Supplemental Guarantor Information - Consolidating Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Supplemental Guarantor Information [Line Items]
Net sales	$ 4,186.1	$ 3,891.7	$ 7,792.5	$ 7,147.6
Cost of sales	3,490.5	3,250.9	6,493.0	5,953.3
Gross profit	695.6	640.8	1,299.5	1,194.3
Selling and administrative expenses	381.4	363.5	744.1	710.9
Advertising expense	48.7	46.5	85.8	81.9
Income from operations	265.5	230.8	469.6	401.5
Interest expense, net	(37.2)	(35.9)	(74.9)	(75.6)
Net loss on extinguishments of long-term debt	0.0	0.0	0.0	(57.4)
Other income, net	1.5	0.4	0.8	1.3
Income before income taxes	229.8	195.3	395.5	269.8
Income tax (expense) benefit	(56.8)	(54.4)	(95.5)	(70.8)
Income (Loss) before equity in earnings (loss) of subsidiaries	173.0	140.9	300.0	199.0
Equity in earnings of subsidiaries	0.0	0.0	0.0	0.0
Net income	173.0	140.9	300.0	199.0
Consolidating Adjustments
Supplemental Guarantor Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling and administrative expenses	0.0	0.0	0.0	0.0
Advertising expense	0.0	0.0	0.0	0.0
Income from operations	0.0	0.0	0.0	0.0
Interest expense, net	0.0	0.0	0.0	0.0
Net loss on extinguishments of long-term debt				0.0
Other income, net	0.0	0.0	0.0	0.0
Income before income taxes	0.0	0.0	0.0	0.0
Income tax (expense) benefit	0.0	0.0	0.0	0.0
Income (Loss) before equity in earnings (loss) of subsidiaries	0.0	0.0	0.0	0.0
Equity in earnings of subsidiaries	(397.8)	(320.4)	(702.8)	(507.2)
Net income	(397.8)	(320.4)	(702.8)	(507.2)
Parent Guarantor | Reportable Legal Entities
Supplemental Guarantor Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling and administrative expenses	0.0	0.0	0.0	0.0
Advertising expense	0.0	0.0	0.0	0.0
Income from operations	0.0	0.0	0.0	0.0
Interest expense, net	0.0	0.0	0.0	0.0
Net loss on extinguishments of long-term debt				0.0
Other income, net	0.0	0.0	0.0	0.0
Income before income taxes	0.0	0.0	0.0	0.0
Income tax (expense) benefit	(0.1)	0.0	(0.2)	0.0
Income (Loss) before equity in earnings (loss) of subsidiaries	(0.1)	0.0	(0.2)	0.0
Equity in earnings of subsidiaries	173.1	140.9	300.2	199.0
Net income	173.0	140.9	300.0	199.0
Subsidiary Issuer | Reportable Legal Entities
Supplemental Guarantor Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling and administrative expenses	35.1	32.6	69.6	63.9
Advertising expense	0.0	0.0	0.0	0.0
Income from operations	(35.1)	(32.6)	(69.6)	(63.9)
Interest expense, net	(36.7)	(35.4)	(73.8)	(74.5)
Net loss on extinguishments of long-term debt				(57.4)
Other income, net	0.0	0.0	0.0	0.0
Income before income taxes	(71.8)	(68.0)	(143.4)	(195.8)
Income tax (expense) benefit	20.2	29.4	41.0	86.6
Income (Loss) before equity in earnings (loss) of subsidiaries	(51.6)	(38.6)	(102.4)	(109.2)
Equity in earnings of subsidiaries	224.7	179.5	402.6	308.2
Net income	173.1	140.9	300.2	199.0
Guarantor Subsidiaries | Reportable Legal Entities
Supplemental Guarantor Information [Line Items]
Net sales	3,698.7	3,528.0	6,822.1	6,414.2
Cost of sales	3,083.0	2,947.6	5,680.0	5,340.5
Gross profit	615.7	580.4	1,142.1	1,073.7
Selling and administrative expenses	289.6	284.6	562.0	554.5
Advertising expense	47.2	44.9	82.4	78.9
Income from operations	278.9	250.9	497.7	440.3
Interest expense, net	0.9	1.1	1.9	2.1
Net loss on extinguishments of long-term debt				0.0
Other income, net	0.1	0.1	0.5	0.3
Income before income taxes	279.9	252.1	500.1	442.7
Income tax (expense) benefit	(72.0)	(80.7)	(127.3)	(151.3)
Income (Loss) before equity in earnings (loss) of subsidiaries	207.9	171.4	372.8	291.4
Equity in earnings of subsidiaries	0.0	0.0	0.0	0.0
Net income	207.9	171.4	372.8	291.4
Non-Guarantor Subsidiaries | Reportable Legal Entities
Supplemental Guarantor Information [Line Items]
Net sales	487.4	363.7	970.4	733.4
Cost of sales	407.5	303.3	813.0	612.8
Gross profit	79.9	60.4	157.4	120.6
Selling and administrative expenses	56.7	46.3	112.5	92.5
Advertising expense	1.5	1.6	3.4	3.0
Income from operations	21.7	12.5	41.5	25.1
Interest expense, net	(1.4)	(1.6)	(3.0)	(3.2)
Net loss on extinguishments of long-term debt				0.0
Other income, net	1.4	0.3	0.3	1.0
Income before income taxes	21.7	11.2	38.8	22.9
Income tax (expense) benefit	(4.9)	(3.1)	(9.0)	(6.1)
Income (Loss) before equity in earnings (loss) of subsidiaries	16.8	8.1	29.8	16.8
Equity in earnings of subsidiaries	0.0	0.0	0.0	0.0
Net income	16.8	8.1	29.8	16.8
Co-Issuer | Reportable Legal Entities
Supplemental Guarantor Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling and administrative expenses	0.0	0.0	0.0	0.0
Advertising expense	0.0	0.0	0.0	0.0
Income from operations	0.0	0.0	0.0	0.0
Interest expense, net	0.0	0.0	0.0	0.0
Net loss on extinguishments of long-term debt				0.0
Other income, net	0.0	0.0	0.0	0.0
Income before income taxes	0.0	0.0	0.0	0.0
Income tax (expense) benefit	0.0	0.0	0.0	0.0
Income (Loss) before equity in earnings (loss) of subsidiaries	0.0	0.0	0.0	0.0
Equity in earnings of subsidiaries	0.0	0.0	0.0	0.0
Net income	$ 0.0	$ 0.0	$ 0.0	$ 0.0