Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	$ 1,791.4	$ 1,145.4
Cash flows from investing activities:
Additions to properties	(491.0)	(466.0)
Proceeds from sales of properties and other assets	7.5	56.9
Other	(50.0)	11.1
Net cash provided by (used in) investing activities	(533.5)	(398.0)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	6.7	3.6
Dividends paid	(265.6)	(264.9)
Payments on debt and borrowings	(310.2)	(2,601.5)
Proceeds on debt and borrowings	0.0	1,536.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	(374.8)	999.7
Change in overdraft balances and other	20.5	(40.7)
Net cash provided by (used in) financing activities	(923.4)	(367.8)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	334.5	379.6
Effect of foreign exchange rate changes on cash and cash equivalents	(3.0)	30.8
Balance at beginning of year	418.6	560.9
Balance at end of period	750.1	971.3
Parent Company [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	827.7	531.2
Cash flows from investing activities:
Additions to properties	(9.0)	(12.3)
Proceeds from sales of properties and other assets	0.0	0.0
Other	0.0	0.0
Net intercompany investing activity	34.5	49.6
Net cash provided by (used in) investing activities	25.5	37.3
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	6.7	3.6
Dividends paid	(243.8)	(242.9)
Payments on debt and borrowings	0.0	(2,600.0)
Proceeds on debt and borrowings		1,536.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	(378.4)	1,003.9
Change in overdraft balances and other	(5.5)	(19.7)
Net intercompany financing activity	(32.6)	0.0
Net cash provided by (used in) financing activities	(653.6)	(319.1)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	199.6	249.4
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Balance at beginning of year	6.6	147.3
Balance at end of period	206.2	396.7
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	836.6	650.8
Cash flows from investing activities:
Additions to properties	(338.0)	(341.4)
Proceeds from sales of properties and other assets	2.5	3.7
Other	(0.8)	0.4
Net intercompany investing activity	(22.9)	(69.6)
Net cash provided by (used in) investing activities	(359.2)	(406.9)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	0.0	(497.5)
Payments on debt and borrowings	(307.2)	0.0
Proceeds on debt and borrowings		0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	0.0
Change in overdraft balances and other	(7.4)	(10.8)
Net intercompany financing activity	(181.1)	296.7
Net cash provided by (used in) financing activities	(495.7)	(211.6)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(18.3)	32.3
Effect of foreign exchange rate changes on cash and cash equivalents	2.9	4.3
Balance at beginning of year	140.9	141.5
Balance at end of period	125.5	178.1
Subsidiary Non Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	263.9	574.7
Cash flows from investing activities:
Additions to properties	(144.0)	(112.3)
Proceeds from sales of properties and other assets	5.0	53.2
Other	(49.2)	10.7
Net intercompany investing activity	189.9	(347.3)
Net cash provided by (used in) investing activities	1.7	(395.7)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	(158.6)	(135.8)
Payments on debt and borrowings	(3.0)	(1.5)
Proceeds on debt and borrowings		0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	3.6	(4.2)
Change in overdraft balances and other	33.4	(10.2)
Net intercompany financing activity	12.2	70.6
Net cash provided by (used in) financing activities	(112.4)	(81.1)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	153.2	97.9
Effect of foreign exchange rate changes on cash and cash equivalents	(5.9)	26.5
Balance at beginning of year	271.1	272.1
Balance at end of period	418.4	396.5
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	1,791.4	1,145.4
Cash flows from investing activities:
Additions to properties	(491.0)	(466.0)
Proceeds from sales of properties and other assets	7.5	56.9
Other	(50.0)	11.1
Net intercompany investing activity	0.0	0.0
Net cash provided by (used in) investing activities	(533.5)	(398.0)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	6.7	3.6
Dividends paid	(265.6)	(264.9)
Payments on debt and borrowings	(310.2)	(2,601.5)
Proceeds on debt and borrowings		1,536.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	(374.8)	999.7
Change in overdraft balances and other	20.5	(40.7)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(923.4)	(367.8)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	334.5	379.6
Effect of foreign exchange rate changes on cash and cash equivalents	(3.0)	30.8
Balance at beginning of year	418.6	560.9
Balance at end of period	750.1	971.3
Consolidation, Eliminations [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	(136.8)	(611.3)
Cash flows from investing activities:
Additions to properties	0.0	0.0
Proceeds from sales of properties and other assets	0.0	0.0
Other	0.0	0.0
Net intercompany investing activity	(201.5)	367.3
Net cash provided by (used in) investing activities	(201.5)	367.3
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	136.8	611.3
Payments on debt and borrowings	0.0	0.0
Proceeds on debt and borrowings		0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	0.0
Change in overdraft balances and other	0.0	0.0
Net intercompany financing activity	201.5	(367.3)
Net cash provided by (used in) financing activities	338.3	244.0
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	0.0	0.0
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Balance at beginning of year	0.0	0.0
Balance at end of period	$ 0.0	$ 0.0