Supplemental Guarantor Information - Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	$ 1,493.2	$ 1,288.2
Cash flows from investing activities:
Additions to properties	(456.4)	(457.3)
Proceeds from sales of properties and other assets	4.6	101.0
Other	0.5	37.3
Net intercompany investing activity	0.0	0.0
Net cash provided by (used in) investing activities	(451.3)	(319.0)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	4.0	1.5
Dividends paid	(125.3)	(300.9)
Payments on debt and borrowings	(913.5)	(1,575.9)
Proceeds on debt and borrowings	1.5	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	224.6	262.9
Change in overdraft balances and other	(32.6)	(1.2)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(841.3)	(1,613.6)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	200.6	(644.4)
Effect of foreign exchange rate changes on cash and cash equivalents	7.3	(3.3)
Balance at beginning of year	523.4	1,057.9
Balance at end of period	731.3	410.2
Parent Issuer
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	498.3	990.0
Cash flows from investing activities:
Additions to properties	(4.9)	(7.2)
Proceeds from sales of properties and other assets	0.0	0.0
Other	3.2	46.2
Net intercompany investing activity	(73.2)	46.5
Net cash provided by (used in) investing activities	(74.9)	85.5
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	4.0	1.5
Dividends paid	(115.3)	(276.3)
Payments on debt and borrowings	(500.0)	(1,566.3)
Proceeds on debt and borrowings	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	224.6	264.8
Change in overdraft balances and other	(4.0)	(3.5)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(390.7)	(1,579.8)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	32.7	(504.3)
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	3.1
Balance at beginning of year	15.7	515.8
Balance at end of period	48.4	14.6
Subsidiary Guarantors
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	774.0	341.7
Cash flows from investing activities:
Additions to properties	(333.2)	(276.8)
Proceeds from sales of properties and other assets	2.3	97.3
Other	(4.5)	0.2
Net intercompany investing activity	(3,611.3)	69.4
Net cash provided by (used in) investing activities	(3,946.7)	(109.9)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	0.0	(205.5)
Payments on debt and borrowings	(404.2)	(0.3)
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	(34.6)	(9.8)
Net intercompany financing activity	3,641.0	(95.8)
Net cash provided by (used in) financing activities	3,202.2	(311.4)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	29.5	(79.6)
Effect of foreign exchange rate changes on cash and cash equivalents	3.4	3.3
Balance at beginning of year	119.6	156.1
Balance at end of period	152.5	79.8
Subsidiary Non Guarantors
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	220.9	162.0
Cash flows from investing activities:
Additions to properties	(118.3)	(173.3)
Proceeds from sales of properties and other assets	2.3	3.7
Other	1.8	(9.1)
Net intercompany investing activity	(3,569.1)	48.4
Net cash provided by (used in) investing activities	(3,683.3)	(130.3)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	(10.0)	(24.6)
Payments on debt and borrowings	(9.3)	(9.3)
Proceeds on debt and borrowings	1.5
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	(1.9)
Change in overdraft balances and other	6.0	12.1
Net intercompany financing activity	3,612.6	(68.5)
Net cash provided by (used in) financing activities	3,600.8	(92.2)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	138.4	(60.5)
Effect of foreign exchange rate changes on cash and cash equivalents	3.9	(9.7)
Balance at beginning of year	388.1	386.0
Balance at end of period	530.4	315.8
Eliminations
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	0.0	(205.5)
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	7,253.6	(164.3)
Net cash provided by (used in) investing activities	7,253.6	(164.3)
Cash flows from financing activities:
Exercise of stock options under equity compensation plans	0.0	0.0
Dividends paid	0.0	205.5
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	(7,253.6)	164.3
Net cash provided by (used in) financing activities	(7,253.6)	369.8
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