Capital Stock, Accumulated Other Comprehensive Loss and Equity - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended			108 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Equity [Abstract]
Aggregate Repurchases	$ 380.4	$ 705.2	$ 454.4
Cash paid for Repurchases	$ 384.7	$ 704.9	$ 450.5	$ 4,600.0
Number of Shares	2,819,081	4,308,418	3,014,131
Average Price per Share (in dollars per share)	$ 134.95	$ 163.69	$ 150.77	$ 89.83