Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 1,176.9	$ 1,102.1
Cost of sales	239.9	204.6
Gross profit	937.0	897.5
Royalty overrides	337.3	315.1
Selling, general, and administrative expenses	460.1	438.6
Other operating income	(16.2)
Operating income	155.8	143.8
Interest expense, net	39.9	30.2
Other expense, net	24.4	0.0
Income before income taxes	91.5	113.6
Income taxes	9.4	28.4
Net income	$ 82.1	$ 85.2
Earnings per share:
Basic	$ 1.13	$ 1.03
Diluted	$ 1.08	$ 0.98
Weighted-average shares outstanding:
Basic	72.7	83.1
Diluted	76.3	86.7