension and other postretirement benefits
Derivative instruments
Total before tax	0.0			(3.2)			(8.6)	(8.7)
Provision (benefit) for income taxes	0.0			(0.7)			1.8	1.8
Pension and other postretirement benefits
Net income (loss)	0.0			(2.5)			(6.8)	(6.9)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Amortization of prior service costs
Derivative instruments
Selling, general and administrative expenses	0.0			(0.1)			0.0	(0.2)
Pension and other postretirement benefits
Selling, general and administrative expenses	0.0			(0.1)			0.0	(0.2)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Amortization of unrecognized net actuarial and other gains (losses)
Derivative instruments
Selling, general and administrative expenses	0.1			(2.7)			(8.1)	(8.1)
Pension and other postretirement benefits
Selling, general and administrative expenses	0.1			(2.7)			(8.1)	(8.1)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Recognized loss due to curtailment and settlement
Derivative instruments
Selling, general and administrative expenses	(0.1)			(0.4)			(0.5)	(0.4)
Pension and other postretirement benefits
Selling, general and administrative expenses	(0.1)			(0.4)			(0.5)	(0.4)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Foreign currency adjustments
Foreign currency translation adjustments:
Restructuring and other charges (income)	0.0			0.0			(4.2)	0.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Gain (loss) on foreign currency contracts | Derivative instruments
Derivative instruments
Costs of sales and services	(17.6)			(1.9)			(32.7)	(14.3)
Selling, general and administrative expenses	0.5			1.7			4.0	2.0
Pension and other postretirement benefits
Selling, general and administrative expenses	0.5			1.7			4.0	2.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Interest rate contracts
Derivative instruments
Interest expense, net	$ (1.0)			$ (1.0)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | Interest rate contracts | Derivative instruments
Derivative instruments
Interest expense, net							$ (3.0)	$ (3.1)