Capital Stock, Accumulated Other Comprehensive Loss and Equity - Summary of Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 4,614.9	$ 4,501.1	$ 4,360.6
Balance at end of year	4,808.4	4,614.9	4,501.1
Defined benefit plans:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(276.9)	(217.6)	(172.8)
Reclassification adjustments (net of tax expense/benefit)	7.1	14.3	5.0
Other comprehensive income (loss) recognized during the period	70.4	(73.6)	(49.8)
Balance at end of year	(199.4)	(276.9)	(217.6)
Comprehensive income (loss), tax
Reclassification adjustments, tax expense (benefit)	2.1	4.7	2.0
Other comprehensive income (loss), tax (expense) benefit	(20.6)	23.2	15.7
Derivative instruments and hedge activities:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	12.6	9.8	(9.7)
Reclassification adjustments (net of tax expense/benefit)	(36.0)	7.5	(38.0)
Other comprehensive income (loss) recognized during the period	4.8	(4.7)	57.5
Balance at end of year	(18.6)	12.6	9.8
Comprehensive income (loss), tax
Reclassification adjustments, tax expense (benefit)	(8.7)	1.8	(10.2)
Other comprehensive income (loss), tax (expense) benefit	(1.2)	1.0	(15.7)
Currency translation adjustments:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(440.8)	(564.9)	(523.3)
Other comprehensive income (loss) recognized during the period	(111.4)	124.1	(41.6)
Balance at end of year	(552.2)	(440.8)	(564.9)
Comprehensive income (loss), tax
Other comprehensive income (loss), tax (expense) benefit	$ (4.1)	$ 3.8	$ 0.9