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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended												12 Months Ended
	Feb. 06, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 10, 2022
Equity, Class of Treasury Stock [Line Items]
Unrealized currency translation gains														$ 18.2	$ 57.9	$ (98.6)
Defined benefit pension plan settlement charges										$ 109.8						109.8
Cash dividends paid														$ 346.1	$ 361.6	$ 380.5
Common stock dividends (USD per share)		$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.94	$ 0.94	$ 0.94
Stock repurchased and retired, publicly announced authorizations (shares)														24,300,000	22,300,000	19,500,000
Stock repurchased and retired, publicly announced authorizations, value excluding commissions														$ 300.0	$ 351.8	$ 400.0
Stock repurchased and retired, publicly announced authorizations, average cost per share excluding commissions (USD per share)														$ 12.35	$ 15.81	$ 20.56
Stock repurchase program expiration date														Dec. 31, 2021
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Common stock dividends (USD per share)	$ 0.235
Dividends payable, date declared	Feb. 06, 2024
Dividends payable, date to be paid	Mar. 29, 2024
Authorized through December 31, 2024
Equity, Class of Treasury Stock [Line Items]
Stock repurchases authorized amount																	$ 1,000.0
Remaining amount available under share repurchase authorization		$ 348.2												$ 348.2
Business Solutions | Asset Held for Sale, Not Discontinued Operations
Equity, Class of Treasury Stock [Line Items]
Unrealized currency translation gains															$ 17.8

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