Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 1,242.8	$ 1,085.4	$ 3,705.2	$ 3,334.4
Cost of sales	218.1	215.4	693.4	638.8
Gross profit	1,024.7	870.0	3,011.8	2,695.6
Royalty overrides	344.0	310.1	1,031.1	944.1
Selling, general, and administrative expenses	499.4	445.2	1,469.7	1,327.0
Other operating income	(6.0)	(4.6)	(23.9)	(43.5)
Operating income	187.3	119.3	534.9	468.0
Interest expense, net	39.9	38.4	124.1	106.5
Other expense, net	30.9	0.0	60.0	0.0
Income before income taxes	116.5	80.9	350.8	361.5
Income taxes	45.3	26.4	103.1	84.2
Net income	$ 71.2	$ 54.5	$ 247.7	$ 277.3
Earnings per share:
Basic	$ 0.52	$ 0.34	$ 1.75	$ 1.70
Diluted	$ 0.49	$ 0.33	$ 1.64	$ 1.63
Weighted-average shares outstanding:
Basic	136.2	159.1	141.3	162.7
Diluted	145.6	165.9	150.8	170.1