Equity - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ (128.0)	$ (117.2)	$ (239.4)	$ (232.3)
Cost of sales	460.2	438.0	883.6	828.6
Income tax (expense) benefit	(42.9)	(59.2)	(80.7)	(106.4)
Net income	243.5	247.6	410.1	415.9
Total reclassifications, Net of tax	(7.9)	(4.7)	(11.4)	(4.3)
Accumulated defined benefit plans net prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI before tax	0.7	0.8	1.4	1.5
Accumulated defined benefit plans net gain (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI before tax	(0.2)	(0.1)	(0.5)	(0.2)
Accumulated defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI before tax	0.5	0.7	0.9	1.3
Defined benefit pension, interest expense	(1.1)	(0.2)	(1.3)	(0.5)
Total reclassifications, Net of tax	(0.6)	0.5	(0.4)	0.8
Reclassification out of Accumulated Other Comprehensive Income | Accumulated net gain (loss) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(9.8)	(7.0)	(14.8)	(6.9)
Income tax (expense) benefit	2.5	1.8	3.8	1.8
Net income	(7.3)	(5.2)	(11.0)	(5.1)
Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Contract | Accumulated net gain (loss) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	(9.0)	(5.9)	(14.9)	(9.4)
Reclassification out of Accumulated Other Comprehensive Income | Foreign Exchange Forward | Accumulated net gain (loss) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ (0.8)	$ (1.1)	$ 0.1	$ 2.5