Schedule of Controlling and Non-Controlling Interest (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Noncontrolling Interest [Line Items]
Balance at beginning of period	$ 3,926.4	$ 3,468.1
Total Comprehensive Income:
Net income	142.1	133.5
Foreign currency translation	88.4	59.6
Net change in cash flow hedges	(2.6)	(1.2)
Defined benefit pension plan	1.2	0.8
Comprehensive income	229.1	192.7
Common Stock incentives	4.4	3.3
Cash dividends declared	(53.0)	(51.1)
Dividends paid to non-controlling interest on subsidiary shares		(1.7)
Investment in subsidiary by non-controlling interest		253.9
Balance at end of period	4,106.9	3,865.2
Controlling
Noncontrolling Interest [Line Items]
Balance at beginning of period	3,677.2	3,455.6
Total Comprehensive Income:
Net income	143.9	133.2
Foreign currency translation	82.6	59.6
Net change in cash flow hedges	(2.6)	(1.2)
Defined benefit pension plan	1.2	0.8
Comprehensive income	225.1	192.4
Common Stock incentives	4.4	3.3
Cash dividends declared	(53.0)	(51.1)
Balance at end of period	3,853.7	3,600.2
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Balance at beginning of period	249.2	12.5
Total Comprehensive Income:
Net income	(1.8)	0.3
Foreign currency translation	5.8
Comprehensive income	4.0	0.3
Dividends paid to non-controlling interest on subsidiary shares		(1.7)
Investment in subsidiary by non-controlling interest		253.9
Balance at end of period	$ 253.2	$ 265.0